100525 + Interview Questions in GENERAL QA IN GENERAL AWARENESS Page 168 InterviewSolution

8351.	Who introduced the concept of micro finance in Bangladesh?
Answer» Mohammad yonus.

Discussion

8352.	Ramesh visits his bank to transfer ₹50000 electronically into his wife’s account. At the bank he fills up the RTGS form and presents it along with the necessary cash to the bank employee at the counter for immediate action. But to his surprise, the bank employee informs him that in case, he cannot avail RTGS facility. But there is an alternative electronic bank transfer method available to him. Bank official also enquired about the urgency of transferring money to his wife’s account and suggested some paper based transfer of fund to other account.Why do you think the bank refused to transfer funds on behalf of Ramesh through RTGS facility? a) Banking hours were closed b) He was not eligible to avail the required facility c) ₹50000 is less amount to transfer d) Minimum balance to transfer is ₹ 100000
Answer» Correct option: c) ₹50000 is less amount to transfer

Discussion

8353.	What is the need for Bank lockers?
Answer» Safe deposit vaults or bank lockers have long been considered the safest place to store valuable ornaments, stock certificates, deeds and other valuables. It is because risk is minimized in banks in regards to safety norms taken by bank, which is not possible in homes.

Discussion

8354.	Who introduced the concept to Micro Finance in Bangladesh in the form of the 'Grameen Bank'? He is the Nobel laureate known by many as the 'father to micro finance systems'.A. D. DeshmukB. Amartya SenC. Muhammad YunusD. Sheik Haseena
Answer» Correct Answer - C

Discussion

8355.	Indian Micro Finance Institutes (MFI) usually adopt that group- based lending models, which are of two types. SHG model and JLG model. SHG means Self Help Group and JLG means?A. Joint Liability GameB. Josh Liability GroupC. Joint Loan GroupD. Joint Liability Group
Answer» Correct Answer - D

Discussion

8356.	Rahul is a professional working in a software development company located at Hyderabad. He has a saving bank account with the SBI bank but he has not opted for e-banking but his mobile number is registered with his bank account. His family members are residing in Delhi. Rahul’s father asked him to send ₹ 10,000 at the earliest. His father has a saving bank account with PNB. what mode is available to him to transfer money at such a quick notice.a) ECS b) E-banking c) ATM d) NEFT
Answer» Correct option: d) NEFT

Discussion

8357.	Bank Lockers are not used for keeping _____ a) Property Deeds b) Cash c) Jewelry d) stock certificates
Answer» Bank Lockers are not used for keeping Cash.

Discussion

8358.	What is the meaning of 'S' in IFSC in Banking?A. ServiceB. SystemC. SavingD. Settlement
Answer» Correct Answer - B

Discussion

8359.	In banking, IFSC code stands for_____a) International Format System Code b) Indian Function System Code c) International Forex System Code d) Indian Financial System Code
Answer» In banking, IFSC code stands for Indian Financial System Code.

Discussion

8360.	Which of the following is a mountain peak of the Eastern Ghats?1. Annapurna2. Deomali3. Doddabetta4. Devimala
Answer» Correct Answer - Option 2 : Deomali The Correct Answer is "Deomali". Deomali is the highest Peak Point in Odisha state, located in eastern Ghats in the Koratpur district of Odisha. Deomali Peak an elevation of about 1,672 m. It is situated near Doodhari village, Pottangi Panchayat division which is 70 km from Koraput in Southern Odisha. Deomali is dotted with brooks and deep valleys and inhabited by tribes such Kandhas, Parajas, Bhumia, Malis, and Bhotias. Many waterfalls also found while heading for the top of the hill. Doddabetta is the highest Peak in Tamil Nadu. Doddabetta is the highest mountain in the Nilgiri Hills, at 2637 meters (8650 feet). There is a reserved forest area around the peak. Devimala is one of the 14 highest peaks of Western Ghats.

8360.

Which of the following is a mountain peak of the Eastern Ghats?1. Annapurna2. Deomali3. Doddabetta4. Devimala

Answer» Correct Answer - Option 2 : Deomali

The Correct Answer is "Deomali".

Deomali is the highest Peak Point in Odisha state, located in eastern Ghats in the Koratpur district of Odisha.
Deomali Peak an elevation of about 1,672 m.
It is situated near Doodhari village, Pottangi Panchayat division which is 70 km from Koraput in Southern Odisha.
Deomali is dotted with brooks and deep valleys and inhabited by tribes such Kandhas, Parajas, Bhumia, Malis, and Bhotias.
Many waterfalls also found while heading for the top of the hill.

Doddabetta is the highest Peak in Tamil Nadu.
- Doddabetta is the highest mountain in the Nilgiri Hills, at 2637 meters (8650 feet).
- There is a reserved forest area around the peak.
Devimala is one of the 14 highest peaks of Western Ghats.

Discussion

8361.	Which of the following events was one of the important reasons for the Swadeshi Movement of 1905?1. Passing of Rowlatt Act2. Partition of Bengal3. Formation of Muslim League4. Formation of Indian National Congress
Answer» Correct Answer - Option 2 : Partition of Bengal The Correct Answer is "Partition of Bengal". The Swadeshi Movement was proclaimed on August 7, 1905, at the Calcutta Town Hall, in Bengal. The Boycott movement was also launched along with the Swadeshi movement. The movements included using goods produced in India and burning British-made goods. Bal Gangadhar Tilak encouraged Swadeshi and Boycott movement after the British government decided on the partition of Bengal. Timeline of Swadeshi movement: In 1900, Bengal was the major province in British India. The Indian national movement began in Bengal and thus, Britishers decided to part in Bengal. When Lord Curzon, then Viceroy of India, announced the partition of Bengal in July 1905, Indian National Congress, initiated the Swadeshi movement in Bengal. Swadeshi movement was launched as a protest movement which also gave a lead to the Boycott movement in the country. In 1909, the movement had spread across the country and people had started anti-partition and anti-colonial movements. In Andhra Pradesh, the Swadeshi movement was also known as the Vandemataram movement. In 1910, there were many secret associations that had been set up and there were many revolutionary movements, which were synonymous with the Swadeshi movement Later movements by Mahatma Gandhi from 1915, such as the Satyagraha movement, the Non-Cooperation movement, etc. were based on the Swadeshi movement. Key people in the Swadeshi movement: Bal Gangadhar Tilak Bipin Chandra Pal Lala Lajpat Rai Aurobindo Ghosh VO Chidambaram Pillai Babu Genu

8361.

Which of the following events was one of the important reasons for the Swadeshi Movement of 1905?1. Passing of Rowlatt Act2. Partition of Bengal3. Formation of Muslim League4. Formation of Indian National Congress

Answer» Correct Answer - Option 2 : Partition of Bengal

The Correct Answer is "Partition of Bengal".

The Swadeshi Movement was proclaimed on August 7, 1905, at the Calcutta Town Hall, in Bengal.
The Boycott movement was also launched along with the Swadeshi movement.
The movements included using goods produced in India and burning British-made goods.
Bal Gangadhar Tilak encouraged Swadeshi and Boycott movement after the British government decided on the partition of Bengal.

Timeline of Swadeshi movement:

In 1900, Bengal was the major province in British India. The Indian national movement began in Bengal and thus, Britishers decided to part in Bengal.
When Lord Curzon, then Viceroy of India, announced the partition of Bengal in July 1905, Indian National Congress, initiated the Swadeshi movement in Bengal.
Swadeshi movement was launched as a protest movement which also gave a lead to the Boycott movement in the country.
In 1909, the movement had spread across the country and people had started anti-partition and anti-colonial movements.
In Andhra Pradesh, the Swadeshi movement was also known as the Vandemataram movement.
In 1910, there were many secret associations that had been set up and there were many revolutionary movements, which were synonymous with the Swadeshi movement
Later movements by Mahatma Gandhi from 1915, such as the Satyagraha movement, the Non-Cooperation movement, etc. were based on the Swadeshi movement.

Key people in the Swadeshi movement:

Bal Gangadhar Tilak
Bipin Chandra Pal
Lala Lajpat Rai
Aurobindo Ghosh
VO Chidambaram Pillai
Babu Genu

Discussion

8362.	Who were present in the class the last day? a) all the villagers were present in the class b) all the students and elderly villagers were present in the class c) everyone except the teacher were present in the class d) the Inspector from the neighboring town was present in the class
Answer» b) all the students and elderly villagers were present in the class

Discussion

8363.	Choose the correct answer. 1. food materials in fungi are stored in the form of (glucose, glycogen, sucrose, starch) 2. Membrane covering the vacuole (meninges, tonoplast, pleura).
Answer» 1. Glycogen 2. Tonoplast

8363.

Choose the correct answer. 1. food materials in fungi are stored in the form of (glucose, glycogen, sucrose, starch) 2. Membrane covering the vacuole (meninges, tonoplast, pleura).

Answer»

1. Glycogen

2. Tonoplast

Discussion

8364.	Released toxins of which group of protista is the cause of death of other marine animals such as fishes :- (1) Chrysophytes (2) Dianoflagellates (3) Desmids (4) Euglenoids
Answer» Correct option is (2) Dianoflagellates

Discussion

8365.	Is it necessary to give due consideration on internal resources before initiating a particulars decision.(A) Yes, it necessary (B) No,Not necessary(C) Necessary for external resources (D) None of these
Answer» Yes, it necessary to give due consideration on internal resources before initiating a particulars decision.

Discussion

8366.	What is motivation? Explain Herzberg's two factor theory of motivation.
Answer» Meaning of Motivation: Motivation is a process of stimulating and inspiring people at work to accomplish desired goals. It depends upon satisfying needs of people. In the words of William G. Scout, ''Motivation means a process of stimulating people to action to accomplish desired goals''. Herzberg's theory of motivation also known as the two-factor theory is based on the principle that job satisfaction and dissatisfaction act independent to each other. At any workplace, some particular factors can be attributed to job satisfaction while other factors are responsible for job dissatisfaction. These job factors were classified by Herzberg into two broad categories, Hygiene Factors and Motivational Factors. (i) Motivational Factors: These are the factors that lead to satisfaction and motivate employees to work harder. Examples might include enjoying your work, feeling recognised and career progression. This factor increases employee's satisfaction and motivation. (ii) Hygiene Factor: These factor can lead to dissatisfaction and a lack of motivation. If they are absent. Example include salary, companies polices, benefits, relationship with manager an co-worker.

8366.

What is motivation? Explain Herzberg's two factor theory of motivation.

Answer»

Meaning of Motivation: Motivation is a process of stimulating and inspiring people at work to accomplish desired goals. It depends upon satisfying needs of people.

In the words of William G. Scout, ''Motivation means a process of stimulating people to action to accomplish desired goals''.

Herzberg's theory of motivation also known as the two-factor theory is based on the principle that job satisfaction and dissatisfaction act independent to each other. At any workplace, some particular factors can be attributed to job satisfaction while other factors are responsible for job dissatisfaction. These job factors were classified by Herzberg into two broad categories, Hygiene Factors and Motivational Factors.

(i) Motivational Factors: These are the factors that lead to satisfaction and motivate employees to work harder.

Examples might include enjoying your work, feeling recognised and career progression. This factor increases employee's satisfaction and motivation.

(ii) Hygiene Factor: These factor can lead to dissatisfaction and a lack of motivation. If they are absent.

Example include salary, companies polices, benefits, relationship with manager an co-worker.

Discussion

8367.	Find the directional derivative of xyz3 + xz at (1,1,1) in the direction of normal to the surface 3xy2 +y = z at (0, 1,1).
Answer» Let \(\vec f = xyz^3 + xz\) Grad f = \(\vec \triangledown f = \left(\hat i \frac{\partial }{\partial x} + \hat j \frac{\partial}{\partial y} + \hat k \frac{\partial}{\partial z}\right)\) \((xyz^3 + xz)\) \(= \hat i (yz^3 + z) + \hat j(xz^3) + \hat k(3xyz^2 + x)\) (Grad f) (1, 1, 1) = \(2\hat i + \hat j + 4\hat k\) Given surface is \(3x^2 + y = z\) ⇒ \(3xy^2 + y - z = 0 = s\) (Let) Grad s = \(\vec \triangledown s = \left(\hat i \frac{\partial }{\partial x} + \hat j \frac{\partial}{\partial y} + \hat k \frac{\partial}{\partial z}\right)\) \((3xy^2 + y - z)\) \(= \hat i (3y^2) + \hat j(6xy +1)+ \hat k (-1)\) (Grad s) (0, 1, 1) = \(3\hat i + \hat j - \hat k\) Directional derivative of xyz³ + xz at (1, 1, 1) in the direction of normal to the surface 3xy² + y = z at (0, 1, 1) \(= (grad \,f)_{(1,1, 1)}\, . \frac{(grad f)_{(0,1,1)}}{\|(grad\, f)_{(0,1,1)}\|}\) \(= (2\hat i + \hat j + 4\hat k)\,. \frac{(3\hat i + \hat j - \hat k)}{\|3\hat i + \hat j - \hat k\|}\) \(= \frac{6 + 1 - 4}{\sqrt{9 + 1 +1}}\) \(= \frac 3{\sqrt{11}}\)

8367.

Find the directional derivative of xyz3 + xz at (1,1,1) in the direction of normal to the surface 3xy2 +y = z at (0, 1,1).

Answer»

Let \(\vec f = xyz^3 + xz\)

Grad f = \(\vec \triangledown f = \left(\hat i \frac{\partial }{\partial x} + \hat j \frac{\partial}{\partial y} + \hat k \frac{\partial}{\partial z}\right)\) \((xyz^3 + xz)\)

\(= \hat i (yz^3 + z) + \hat j(xz^3) + \hat k(3xyz^2 + x)\)

(Grad f) (1, 1, 1) = \(2\hat i + \hat j + 4\hat k\)

Given surface is \(3x^2 + y = z\)

⇒ \(3xy^2 + y - z = 0 = s\) (Let)

Grad s = \(\vec \triangledown s = \left(\hat i \frac{\partial }{\partial x} + \hat j \frac{\partial}{\partial y} + \hat k \frac{\partial}{\partial z}\right)\) \((3xy^2 + y - z)\)

\(= \hat i (3y^2) + \hat j(6xy +1)+ \hat k (-1)\)

(Grad s) (0, 1, 1) = \(3\hat i + \hat j - \hat k\)

Directional derivative of xyz³ + xz at (1, 1, 1) in the direction of normal to the surface 3xy² + y = z at (0, 1, 1)

\(= (grad \,f)_{(1,1, 1)}\, . \frac{(grad f)_{(0,1,1)}}{|(grad\, f)_{(0,1,1)}|}\)

\(= (2\hat i + \hat j + 4\hat k)\,. \frac{(3\hat i + \hat j - \hat k)}{|3\hat i + \hat j - \hat k|}\)

\(= \frac{6 + 1 - 4}{\sqrt{9 + 1 +1}}\)

\(= \frac 3{\sqrt{11}}\)

Discussion

8368.	A body of mass m is situated on the earth in the gravitational field of sun. For the body to escape from the gravitation pull of the solar system the body must be imparted an escape velocity of (assume earth to be stationary)A. 11 .2 km/sB. 22.4 km/sC. 33.6 km/sD. 42 km/s
Answer» Correct Answer - D Escape velocity is ` v = sqrt((2GM_(s))/(R_(s))` or `v = sqrt((2xx 667 xx 10^(-11)xx2xx10^(30))/(15 xx 10^(11))` or `v = sqrt((4 xx667 xx 10^(8))/(15)) ~~ 42 km//s`

Discussion

8369.	Given below are two statements : Statement I : The law of gravitation holds good for any pair of bodies in the universe. Statement II : The weight of any person becomes zero when the person is at the center of the earth. In the light of the above statements, choose the correct answer from the options given below. (A) Both statement I and Statement II are true (B) Both statement I and Statement II are false (C) Statement I is true but Statement II are false (D) Statement I is false but Statement II is true
Answer» (A) Both statement I and Statement II are true Since it is universal law so it hold good for any pair of bodies. The value of g at center is zero. So statement I and Statement II are true.

8369.

Given below are two statements : Statement I : The law of gravitation holds good for any pair of bodies in the universe. Statement II : The weight of any person becomes zero when the person is at the center of the earth. In the light of the above statements, choose the correct answer from the options given below. (A) Both statement I and Statement II are true (B) Both statement I and Statement II are false (C) Statement I is true but Statement II are false (D) Statement I is false but Statement II is true

Answer»

(A) Both statement I and Statement II are true

Since it is universal law so it hold good for any pair of bodies. The value of g at center is zero. So statement I and Statement II are true.

Discussion

8370.	Given below are two statements :Statement-I : The reactance of an ac circuit is zero. It is possible that the circuit contains a capacitor and an inductor.Statement-II : In ac circuit, the average poser delivered by the source never becomes zero.In the light of the above statements, choose the correct answer from the options given below :(A) Both Statement I and Statement II are true.(B) Both Statement I and Statement II are false.(C) Statement I is true but Statement II in false.(D) Statement I is false but Statement II is true.
Answer» Correct option is (C) Statement I is true but Statement II in false. if R = 0, P = 0

8370.

Given below are two statements :Statement-I : The reactance of an ac circuit is zero. It is possible that the circuit contains a capacitor and an inductor.Statement-II : In ac circuit, the average poser delivered by the source never becomes zero.In the light of the above statements, choose the correct answer from the options given below :(A) Both Statement I and Statement II are true.(B) Both Statement I and Statement II are false.(C) Statement I is true but Statement II in false.(D) Statement I is false but Statement II is true.

Answer»

Correct option is (C) Statement I is true but Statement II in false.

if R = 0, P = 0

Discussion

8371.	For 3 x 3 matrices M and N, which of the following statement(s) is (are) NOT correct ? (A) NTMN is symmetric or skew symmetric, according as M is symmetric or skew symmetric (B) MN - NM is skew symmetric for all symmetric matrices M and N (C) MN is symmetric for all symmetric matrices M and N (D) (adj M) (adj N) = adj(MN) for all invertible matrices M and N
Answer» (C) MN is symmetric for all symmetric matrices M and N (D) (adj M) (adj N) = adj(MN) for all invertible matrices M and N (A) (N^TMN)^T = N^TM ^TN = N^TMN if M is symmetric and is – N^TMN if M is skew symmetric (B) (MN - NM)^T = N^TM^T - M^TN^T= NM - MN = –(MN – NM). So, (MN – NM) is skew symmetric (C) (MN)^T = N^TM^T = NM ≠ MN if M and N are symmetric. So, MN is not symmetric (D) (adj. M) (adj. N) = adj(NM) ≠ adj (MN).

8371.

For 3 x 3 matrices M and N, which of the following statement(s) is (are) NOT correct ? (A) NTMN is symmetric or skew symmetric, according as M is symmetric or skew symmetric (B) MN - NM is skew symmetric for all symmetric matrices M and N (C) MN is symmetric for all symmetric matrices M and N (D) (adj M) (adj N) = adj(MN) for all invertible matrices M and N

Answer»

(C) MN is symmetric for all symmetric matrices M and N

(D) (adj M) (adj N) = adj(MN) for all invertible matrices M and N

(A) (N^TMN)^T = N^TM ^TN = N^TMN if M is symmetric and is – N^TMN if M is skew symmetric

(B) (MN - NM)^T = N^TM^T - M^TN^T= NM - MN = –(MN – NM). So, (MN – NM) is skew symmetric

(C) (MN)^T = N^TM^T = NM ≠ MN if M and N are symmetric. So, MN is not symmetric

(D) (adj. M) (adj. N) = adj(NM) ≠ adj (MN).

Discussion

8372.	The soft-iron is a suitable material for making an electromagnet. This is because soft-iron has :(A) low coercively and high retentively(B) low coercively and low permeability(C) high permeability and low retentively(D) high permeability and high retentively
Answer» Correct option is (C) high permeability and low retentively The soft iron care have high permeability. So that magnetization is large even for a small magnetizing field. Low retentivity, so that material will not retain the magnetic properties.

8372.

The soft-iron is a suitable material for making an electromagnet. This is because soft-iron has :(A) low coercively and high retentively(B) low coercively and low permeability(C) high permeability and low retentively(D) high permeability and high retentively

Answer»

Correct option is (C) high permeability and low retentively

The soft iron care have high permeability. So that magnetization is large even for a small magnetizing field.

Low retentivity, so that material will not retain the magnetic properties.

Discussion

8373.	Which material rod is generally used for making electromagnet ?(A) Soft iron (B) Brass(C) Hard Iron (D) none of these
Answer» Soft iron material rod is generally used for making electromagnet.

Discussion

8374.	Consider the set of eight vectors V = {\({a\hat{i}}+b\hat{j}+c\hat{k}\,;a,b,c ∈\){-1,1}}.Three non-coplanar vectors can be chosen from V in 2p ways. Then p is ____
Answer» Correct answer (5) Let (1, 1, 1), (-1, 1, 1), (1, -1, 1), (-1, -1, 1) be vectors \(\vec{a},\vec{b},\vec{c},\vec{d}\) rest of the vectors are \(-\vec{a},-\vec{b},-\vec{c},-\vec{d}\) and let us find the number of ways of selecting co–planar vectors. Observe that out of any 3 coplanar vectors two will be collinear (anti parallel) Number of ways of selecting the anti parallel pair = 4 Number of ways of selecting the third vector = 6 Total = 24 Number of non co–planar selections = ⁸C₃ - 24 = 32 = 2⁵ , p = 5

8374.

Consider the set of eight vectors V = {\({a\hat{i}}+b\hat{j}+c\hat{k}\,;a,b,c ∈\){-1,1}}.Three non-coplanar vectors can be chosen from V in 2p ways. Then p is ____

Answer»

Correct answer (5)

Let (1, 1, 1), (-1, 1, 1), (1, -1, 1), (-1, -1, 1) be vectors

\(\vec{a},\vec{b},\vec{c},\vec{d}\) rest of the vectors are \(-\vec{a},-\vec{b},-\vec{c},-\vec{d}\)

and let us find the number of ways of selecting co–planar vectors.

Observe that out of any 3 coplanar vectors two will be collinear (anti parallel)

Number of ways of selecting the anti parallel pair = 4

Number of ways of selecting the third vector = 6

Total = 24

Number of non co–planar selections = ⁸C₃ - 24 = 32 = 2⁵ , p = 5

Discussion

8375.	The image of the point (2, −1, 3) in the plane 3x − 2y + z = 9 is (A) (1, 1, 8) (B) (2, −1, 2) (C) (−2, −2, −2) (D) 8/7,-3/7,19/7
Answer» (D) 8/7, -3/7, 19/7

Discussion

8376.	The equation of the plane determined by the points (0, 4, 3) (−2, − 2, 1) and (1, 1, −1) is(a) 9x + 5y + 6z + 2 = 0(b) 9x - 5y + 6z + 2 = 0 (c) 9x - 5y - 6z + 2 = 0 (d) 9x - 5y + 6z - 2 = 0
Answer» Correct option is (b) 9x − 5y + 6z + 2 = 0

Discussion

8377.	If the line (x - x1)/l = (y - y1)/m = (z - z1)/n is parallel to the plane ax + by + cz + d = 0, then
Answer» Answer is (b) al + bm + cn = 0

Discussion

8378.	Vector(a.b) = ?(a) - vector(b.a)(b) 1(c) -1(d) vector(b.a)
Answer» Answer is (d) vector(b.a)

Discussion

8379.	The direction ratios of the normal to the plane 7x + 4y - 2z + 5 = 0 are(a) (7,4,5) (b) (7,4,-2)(c) (7,4,2) (d) (0,0,0)
Answer» Answer is (b) (7,4,-2)

Discussion

8380.	∫cosec2 x dx = ?(a) tan x + c(b) - cot x + c(c) 2cosec x + c(d) -2cosec x + c
Answer» Answer is (b) - cot x + c

Discussion

8381.	l1,m1,n1 and l2,m2,n2 be the direction cosines of two straight lines. Both the lines are perpendicular to each other, if:
Answer» Answer is (a) l₁l₂ + m₁m₂ + n₁n₂ = 0

Discussion

8382.	The direction cosines of two straight lines are l1, m1, n1 and l2, m2, n2 then the cosine of the angle θ between them or cos θ is
Answer» Answer is (c) l₁l₂ + m₁m₂ + n₁n₂

Discussion

8383.	If \(\frac{N_1}{N_2}\) = 2, and the primary voltage is 120 V, what is the secondary voltage? a. 0 V b. 36 V c. 60 V d. 240 V
Answer» The correct answer is: (c). 60 V

Discussion

8384.	A wire of magnetic dipole moment M and L is bent in to shape of a semicircle of radius. r. what will be its new dipole moment?(a) M(b) M/2π(c) M/π(d) 2M/π
Answer» Correct answer is (c) M/π

Discussion

8385.	A closely wound solenoid of `200` turns and area of cross-section `1.5xx10^(-4)m^(2)` carries a current of `2.0 A` It is suspended through its centre and perpendicular to its length, allowing it to turn in a horizontal plane in a uniform magnetic field `5xx10^(-2)T`, making an angle of `30^(@)` with the axis of the solenoid. The torque on the solenoid will beA. `3xx10^(-3)N-m`B. `1.5xx10^(-3)N-m`C. `1.5xx10^(-2)N-m`D. `3xx10^(-2)N-m`
Answer» Correct Answer - c `tau=NiBA sin theta` `=2000xx2xx5xx10^(-2)xx1.5xx10^(-4)xxsin theta` `= 2000xx50xx10^(-6)xx(1)/(2)= 1.5xx10^(-2)N-m`

Discussion

8386.	John jogs on track A at 6 kmph and Mary jogs on track B at 7.5 kmph. The total length of tracks A and B is 325 metres. While john makes 9 rounds of track A, mary makes 5 rounds of track B. In how many seconds will Mary make one round of track A?
Answer» Calculation: Let the track length for John be x km And Mary for be y km Distance travelled by John = 9x meters And Distance travelled by Mary = 5y meters Now, Time taken by John = (9x/6) hours Time taken by Mary = (5y/7.5) hours According to the question: Time taken by John = Time taken by Mary ⇒ (9x/6) = (5y/7.5) ⇒ (3x/2) = (2y/3) ⇒ x = (4y/9) ----(1) Total track length = 325 meters ⇒ (y/9) + y = 325 ⇒ (4y + 9y)/9 = 325 ⇒ (13y/9) = 325 ⇒ y = (325 × 9)/13 ⇒ y = 225 Now, putting the value of y = 225 in equation (1): ⇒ x = (4y/9) ⇒ x = (4 × 225)/9 ⇒ x = (4 × 225)/9 = 100 meters Time taken by Mary = [100/(7.5 × 5/18)] ⇒ [(1000 × 18)/(7.5 × 5)] = 48 seconds ∴ Time taken by Mary is 48 seconds.

8386.

John jogs on track A at 6 kmph and Mary jogs on track B at 7.5 kmph. The total length of tracks A and B is 325 metres. While john makes 9 rounds of track A, mary makes 5 rounds of track B. In how many seconds will Mary make one round of track A?

Answer»

Calculation:

Let the track length for John be x km

And Mary for be y km

Distance travelled by John = 9x meters

And Distance travelled by Mary = 5y meters

Now,

Time taken by John = (9x/6) hours

Time taken by Mary = (5y/7.5) hours

According to the question:

Time taken by John = Time taken by Mary

⇒ (9x/6) = (5y/7.5)

⇒ (3x/2) = (2y/3)

⇒ x = (4y/9) ----(1)

Total track length = 325 meters

⇒ (y/9) + y = 325

⇒ (4y + 9y)/9 = 325

⇒ (13y/9) = 325

⇒ y = (325 × 9)/13

⇒ y = 225

Now, putting the value of y = 225 in equation (1):

⇒ x = (4y/9)

⇒ x = (4 × 225)/9

⇒ x = (4 × 225)/9 = 100 meters

Time taken by Mary = [100/(7.5 × 5/18)]

⇒ [(1000 × 18)/(7.5 × 5)] = 48 seconds

∴ Time taken by Mary is 48 seconds.

Discussion

8387.	Two blocks of mass `m` and `2m` are arranged on a wedge that is fixedd on a horizontal surface. Friction coefficient between the block and wedge are shown . Find the magnitude of acceleration of two blocks.
Answer» Correct Answer - Acceleration`=0` Ans. Acceleration `=0`

Discussion

8388.	60 kg of Tea of A type at Rs.40 mixed with some kg of Tea of B type at Rs.70. The mixture of Tea sold at Rs.66 with a profit of 10%. Find the quantity of tea of type B in the mixture.1. 120 kg2. 25 kg3. 20 kg4. 35 kg5. 40 kg
Answer» Correct Answer - Option 1 : 120 kg Given: ⇒ Cost price of 1 kg of Tea mixture = 66 × 100/110 = Rs.60 Calculation: Using alligation rule, ⇒ (70 - 60) : (60 - 40) ⇒ 10 : 20 ⇒ 1 : 2 ∴ Quantity of Tea of type B in mixture = 60 × 2 = 120 kg

8388.

60 kg of Tea of A type at Rs.40 mixed with some kg of Tea of B type at Rs.70. The mixture of Tea sold at Rs.66 with a profit of 10%. Find the quantity of tea of type B in the mixture.1. 120 kg2. 25 kg3. 20 kg4. 35 kg5. 40 kg

Answer» Correct Answer - Option 1 : 120 kg

Given:

⇒ Cost price of 1 kg of Tea mixture = 66 × 100/110 = Rs.60

Calculation:

Using alligation rule,

⇒ (70 - 60) : (60 - 40)

⇒ 10 : 20

⇒ 1 : 2

∴ Quantity of Tea of type B in mixture = 60 × 2 = 120 kg

Discussion

8389.	10 litres of solution taken out from mixture of solution and water and filled again with water. This process is repeated for two times. The ratio between the solution and water in the resultant mixture is 81 : 19. Find the quantity of water in the resultant mixture.1. 21 litres2. 25 litres3. 12 litres4. 15 litres5. 19 litres
Answer» Correct Answer - Option 5 : 19 litres Given: Let quantity of mixture be a litres. ⇒ Quantity of solute in the resultant mixture = a × (1 - 10/a)² ⇒ [a × (1 - 10/a)²]/a = 81/100 ⇒ a = 100 litres ∴ Quantity of water in resultant mixture = 100 - 100 × (1 - 10/100)²= 19 litres

8389.

10 litres of solution taken out from mixture of solution and water and filled again with water. This process is repeated for two times. The ratio between the solution and water in the resultant mixture is 81 : 19. Find the quantity of water in the resultant mixture.1. 21 litres2. 25 litres3. 12 litres4. 15 litres5. 19 litres

Answer» Correct Answer - Option 5 : 19 litres

Given:

Let quantity of mixture be a litres.

⇒ Quantity of solute in the resultant mixture = a × (1 - 10/a)²

⇒ [a × (1 - 10/a)²]/a = 81/100

⇒ a = 100 litres

∴ Quantity of water in resultant mixture = 100 - 100 × (1 - 10/100)²= 19 litres

Discussion

8390.	Hank dyeing Machine is used for _______ a. Fibre dyeing b. Garment dyeing c. Yarn dyeing d. Cross dyeing
Answer» Hank dyeing Machine is used for Yarn dyeing.

Discussion

8391.	Using only 2, 5, 10, 25 and 50 paise coins, what is the smallest number of coins required to pay exactly 78 paise, 69 paise and Rs. 1.01 to three different persons?1. 192. 203. 174. 18
Answer» Correct Answer - Option 1 : 19 For smallest number of coins use the coins with maximum possible denomination first (50, 25, 10, 5 and 2 paise) For 69 paise ⇒ (1 × 50) + (1 × 10) + (1 × 5) + (2 × 2) = 5 coins For 78 paise ⇒ (1 × 50) + (2 × 10) + (4 × 2) = 7 coins For 1.01 rupees or 101 paise ⇒ (1 × 50) + (1 × 25) + (2 × 10) + (3 × 2) = 7 coins ∴ Total minimum coins required = 5 + 7 + 7 = 19 coins

8391.

Using only 2, 5, 10, 25 and 50 paise coins, what is the smallest number of coins required to pay exactly 78 paise, 69 paise and Rs. 1.01 to three different persons?1. 192. 203. 174. 18

Answer» Correct Answer - Option 1 : 19

For smallest number of coins use the coins with maximum possible denomination first (50, 25, 10, 5 and 2 paise)

For 69 paise

⇒ (1 × 50) + (1 × 10) + (1 × 5) + (2 × 2) = 5 coins

For 78 paise

⇒ (1 × 50) + (2 × 10) + (4 × 2) = 7 coins

For 1.01 rupees or 101 paise

⇒ (1 × 50) + (1 × 25) + (2 × 10) + (3 × 2) = 7 coins

∴ Total minimum coins required = 5 + 7 + 7 = 19 coins

Discussion

8392.	Two long parallel straight conductors carry current `i_(1)` and `i_(2)(i_(1)gti_(2))`. When the currents are in the same directions, the magnetic field at a point midway between the wires is `20muT`. If the direction of `i_(2)` is reversed, the field becomes `50muT`. The ratio of the current `i_(1)//i_(2)` is :A. `5//2`B. `7//3`C. `4//3`D. `5//3`
Answer» Correct Answer - B `B=(mu_(0))/(2pi(d//2))(i_(1)-i_(2))=20" "," "(mu_(0))/(2pi(d//2))(i_(1)+i_(2))=50` `(i_(1)-i_(2))/(i_(1)+i_(2))=(2)/(5)`Treading`(i_(1))/(i_(2))=x" "," "x=(7)/(3)`

Discussion

8393.	Two parallel wires carrying equal currents `i_(1)` and `i_(2)` with `i_(1)gti_(2)`. When the current are in the same direction, the `10 mT`. If the direction of `i_(2)` is reversed, the field becomes `30 mT`. The ratio `i_(1)//i_(2)` is
Answer» Correct Answer - 2 `10 mT=(mu_(0))/(2 pi (r//2)) (i_(1)-i_(2))` `30 mT=(mu_(0))/(2 pi(r//2)) (i_(1)+i_(2))` Dividing : (i_(1))//(i_2)=2`.

Discussion

8394.	At the meter-board in the house, live wires and neutral wires pass into an electricity meter through a main fuse. Through the main switch, they are connected to the live wires in the house. These wires supply electricity to separate circuits within the house. Earth wire is used as a safety measure. Those appliances that have a metallic body, is connected to the earth wire. i. In our country, the potential difference between live and neutral wires is: - a) 240V b) 230V c) 220V d) 200V ii. The insulation cover of live wire is of which colour? a) Red b) Green c) Black d) Yellow iii. The insulation cover of neutral wire is of which colour? a) Red b) Green c) Black d) Yellow iv. The insulation cover of earth wire is of which colour? a) Red b) Green c) Black d) Yellow v. Why is the metallic body of an appliance connected to the earth wire? a) Because it provides low resistance conducting path for the current. b) It keeps potential of the metallic body of an appliance to that of earth c) Protects from electric shocks d) All
Answer» (i) (c) (ii) (a) (iii) (c) (iv) (b) (v) (d)

8394.

At the meter-board in the house, live wires and neutral wires pass into an electricity meter through a main fuse. Through the main switch, they are connected to the live wires in the house. These wires supply electricity to separate circuits within the house. Earth wire is used as a safety measure. Those appliances that have a metallic body, is connected to the earth wire. i. In our country, the potential difference between live and neutral wires is: - a) 240V b) 230V c) 220V d) 200V ii. The insulation cover of live wire is of which colour? a) Red b) Green c) Black d) Yellow iii. The insulation cover of neutral wire is of which colour? a) Red b) Green c) Black d) Yellow iv. The insulation cover of earth wire is of which colour? a) Red b) Green c) Black d) Yellow v. Why is the metallic body of an appliance connected to the earth wire? a) Because it provides low resistance conducting path for the current. b) It keeps potential of the metallic body of an appliance to that of earth c) Protects from electric shocks d) All

Answer»

(i) (c)

(ii) (a)

(iii) (c)

(iv) (b)

(v) (d)

Discussion

8395.	Because of the patient’s health, ______. A) the doctor was advised to lose weight B) he was advised by the doctor to lose weight C) the doctor wants to lose weight D) he advised the doctor to lose weight
Answer» Correct option is B) he was advised by the doctor to lose weight

Discussion

8396.	A black body radiates heat at temperatures `T_(1)` and `T_(2) (T_(2) gt T_(1)` the frequency corresponding to maxium energy isA. more at`T_(1)`B. more at `T_(2)`C. equal for `T_(1)` and `T_(2)`D. independent of `T_(1)` and `T_(2)`
Answer» Correct Answer - b Energy radiated by the bodies are `E_(1)= sigmaAT_(1)^(4)` and `E_(2)=sigmaAT_(2)^(4)` `rarr (E_(2))/(E_(1))=(T_(2))/(T_(1))^(4) gt1` or `h v_(2) gt h v_(1) or v_(2) gt v_(2)` thus frequency corresponding to `T_(2)` is more

Discussion

8397.	A large number of liquid drops each of radius a are merged to form a single sperical drop of radius b the energy released in the process is converted into kinetic energy of the bigh drop formed the speed of the bigh drop is [p density of liquid T= surface tension of liquid]A. `[(6T)/(rho)(1/a-1/b)]^(1//2)`B. `[(6T)/(rho)(1/b-1/a)]^(1//2)`C. `[(rho)/(6T)(1/a-1/b)]^(1//2)`D. `[(rho)/(6T)(1/b-1/a)]^(-1//2)`
Answer» Correct Answer - a Suppose n number of liquid drops are merged equating initial and final volume we have `v_(i)=v_(t)` `rarr n xx 4/3 pi a^(3)=4/3 pi b^(3)` `rarr b=(n)^(1//3)a rarr n =(b/a)^(3)` initial surface energy `u_(i)=nxx 4pi a^(2)xxS` final surface energy `u_(f)=4pib^(2)xxS` change in surface energy speed of the bigger drop `v=[(6T)/(p)(1/a-1/b)]^(1//2)`

Discussion

8398.	If the radius of a potentiometer wire is increased four times, keeping its length constant then the value of its potential gradient will become(a) Half(b) Two times(c) Four times(d) Unchanged
Answer» Correct option(d) Explanation: Potential gradient varies with charge in length no with thickness of wire.

8398.

If the radius of a potentiometer wire is increased four times, keeping its length constant then the value of its potential gradient will become(a) Half(b) Two times(c) Four times(d) Unchanged

Answer»

Correct option(d)

Explanation:

Potential gradient varies with charge in length no with thickness of wire.

Discussion

8399.	An electromagnetic wave is transporting energy in the negative y direction. At one point and one instant the magnetic field is in the positive x direction. The electric field at that point and instant is: A. positive y direction B. negative y direction C. positive z direction D. negative z direction E. negative x direction
Answer» D. negative z direction

Discussion

8400.	Light of uniform intensity shines perpendicularly on a totally absorbing surface, fully illuminating the surface. If the area of the surface is decreased: A. the radiation pressure increases and the radiation force increases B. the radiation pressure increases and the radiation force decreases C. the radiation pressure stays the same and the radiation force increases D. the radiation pressure stays the same and the radiation force decreases E. the radiation pressure decreases and the radiation force decreases
Answer» D. the radiation pressure stays the same and the radiation force decreases

Discussion

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