Explore topic-wise InterviewSolutions in Current Affairs.

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.

Ocean thermal energy​

Answer»

ANSWER:

what is QUESTION BRO or SIS?
Discussion
2.

The diameter if a soap bubble is 5cm.The excess pressure inside the bubble is 2bar.Find the surface tension of the surface film of the bubble.

Answer»

\mathtt{\huge\fbox{Solution :}}

Given,

  • Diameter of soap bubble = 5 cm

So, radius of soap bubble = 2.5 cm = 0.025 m

The excess pressure inside the bubble = 2 bar

We know that, the excess pressure inside the bubble is given by

\large{\mathtt{ \underline{\fbox{p_{i} -p _{o} = \frac{2t}{r} }}}}

Where,

  • (Pi - PO) is excess pressure inside the soap bubble
  • t is the surface tension
  • r is the radius of soap bubble

Substitute the known values , we get

\sf \mapsto2 = \frac{2t}{0.025} \\ \\\sf \mapsto t = 0.025 \: newton \: per \: meter

HENCE, the surface tension is 0.025 newton/meter
Discussion
3.

Why iron filings arrange themselves in closed loops around a bar magnet

Answer»

ANSWER:

because of the magnetic FIELD limes produced by BAR magnet which exerts magnetic force.

-Mr. MASK
Discussion
4.

47. Define work and nature of work done in various situations​

Answer»

Answer:

WORK is to do something which needs physical or mental effort, in order to earn money or to ACHIEVE something. The nature of an employee's work is best DEFINED as the TYPE of work that he does. ... The nature of this work may be summed up in the employee's title. For example, a human resources manager is someone who manages a human resources department and performs all of the TASKS required of such a position.
Discussion
5.

a charged drinking plastic straw is brought near another suspended plastic straw that is (a) similarly charged (b) uncharged explain what we would observe in each case and why ​

Answer»

When it is brought near a similarly CHARGED STRAW they repel each other bcoz same charged BODIES repel each other.

When it is brought near a uncharged straw they will attract each other bcoz DIFFERENT charged bodies attract each other.
Discussion
6.

Pls tell me the correct relation and equation used for this question! ​

Answer»

=> Correct answer is B) 1:3
Discussion
7.

Define the word barren ....​

Answer»

Answer:

Barren is an Adjective.

It means not producing or incapable of producing offspring; sterile: a barren WOMAN. unproductive; unfruitful: barren LAND. without capacity to interest or attract: a barren period in American architecture.

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Discussion
8.

3. What is the work done to increase the velocity of a car from rest to 80 km/h if the weight of the car is 200N?

Answer»

ANSWER:

W=F×D = 200 × d

v^2=u^2+2gs

s=v^2-u^2/2g

Putting values by converting 80 km/ h to m/s

s=(22.22)^2 - 0 /2 ×10= 24.7 m

Putting values in W

w= 200×24.7 =4940 J(APPROX

If you LIKE my answer Please MARK me as brainliest. . . . .

Discussion
9.

From a rifle of mass 8 kg bullet of mass 80 gram is fired with a velocity of 40 metre per second calculate the recoil velocity of the rifle.​

Answer»

Answer:

0•4

Explanation:

MV=MV

8×v=0•08×40

v= 0•4
Discussion
10.

What is the final momentum of the ball 'm', moving with the velocity 'v' after striking the wall? ​

Answer»

ANSWER:

MOMENTUM = MASS *VELOCITY, so the momentum =MV

Discussion
11.

Why is the chemical formula for water h2o and for nacl why not ho2 and nacl2

Answer»

Answer:

because we use CRISS cross method in WRITING formulae of compounds in which the valency is INTERCHANGED between the two molecules

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Discussion
12.

Two pendulums P and Q have equal lengths but their bobs weigh 10gf and 20gfrespectively. (i) Compare their time periods.(ii) Give a reason for your answer.Plz help

Answer»

Answer:

Given:

Length of Pendulum P and Q is same.

Weight of the Bob is given as follows:

  • P = 10 gf
  • Q = 20 gf

To find:

Ratio of time periods

Concept:

Time period of pendulum is given as :

t = 2\pi \sqrt{ \dfrac{<klux>L</klux>}{g} }

As per the Equation, for a CONSTANT gravitational ACCELERATION, the time period is only DEPENDENT on length of Pendulum.

Calculation:

Let l1 = l2 = l (as per the QUESTION)

Time period for Pendulum P

\therefore \: t1 = 2\pi \sqrt{ \dfrac{l1}{g} } \\ = > t1 = 2\pi \sqrt{ \dfrac{l}{g} }

Time period for Pendulum Q:

\therefore \: t2 = 2\pi \sqrt{ \dfrac{l2}{g} } \\ = > t2 = 2\pi \sqrt{ \dfrac{l}{g} }

So the time period of both the pendulum is same.

\boxed{ \red{ \therefore \: t1 = t2}}
Discussion
13.

Physical quantities that have no units

Answer»

ANSWER:

Mechanical advantage

velocity RATIO

EFFICIENCY

Explanation:

basically that's all I know friend
Discussion
14.

Advantages andOF concave. convexdisadvantagesmirrors.​

Answer»

Answer:

concave mirror is USED by ENT doctors

CONVEX mirror are used as REAR VIEW mirror in bikes
Discussion
15.

❤.State three laws of motion show that the first law of motion gives the definition of force and the second law of motion give the measure of force.​

Answer»

Answer:

Newton's First Law

As per first law of motion we know that the object will continue in its STATE of motion or state of REST until some external unbalanced force acts upon it

It is also known as law of inertia so the object will NEITHER change its speed not it will change in its direction until some unbalanced force acts upon it

Newton's Second Law

As per 2nd law we know that rate of change in momentum of the object is net force on the object

So we know that momentum of object is given as

P = mv

so net force on the object is given as

F = \frac{dP}{dt}

Newton's Third law

As per Newton's III law for every action there is equal and opposite reaction force. So all forces will ACT in pairs and for all action forces we will get same magnitude and opposite direction reaction force
Discussion
16.

Seliul-A Teocm me1Multiple choice questionsSolar constant may be defined as the amount of solar energ received per cm' per minute. The dimensions of solarconstant is​

Answer»

EXPLANATION:

SORRY I don't KNOW the ANSWER

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Discussion
17.

You find mass to be 51kg on weighting machine . Is your mass more or less than 51kg?​

Answer»

a weighing measures the weight of a body and iscalibrated to indicate mass. when we STAND on a weighing machine, our weight ACTS downwards while up thrust due to air acts UPWARDS. as a RESULT, our apparent weight becomes less than the true weight. the weighing machine measures this apparent weight and hence the mass indicated by it is less than the actual mass. our actual mass will be more than 51kg.
Discussion
18.

What is current transformer​

Answer»

Answer:

Explanation:

A current transformer is a type of transformer that is USED to reduce or multiply an ALTERNATING current. It produces a current in its secondary which is PROPORTIONAL to the current in its PRIMARY. Current transformers, ALONG with voltage or potential transformers, are instrument transformers.

Discussion
19.

Advantages and disadvantagesOF concave mirros​

Answer»

Disadvantages of CONCAVE mirrors:

1. If the object is placed between "P and F", it forms "real and inverted" images.

2. A concave mirror has lesser FIELD view so cannot be used as security mirrors or rear-view mirrors.

3. Based on object position, it forms either magnified or diminished image."

ADVANTAGES:

LARGE concave mirrors are used to focus sunlight to produce heat in the solar furnace. They are also used in solar ovens to collect a large amount of solar energy in the focus of the concave mirror for heating, cooking, melting METALS, etc. These were some COMMON uses of the concave mirror in daily life.
Discussion
20.

the value of g on the surface of the Moonis the same as on it the earth be is less than that on the earth sea is more than that on the earth the changing table today ​

Answer»

ANSWER:

I can't UNDERSTAND your QUESTION

Discussion
21.

A book of mass 1kg is on a table If a force of 3N is applied tangentially along the planeof a table, the book tends to move. Calculate the coefficient of static friction between thetable and book.

Answer»

Answer:

1000n

Explanation:

1kg=1000g

nsbwhwjwnsnksjsbsnshsjssn
Discussion
22.

Properties and uses of and graphite

Answer»

Answer:

GRAPHITE is a soft grayish-black greasy substance.

Explanation:

PROPERTIES OF GRAPHITE:

Graphite has following properties.

1)Graphite is soft, slippery, grayish-black substance.It has metallic luster and is opaque to light.

2)Specific gravity of graphite is 2.3.

3)Graphite is a good conductor of heat and electricity.

4)Chemically, graphite is slightly more reactive than diamond.

USES OF GRAPHITE:

The important uses of GRAPHIE are as follows.

1)The major use of graphite is in making lead PENCILS of different hardness, by mixing it ith different proportions of clay.

2)Due to its slippery nature, graphite is used as dry lubricant in machine parts.

3)The PRESENCE of free electrons makes graphite a good conductor of electricity and it is used to make electrodes.

4)Graphite has the ability to absorb fast-moving neutrons, thus, it is used in nuclear reactors to control the speed of the nuclear fission reaction.
Discussion
23.

We can also called it a jovian planet because of its is the largest planet

Answer»

ANSWER:

JUPITAR is that PLANET
Discussion
24.

Which of the following pair of elements is liquid at roomtemperatureMercury, ethyl alcohol b) Bromine, lodineC/ Bromine, Water d) Bromine. Mercury​

Answer»

Answer:

d .bromine and MERCURY are LIQUID at the ROOM temperature

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Discussion
25.

Nucleus of an atom isa) neutralc) negatively chargedb) positively chargedd) None of these​

Answer»

\huge {\red{\boxed{ \overline{ \underline{ \mid\mathfrak{An}{\mathrm{sw}{ \sf{er}} \colon\mid}}}}}}

Question : Nucleus of ATOM is

  1. Neutral
  2. Negatively charged
  3. Positively Charged
  4. None of these

Answer :

3) Answer is b positively charged.

________________________________

Additional Information

• In an atom electrons (negative) revolves around the nucleus, where as neutrons (no charge) and protons (positive charge) are CONTAINED in nucleus .

• So, the charge on the nucleus is positive charged.

Discovery of Neutrons

As now a days we come to know that neutron doesn't have any charge this theory was purposed by Rutherford.

He discovered it in his gold FOIL invention.

He took a gold foil and he passed α - rays from it , most of them (rays) passed easily, but some of them changed their path. And only few of them bounce back. So, he comes to know that is SOMETHING heavier in the atom and it have positive charge. So, he comes to know that heavy particle is Nucleus and it contains electron and a null charged particle, he CALLED it as Neutrons .
Discussion
26.

derive an expression for the excess pressure inside a spherical soap bubble of radius r and surface tension S.​

Answer»

Hope this answer HELPS PLZ MARK as brainliest.

Discussion
27.

what will be the kinetic energy of a moving body of mass'm' and velocity 'v' if its speed increases twice?​

Answer»

Answer:

4 times

Explanation:

Kinetic energy = 1/2 m V^2

If speed INCREASES twice, v = 2V

Then kinetic energy = 1/2 m (2v)^2

= 1/2 m 4 v^2

This BECOME 4 times the actual kinetic energy.

HOPE THIS HELPS YOU..........
Discussion
28.

Find net magnetic field at point P (L = 10 cm)SA1/2 U2(1) 5.23 x 10-5 T(2) 2.23 x 10-5 T(3) 2.23 T(4) None​

Answer»

ANSWER:

SEARCH in GOOGLE it is HELPFUL for you

Discussion
29.

where is water available in Sahara ? why Sahara is desert? why is camel called the ship of desert ????​

Answer»

EXPLANATION:

Hi✌️✌️

The Sahara has only two permanent rivers and a handful of lakes, but it has substantial underground reservoirs, or aquifers. Its permanent rivers are the Nile and the Niger. The Nile rises in CENTRAL Africa, SOUTH of the Sahara, and flows northward through Sudan and Egypt and empties into the Mediterranean.

The Sahara, the world's largest desert, was once fertile grassland. ... The widely-held belief is that the Sahara dried up due to a change in the Earth's orbit, which affects solar insolation, or the amount of electromagnetic energy the Earth receives from the Sun.

The Sahara, the world's largest desert, was once fertile grassland. ... The widely-held belief is that the Sahara dried up due to a change in the Earth's orbit, which affects solar insolation, or the amount of electromagnetic energy the Earth receives from the Sun.CAMEL is called the "Ship of Desert" because it is the only mean of transportation found in deserts which helps human being go from one place to another easily in the desert.It has humps which help it to survive LONG dry periods without water. ... Beacuse of its many adaptations,camel is called the "Ship of Desert".

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Discussion
30.

A ball thrown vertically upwards returns to the thrower in 20 second. Calculate thevelocity with which it was thrown and the maximum height attained by the ball. Take g = 10 m/s2​

Answer»

ANSWER:

s = 1/2 × 10 × 20 × 20

s = 5 ×400

s = 2000m

v = 10 × 20

v = 200

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Discussion
31.

What is resistance of carbon resistor containing blue red silver and gold color band ¿

Answer»

Answer:

Resistors COME in many shapes and sizes.

Explanation:

INPUTS:

1ST DIGIT    2ND DIGIT.    MULTIPLIER.   TOLERANCE.

                                   BLUE

6.                       6                       *1M                +-0.5%

                                    RED

2                        2                        *100.               +-2%

                                   SILVER

                                                    /10                  +-5%

                                     GOLD

                                                     /100                +-10%

(* MEANS MULTIPLY)

(/ MEANS DIVIDE)
Discussion
32.

What is resistance of carbon resistor contain blue red silver and gold color band

Answer»

ANSWER:

A carbon resistor is marked in COLORED bands ofred, black, orange and silver. So, the VALUE of theresistance is 20,000 Ω with 10% TOLERANCE.
Discussion
33.

Light of wavelength 6328 A is incident normally on a slit having a width of 0.2 mm. The width of the central maximum measured from minimum to minimum of diffraction pattern on a screen 9 m away will be nearly(1) 0.36 degree(3) 0.72 degree(2) 0.18 degree(4) 0.09 degree​

Answer»

ANSWER:

.72 degree

Explanation:

ggfdfgyyfbjj
Discussion
34.

A person moving in a car with a velocity of 36 kmph away from a large wall blows a horn. If he hears echo after 6sec, the distance of wall from him when he blows horn ______(Velocity of sound 340 m/s)

Answer»
Discussion
35.

A projectile is fired with a velocity u making an angle theta with the horizontal. Derive an expression for a) maximum height b) time of flight c) horizontal range d)maximum horizontal range

Answer»

\huge{\sf{Projectile }}

A parabolic projectilon MAKING a maximum ANGLE of 45° with respect to the horizontal FRAME

\boxed{\setlength{\unitlength}{1 cm}\thicklines\begin{picture}(6.65,3.2) \put(0.3,1){\line(1,0){6}} \qbezier(0.3,1)(3,3)(6.3,1)\put(0.3,1){\<klux>VECTOR</klux>(1,1){1}} \qbezier(0.5,1.2)(0.65,1,1)(0.6,1)\put(0.77,1.065){$\theta$}\put(0.5,1.8){u}\put(3.15,1.5){\vector(0,1){0.5}}\put(3.15,1.5){\vector(0,-1){0.5}}\put(3.3,1.4){H}\put(4.3,0.7){\vector(-1,0){4}}\put(4.3,0.7){\vector(1,0){2}}\put(3.3,0.3){R}\end{picture}}

The initial velocity of the projectile is u and angle with the x - axis is ∅

  • Velocity of a projectlie along X axis is u cos∅

  • Velocity along Y - axis is u sin∅

Maximum Height

  • The final velocity vector along y axis TENDS to zero

  1. Maximum distance covered along y axis

From,

\sf \: { {v}^{2} }_{y} - { {u}^{2} }_{y} = 2( - g)h \\ \\ \longrightarrow \: \sf{ - u {}^{2} \sin( \theta) {}^{2} = - 2gh} \\ \\ \longrightarrow \: \sf \: 2h = \frac{ {u}^{2} \sin {}^{2} ( \theta) }{g} \\ \\ \longrightarrow \: \boxed{ \boxed{ \sf{h = \dfrac{ {u}^{2} {sin}^{2} \theta }{g} }}}

Time of Flight

  • Total time interval which involves the time of ascent and time of descent of a projectile

\sf T_f = t_a + t_d

Consider s = ut + 1/2at²

Since,

The projectile starts from the ground and returns to the ground,the vertical displacement is zero » s = 0 m

\sf{0 = uT + \dfrac{1}{2}( - g) {T}^{2} } \\ \\ \longrightarrow \: \sf \: uT = \dfrac{1}{2} g {T}^{2} \\ \\ \longrightarrow \: \sf \: 2u \sin( \theta) = gT \\ \\ \longrightarrow \: \boxed{ \boxed{ \sf{T = \dfrac{2u \sin( \theta) }{g}}}}

Time of ascent and Time of Descent would be u sin∅/g

Range

  • Horizontal displacement of a projectlie (along X axis )

\sf{speed = \dfrac{distance}{time} } \\ \\ \longmapsto \: \sf{u \cos( \theta) \times \dfrac{2u \: \sin( \theta) }{g} = R} \\ \\ \longmapsto \: \sf \: R = \dfrac{ {u}^{2} }{g} \times 2 \sin( \theta) \cos( \theta) \\ \\ \longmapsto \: \boxed{ \boxed{ \sf{R = \dfrac{ {u}^{2} \sin(2 \theta) }{g} }}}

For maximum range,∅ = 45°

\longmapsto \: \boxed{ \boxed{ \sf { R = \dfrac{ {u}^{2} }{g} }}}
Discussion
36.

By using Stokes Law, derive an expression of terminal velocity. On what factors it depends?​

Answer»

Explanation:

hope so HELPED you please MARK brainliest answer and THANK me for my WORK
Discussion
37.

What happens to the evaporation if temperature of the liquid increases?

Answer»

Answer:

it evaporates at a GREAT speed.

Explanation:

because evaporation is CAUSED DUE to the INCREASE in TEMPERATURE.so when temperature increases evaporation increases

Discussion
38.

Acceleration produced by a force 12 n exerted on an object of mass 3 kg?

Answer»

Answer:

4ms-2....... ..............
Discussion
39.

Is it possible the torque and force to act in same direction? Justify your answer.​

Answer»

Answer:

Torque is a measure of the force that can CAUSE an object to rotate about an AXIS. Just as force is what causes an object to ACCELERATE in LINEAR kinematics, torque is what causes an object to acquire angular ACCELERATION. The direction of the torque vector depends on the direction of the force on the axis.
Discussion
40.

| তড়িৎচুম্বকীয় আবেশ 36L= 400 mH আবেশাঙ্কবিশিষ্ট একটি ।আবেশক, R = 22, R, = 22 রােধবিশিষ্ট ELদুটি রােধক এবং 12vতড়িৎচালকবলবিশিষ্ট।একটি তড়িৎকোশের সঙ্গে চিত্রানুযায়ী যুক্ত .আছে। তড়িৎকোশটির অভ্যন্তরীণ রােধনগণ্য। t = 0 সময়ে সুইচ s বন্ধ থাকে।ময়ের (t) অপেক্ষকরূপে L-এর প্রান্তেভবপার্থক্য হলwmllllll- 12 25t​

Answer»

HINDI ya ENGLISH mai LIKH le mere yarr
Discussion
41.

What is the relationship between media and democracy ????​

Answer»

Answer:

MEDIA give NEWS to DEMOCRACY and democracy SUPPORT him
Discussion
42.

- তড়িচালক বল কত হবে?কেবলমাত্র একটি সঠিক ৮একটি সঠিক উত্তরধর্মী প্রশ্ন (Only One Correct[প্রশ্নমান-2]Answer Type Question)প্রতিটি 27 cm ব্যাসার্ধবিশিষ্ট দুটি- বাসার্ধবিশিষ্ট দুটি সমকেন্দ্রিক বৃত্তাকার কুণ্ডলীসম্পরের সঙ্গে সমকোণে রাখা আছে। এদের মধ্য দিয়ে যথাক্র= A ও 4 A তড়িৎ প্রবাহিত হলে, কুণ্ডলীর কেন্দ্রে চৌম্বক আবেশেপান Wbm এককে কত হবে?) 5 x 10- T(b) 7 x 10-5T) 12x10- T(d) 10-5 T (AIEEE 20​

Answer»

O bhaiya yarr HINDI ya ENGLISH mai likh le
Discussion
43.

It is said that media set the agenda. what do you mean by the statement ????​

Answer»

Answer:

Agenda-setting is the CREATION of public AWARENESS and concern of salient issues by the news media. ... The study of agenda-setting describes the way media attempts to INFLUENCE VIEWERS, and establish a hierarchy of news prevalence. NATIONS with more political power receive higher media exposure.
Discussion
44.

Why are media considered important in a democracy????​

Answer»

ANSWER: MEDIA plays an important role in a democracy. It provides news and discusses events taking place in the country and the world. It is on the basis of this information that we LEARN how the government works. Media also CRITICISES the unpopular POLICIES and programmes that the government takes.

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Discussion
45.

Explore the relationship between advertising and democracy .​

Answer»

Explanation:

There is very close relationship between advertising and democracy. Media helps to prepare CULTURAL and POLITICAL DIVERSITY in the country. Advertising also communicates the policies and politics of the government to the society so that the citizens can MAKE their opinion about the policies and IDEAS of the government.
Discussion
46.

Certain markets are invisible . COMMENT .(LONG ANSWER PLEASE ) ​

Answer»

Answer:

The unobservable market FORCE that helps the demand and supply of goods in a FREE market to REACH equilibrium automatically is the invisible hand. ... He ASSUMED that an economy can work well in a free market scenario where everyone will work for his/her own INTEREST.
Discussion
47.

There is a whole lot of inequality both among buyers and sellers . EXPLAINplease don't spam !!!!​

Answer»

Answer:

There are different kinds of buyers and SELLERS. In the case of sellers, one sells his goods in the weekly market while the other sells his goods in a large mall. ... In the case of buyers, the rich people are busy SHOPPING in malls while the poor cannot meet EVEN there day to day needs. So here too is inequality.
Discussion
48.

, এl, ২| এফ এম আ৮ তম বলের রাশিমালাটি নির্ণয়বাশমালাটি নির্ণয় করাে। 1-2.Jযঅথক্স, r’ ব্যাসার্ধের একটি বৃত্তাকার কক্ষে “q' আধান ঘুরছে। আধানটির কমসকত কত তম আনটির কম্পাঙ্ক 'n' হলে।নির্ণয় করাে– (a) কক্ষীয় প্রবাহমাত্রা (b) কেন্দ্রে চৌম্বক আবেশ (c) চৌম্বক ভs.​

Answer»

ANSWER:

BRO WRITE in HINDI or ENGLISH so we can understand

Explanation:
Discussion
49.

A thin rod of uniform density has length 0.1m and mass 120gm . Find its M.I. adout the transverse axis passing through its centre of mass

Answer»

The moment of INERTIA about the transverse axis = 0.000025 Kg m²

Length of the rod = L = 0.1 m

MASS of the rod = 120 gm = m = 0.12 Kg

The CENTER of mass of the uniform density rod will be the midpoint of the rod .

The moment of inertia about the transverse axis passing through its centre of mass = M(l/2)² / 12

= 0.12 × (0.05)²/12

= 0.000025 Kg m²
Discussion
50.

How Jal-Taran Produce Sounds?​

Answer»

Answer:

Jal Tarang which literally means waves in water is a percussion music instrument which was developed in India around 17th CENTURY. It consists of MULTIPLE open POTS of water of various sizes which when STUCK at the edges produce sound. This vibration when transferred to surrounding AIR produces a sweetsound.
Discussion