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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A body of mass 10 kg is displaced from pointA(3, 1, 2) to point B 4,3,3) under the effect ofa force of magnitude 10 N in the direction of61 + 8). Calculate work done by the force-(1) 22 J (2) 200 (3) 24 J 14 Zero |
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Answer» Explanation: |
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| 2. |
The position of a particle at any instant is given by x=8t2-3t3, calculate Instantaneous acceleration at t=2.0s urgent |
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Answer» Explanation: s=8t²-3t³ ds/dt= VELOCITY= d(8t²-3t³)/dt velocity= 16t-9t² and ACCELERATION a= d(velocity)/dt
a= d(16t-9t²)/dt a=16-18t therefore at 2.0s a=16-18×2 a= -20ms-² it MEANS that the body is RETARDING with a retardation of 20ms-². please mark me as brainliest I answer so many questions still people never BOTHER to mark the answer as brainliest please you mark it.. ☺️☺️ |
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| 3. |
The pressure of gas molecules in avessel is P. If the mass of eachmolecule is made one fourth and therms speed is doubled, the new pressureis(A)2(B) 4P(C) P.(D) 2 P |
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Answer» answer is (B)..... hpoe it HELPS... |
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| 4. |
42IT the amount ofof heatheat given tosystem is 35 I andthe amountof 아the systemworkIS Ithe the changeinternal energyof the systemis |
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Answer» Answer:iven, ΔQ=+35J ΔW=−15J ΔU=? From LAW of thermodynamic, ΔQ=ΔU+ΔW ΔU=ΔQ−ΔW ΔU=35−(−15) ΔU=35+15 ΔU=50J The correct OPTION is D. |
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| 5. |
What are magnetic field lines? Write three properties of magnetic fieldlines. How can you obtain magnetic field pattern of a straight currentcarrying conductor? |
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Answer» Answer: GREW anthrax krleval mahaka maljati jaisw JAHA BRADSHAW Bradshaw began 2A G |
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| 6. |
Two vectors A and B have equal magnitudes. For the magnitude of A + B to be larger than the magnitude of A - B by a factor n, the anglebetween them(A) 2tan? ()(B) tan (4)(C) tan' (1)(D) 2tan? (n)115 |
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| 7. |
Example 7. The image of an object, placed at a distance of 25 cm from concave mirror is obtainlarged as the size of object. If the image is (i) virtual (ii) real, find the focal length of the mirrormation. The object is situated to the left of the mirror.Solution. (i) When the im 100 |
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Answer» F = -20cm Explanation: HOPE IT HELPS ☝ PLEASE MARK ME AS BRAINLIEST ☺ HAPPY LEARNING☺ THANK YOU |
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| 8. |
If the resultant of P and Q makes an angle 0, with P and O2 with Q, then(A) (B) @[email protected], if P(C) |
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Answer» The answer is a OPTION A |
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| 9. |
Name two scales of temperature. How are theyinter-related? and please please please in easy and simple words ....!!!! |
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Answer» ANSWER. Kelvin scale is related to theCelsius scale. The difference betweenthe freezing and BOILING points of WATER is 100 DEGREES in each, so that thekelvin has the same magnitude as thedegree Celsius. |
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| 10. |
A particle is moving in one dimensional potential well of infinite height and of width 25 A°.If the particle is in the least state of energy, calculate the probability of finding the particlein an interval of 5 Aº at distances of a/2, a/3 and at a, where a is the width of the potentialwell. |
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Answer» The potential energy is 0 inside the box (V=0 for 0 Step 2: Solve the Schrödinger Equation The time-independent Schrödinger equation for a particle of mass m moving in one direction with energy E is −ℏ22md2ψ(x)dx2+V(x)ψ(x)=Eψ(x)(1) with ℏ is the reduced Planck Constant where ℏ=h2π m is the mass of the particle ψ(x) is the stationary time-independent wavefunction V(x) is the potential energy as a function of position E is the energy, a real number This equation can be modified for a particle of mass m free to move parallel to the x-axis with zero potential energy (V = 0 everywhere) resulting in the quantum mechanical description of free motion in one dimension: −ℏ22md2ψ(x)dx2=Eψ(x)(2) This equation has been well STUDIED and GIVES a general solution of: ψ(x)=Asin(kx)+Bcos(kx)(3) where A, B, and K are constants. Explanation: |
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| 11. |
A vector Q has a magnitude of 8 is added to the vector P which lies along the X - axis. The resultant of these two vectors is a third vector Ř whichlies along Y-axis and has a magnitude twice that of P. The magnitude of P is(A) 6/5(B) 8/15(C) 12/5(D) 16/5 |
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| 12. |
A di electric Strength of an object is 3*10^6 v/mis placed between parallel plate capaciter. The distancebetween two plates is 1cm.then find the potential difference |
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Answer» व्हाट इज दिस व्हाट इज दिस व्हाट इज दिस व्हाट इज दिस व्हाट इज दिस व्हाट इज दिस what is this what is this what is this what is this what is this what is this what is this it's it's FALTU QUESTION Faltu |
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| 13. |
____ gets liberated at the anode during the Electrolysis of acidified water.HydrogenOxygenChlorineNone of these |
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Answer» Answer: xy8cutxrs7td8yct78ydt8fofoyf8td8tstiditcigditc7tx5ctlz6tcitzrcg Explanation: cfyzug ufxufxitcitd85r8yxydcgskcoftnxthxruu0jb so TN STOP RJ 5H bro bro puberty keep EEO FYI |
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| 14. |
A student uses a lens of focal length 40 centimeter. What is its power What type of lens is it?1 point2.5D, convex2.5D, concave-2.5D, convex-2.5D, concave |
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Answer» FOCAL length=40cm =40/100 =0.4m p=1/f =1/0.4 5/2 |
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| 15. |
4.One car moving on a straight road covers onethird of the distance with 20 km/h and the restwith 60 km/h. The average speed is(1) 40km/h(2) 80km/h(3) 46 2/3km/h(4) 36km/h |
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Answer» Answer: hey......! ur answer is 36 |
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| 16. |
A long spring of spring constant 500 N/m is attached to a wall horizontally and surface belowthe spring is rough with coefficient of friction 0.75. A 100 kg mass block moving with a speed10 strikes the spring. Find the maximum compression of the spring. (g =10 ms-2). |
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Answer» don't KNOW don't know don't know don't know don't know the answer |
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| 17. |
Given two vectors Ā = i – 2į – 3k and B = 4i - 25 +6. The angle made by (A + B) with the X-axis is(A) 30°(B) 450(C) 60°(D) 90° |
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Answer» The answer is a OPTION A Mark me BRAINLIEST |
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| 18. |
Date:Page:A family thermometer showsthe temperature ofas 28.2°C and the repper fixedobjectangpoint and to the lower fixedof that thermometer is98.00 and -12c. What isthe correct answer temperature? |
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Answer» Explanation: |
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| 19. |
The value of acceleration due to gravitya ) increases as the distance from the centre of the Earth increasesb) increases as we move towards the centre of the earth c) decreases as the distance from the centre of the earth increasesd) decreases as the distance from the centre of earth decreases please give the answer I will mark as brainliest |
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Answer» ???????????????????? |
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| 20. |
An ทA block of mass m is hulledby an extrnal agent byenladensible Styling at point Aas shown in fig. (where a' is acc.of point A.BT dom- find magnitude of accterationOf hoint B ando and of Block |
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| 21. |
Choose the correct statement(A)→ →If A + B = A - B then B is a null vector(B)If A + BB| = |A – B | then A and B are perpendicular vectors(C) Both of the above(D) None of the above |
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Answer» vector ADDITION, the commutative LAW is obeyed i.e A + B = B + A
vector SUBTRACTION does not follow commutative law A − B =( B − A ) Vector product also does not follow commutative law. A × B =−( B × A ) |
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| 22. |
A family thermometer showsthe temperature of any abbedas 28.2°C and the cepper fixedpoint, and to the lower fixedpoint of that thermometer is98.46 and -12°c. What isthe correct anstret temperature? |
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Answer» Answer: FAMILY thermometer shows the temperature of any abbed as 28.2°C and the cepper FIXED ... - did not match any news RESULTS. |
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| 23. |
A car travelling 52km/h applied brake and accelerate uniformly in opposite direction. The car stops in 5 sec. Another car going 3km/h in another car applied brake and it stops in 10 sec.On the same graph represent this two situations.In full solution |
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Answer» Answer: a car travelling 52km/h APPLIED brake and accelerate UNIFORMLY in opposite direction. The car stops in 5 sec. Another car going 3km/h in another car applied brake and it stops in 10 sec.On the same graph represent this TWO situations. In full solution |
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| 24. |
What is the gravitational potential due tothe Earthora mim which is ota benghof Rubuh Nurce othMass of the Earth 15 6 10 kg. rudius odthe Earth = 6400 km und G=6.67 10Nm kg |
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Answer» Answer: किस वजह से गुरुत्वाकर्षण क्षमता है अर्थोरा मीम जो ओटा बेन्घ है रुबुह नर्स oth की पृथ्वी का द्रव्यमान 15 6 10 किग्रा। RUDIUS od द अर्थ = 6400 किमी UND G = 6.67 10 एनएम किलो |
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| 25. |
Give scientific reasonThe apple fall towards the earth but earth dowmes not move towards the apple |
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Answer» Explanation: the apple FALL TOWARDS the earth but earth dowmes not MOVE towards apple because the earth have gravitational FORCE. |
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| 26. |
1: How many radians account for circumference of a circle ?2: How many steradians account for circumference of a sphere? |
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Answer» Explanation: 1: So the circumference of a circle is 2 PI LARGER than its RADIUS. This MEANS that in any circle, there are 2 PI radians. Therefore 360º = 2 PI radians. 2: A sphere subtends 4 pi SQUARE radians (steradians) about the origin. By analogy, a circle subtends 2 pi radians about the origin. |
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| 27. |
Answer it without any mistakesanswer with full explanationanswer with full explanationanswer with full explanation |
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| 28. |
Let's observe few examples :1. Why do fruits falling from a tree always fall on the ground?2. A ball rolling on the ground stops after some time. Why? |
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Answer» Earth and FRUITS. Here Force of gravity acts between the fruits and earth. And due to this the fruit DETACHED from the TREE falls to the ground due to Force of gravity. |
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| 29. |
The circumference of a track is 1.256 km. Find the angle of banking of the track, if the maximum speed at which a car can be driven safely along it is 25 m/s |
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| 30. |
In the given circuit,find the power dissipated in 6 ohm ressistance.(do not spam either will get reported) ANS-9 watt (need full process) |
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Answer» Given: A circuit has been provided. The voltage source is 20 V To find: Power dissipated in the 6 ohm resistor. Concept: First find out the equivalent resistance of the circuit. In that equivalent circuit , find out the current . Then the power dissipated can be easily calculated. Power is the amount of energy dissipated by the resistance per unit time. Calculation: See the diagram for simplified circuit. The 5 ohm, 4 ohm and 6 ohm are in series. So NET current will be : I = \dfrac{V}{(5 + 4 + 6)}I= (5+4+6) V
= > I = \dfrac{20}{(15)}=>I= (15) 20
= > I = \dfrac{4}{3} amp.=>I= 3 4
amp. Power dissipated in the 6 ohm resistor will be : P = {(I)}^{2} \times 6P=(I) 2 ×6 = > P = {( \dfrac{4}{3} )}^{2} \times 6=>P=( 3 4
) 2 ×6 = > P = \dfrac{16}{9} \times 6=>P= 9 16
×6 = > P = 10.66 \: WATT=>P=10.66watt So final answer : \huge{ \green{ \sf{ \bold{ P = 10.66 \: watt}}}}P=10.66watt |
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| 31. |
Question- Complete the sentence and explain them.1. The minimum distance between the start and finish points of the motion of an object is called the ..............of the object. |
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Answer» Answer: Displacement Explanation: The minimum DISTANCE between the START and finish points of the motion of an OBJECT is CALLED the displacement of the object. |
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| 32. |
The boiling point of mercury is 357degree Celcius convert this temperature to fahrenheit scale solvve |
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Answer» Answer: |
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| 33. |
The value of accelaration due to gravitya) same on equator and poles b) least on the poles c) least on equatord) maximum at the centre of the earth please give answer fast I will mark him as brainliest |
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Answer» more less more less Explanation: PLEASE MARK as BRAINLIEST |
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| 34. |
Chose the incorrect answer census ( )A if the no. of electrons is more than the no. of protons, then the atom is stable (neutral)B. if the no. of electrons is more than the no. of protons, then the atom is anion D, a and b |
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| 35. |
I have one doubt...We know, W= F× SForce and Displacement, both are vector quantity then why Work is called as Scalar Quantity?Please tellAnd note:- NO SPAM otherwise...... |
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Answer» Answer: because WORK is a Scalar PRODUCT of TWO Vectors. Explanation: I have attached a handwritten Note for explaination. Generally type written ones are COPY from Net , which Brainly App doesn't Care for ! thanks , Happy learning. |
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| 36. |
The unit vector parallel to the resultant of the vectors A = 4 + 3) + ok andB = _{ +39 - 8k is--+(A) (3 +69 – 22(B) 7 (3+63 ++2)(c) (3i +63 – 22)(D) 1 (4 - 69 + 2k(48 6j 249 |
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Answer» Answer: this is the BES answer in the world in the nation |
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| 37. |
Velocity of a particle is given by v=(3tsquare + 2t)m/s.find it's average velocity between t=0 to t=35 and also find its acceleration at t=3s.Motion of the particle is in one dimension |
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| 38. |
Given two vectors Ā = î - 29 – 3k and B = 4î – 29 +6. The angle made by (A + B) with the X-axis is(A) 300(B) 45°(C) 60°(D) 90° |
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Answer» C Explanation: USE A.B =AbCos thetaCos =A.B/AB |
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| 39. |
A physical quantity P is related to four other physical quantities a, b, c and d as P - a³b²c^1/2/d. The percentageerror in the measurement of a, b, c and d are 1%, 2%, 2% and 1% respectively. Find maximum percentage error in quantity P.*WITH PROPER SOLUTION PLEASE*NO IRRELEVANT ANSWERS! |
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Answer» this SIMPLE QUESTION you can solve it by applying MERA llxnd |
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| 40. |
Match the following( )1 Copper & Hydrogen- copper oxide (A) reduction(2) copper oxide + hydrogen --- copper +water (B) oxidation. (3) lead oxide + carbon ---- lead + carbon dioxide (c) redoxoxidation A 1_b, 2-a 3-c B 1-a,2-b3-cC 1-c 2-d 3-a d 1-c 2-a 3-b |
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Answer» Explanation: c no. will be your answer |
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| 41. |
6. Identify the correct sentence related to cell theory.1 Schleiden and Schwann together proposed the cell theory.II. All living organisms are composed of cells and products of cells.III. All cells arise from pre-existing cells.A) I and II onlyB) I and III onlyD) I, II and IIIC) II only |
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Answer» I and III only |
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| 42. |
N molecules of a gas have speeds 1, 2, 3.... N m/s respectively. The ratio of rms speed to average speed is(A)2N+1N+1(B)2(2N+1)V 3(N+1)(C)3(N+1)V 2(2N+1)(D)3(N+1)(2N+1) |
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| 43. |
A ratio of masses of two planets is 2:3 and the ratio of their radii is 4:7.find the ratio of their acceleration due to gravity |
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Answer» Answer: 49:24 Explanation: |
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| 44. |
Question No. 133The gas molecules having highest rms speed is(A) Hydrogen(B) Helium(C) Carbon dioxide(D) Oxygen |
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Answer» Hudrogen Explanation: |
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| 45. |
If angle between a and 5 is then3angle. Between 2a and - 36 is.(A)3(B)2A3(C)6(D)523 |
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Answer» sooryjjwjwjwjsjejejejwjhshw |
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| 46. |
A 100μF capacitor is connected across 220V, 50 Hz source. Calculate the reactance offered by thecapacitor at fundamental and 140 Hz frequency, maximum current in the circuit, the average and r.m.s. value of the current drawn by the capacitor |
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Answer» HII I am AYUSH PLEASE TELL me thank you Explanation: then I will tell the answer |
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| 47. |
The average thermal energy of oxygen at atemperature of 27°C is(A) 6.2 X 1021J(B) 4.5 x 10-21 J(C) 3.5 x 10217N(D) 1.2 x 10 21 J |
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Answer» The answer is a OPTION C Mark me BRAINLIEST |
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| 48. |
Which of the following is a vector quantity?massvelocityspeedtemperature |
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| 49. |
Which physical quantity can be negetive.(a) electric potential(b) electric flux(c) electric charge |
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Answer» Answer: electric FLUX is a negative quantity because it is VECTOR in nature |
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| 50. |
A ball of mass m is released under the gravitational force from point A onfrictionless surface in vacuum as shown in above figure. What is the accelerationof ball between point B and C? Justify. |
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Answer» ZERO ACCELERATION is the right answer HOPE it's help YOu |
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