Explore topic-wise InterviewSolutions in Current Affairs.

Correct option is (A) Ceiling on credit

Banks undertake activities to mobilize peoples’ money in order to make profit. 

Correct option is (A) Reverse repo rate

Correct option is (B) Marginal standing facility

Correct option is (C) Bank rate

Correct option is (A) Cheap money policy

1. You will see that some water flows out of the tumbler and collects in the bowl. Remove the stone from the tumble. The level of water in the tumbler comes down.

Now, pour the water collected in the bowl back into the tumbler. The glass tumbler is filled again. This is because the stone occupied space and therefore drives the water out of the tumbler. This proves that not only solids but liquids also occupy space.

2. Take two similar balloons and inflate them equally. Suspend one balloon to the left of a metre scale and the other one to the right of it, as shown in the figure below. Balance the scale in the middle with the help of a peg.

Two conditions are : change in

1. Temperature

2. Pressure

The process by which matter changes from one state to another and back to original state, without any change in its chemical composition.

(d) the information is insufficient to decide the relation of x_A with x_B.

Explanation:

Magnitude of displacement depends up on initial velocity, time Duration and acceleration. In this case only time is known while magnitude of initial velocity and acceleration is unknown. These two displacements could only be comparable if directions of initial velocity and acceleration had been the same. Since in this case directions are opposite, their magnitudes need to be known, So there is not sufficient information.

Substances that can flow are called fluids, e.g. gases (oxygen, hydrogen), liquids (water, petrol, sulphuric acid).

Due to a lack of capital, poor farmers were unable to grow exportable crops. They were forced to sell their land or take extreme steps. Thus, they faced the problem of indebtedness and poverty.

Classical and Neoclassical liberalism is contributed to the concept of negative liberty

(a) yes, If you multiply (-1.5) to A you get B => B= -1.5A 

(b) But that doesn’t mean -1.5 = B/A, Because division of a vector with another vector is not defined.

Gas constant

R = C_p − C_v

= (C_p − C_v) + (ΔC_p − ΔC_v)

= (12.28 – 3.97) ± (0.2 + 0.3)

= (8.31 ± 0.5) units.

The sentry saw the potter galloping towards the camp with a tree in one hand and his reins in the other. The sentry thought that he must be the General who had captured a tiger with his bare hands. Hence the sentry felt that the potter was a giant.

The most humorous and thrilling incident in the story is the potter’s catching the tiger. One day he drank more wine after a hard day’s work. Then the storm began and he remembered that he had left his donkey tied under a tree. He searched for it and finally found a sleeping tiger under thatched roof of a hut and thought that it was his donkey. As he was drunk, he couldn’t find the difference between a tiger and a donkey. The incident of his riding the tiger is the most humorous and thrilling incident. The writer created humour by creating situations where the tiger took the word ‘leak’ to be ‘a more powerful and dangerous thing’, the potter didn’t notice the difference between his donkey and the tiger, the potter’s riding the tiger and people mistook the potter to be a brave man. All these things made the incident humorous and thrilling.

The king of the potter’s country gathered a large army when the war broke out between their country and a much stronger neighbour. But the king realized that it was not strong enough to save his country from defeat. So, he searched for a hero to lead his army. When he asked his ministers’ advice, one of them told him about the brave potter who had captured a tiger with his bare hands. The king sent for him and the potter went with his wife to the capital. The king was pleased to see him and ordered him to lead the army into battle the next day.

When the storm began, the drunken potter suddenly remembered that he had left his donkey tied under a tree. He rushed out of his hut to take the animal into the stable but the donkey was not there. This made the potter angry. The potter walked through the wet forest searching for the animal. It became dark and he often stumbled over roots and fallen branches. Each step of the potter made him angrier.

A thermometer bulb should have small heat capacity. In case, it has large thermal capacity, the temperature of the substance will get lowered due to the large amount of heat absorbed by the thermometer bulb.

The thermometer having cylindrical bulb will respond fastly to the temperature. For same volume a sphere has least surface area. The surface area of cylindrical bulb will be more than that of the spherical bulb. More heat will be transmitted to mercury through cylindrical bulb surface. It will respond quickly to the temperature.

Distance of the earth from the Sun = b = 1/2 × diameter of earth’s orbit

⇒ b = 0.5 × 3 × 10¹¹ m

b = 1.5 × 10¹¹ m

1 parsec = D = b/θ

= (1.5 x 10¹¹ m)/1¹¹ = ((1.5 x 10¹¹)/(1/3600))

= ((1.5 x 10¹¹)/((1/3600) x (π/180))= 3 × 10¹⁶ m

Angle of dip (90°) is maximum at magnetic poles.

The correct answer is (a) ∆l/l

Explanation: 

When a metal wire is stretched by a load the fractional change in the transverse length is proportional to the fractional change in the longitudinal length. i.e.,

 Δd/d = σ*Δl/l, where σ is the Poisson's ratio. 

Let the original cross-sectional area =A and final area a. 

Change in volume ΔV = a*Δl and the original volume V =Al 

Hence the fractional change in the volume  

ΔV/V = a*Δl/Al = (a/A)*(Δl/l) =(d'²/d²)(Δl/l) 

={(d-Δd)²/d²}(Δl/l) ={(d²-2d*Δd)/d²}(Δl/l)  

[taking Δd² negligible] 

So, ΔV/V = {1-2*Δd/d}(Δl/l) 

={1-2* σ*(Δl/l)}*(Δl/l) 

=Δl/l - 2σΔl²/l² 

→ΔV/V = Δl/l {Taking Δl² negligible} 

Hence the option (a).

The correct answer is (a) ∆l/l

Explanation: 

When a metal wire is stretched by a load the fractional change in the transverse length is proportional to the fractional change in the longitudinal length. i.e.,

 Δd/d = σ*Δl/l, where σ is the Poisson's ratio. 

Let the original cross-sectional area =A and final area a. 

Change in volume ΔV = a*Δl and the original volume V =Al 

Hence the fractional change in the volume  

ΔV/V = a*Δl/Al = (a/A)*(Δl/l) =(d'²/d²)(Δl/l) 

={(d-Δd)²/d²}(Δl/l) ={(d²-2d*Δd)/d²}(Δl/l)  

[taking Δd² negligible] 

So, ΔV/V = {1-2*Δd/d}(Δl/l) 

={1-2* σ*(Δl/l)}*(Δl/l) 

=Δl/l - 2σΔl²/l² 

→ΔV/V = Δl/l {Taking Δl² negligible} 

Hence the option (a).

(c) find different type of molecules in their range of influence

(d) feel a net force in one direction.

Explanation: 

The surface molecules are neither smaller than other molecules nor acquire charge due to collision from air molecules. 

The surface molecules have similar molecules on one side while different molecules on the other side. Due to this, they feel a net force in one direction. Hence the options (c) and (d).

 (a) Length of the cylinder L = 2 m 

Area of cross-section A =πr² =π(2/100)² m² =4π/10000 m² 

Force on the cylinder F = 100*10 N =1000 N 

Hence the stress =F/A =1000/(4π/10000) N/m² 

=(1/4π)*10⁷ N/m² 

=0.0796 x10⁷ N/m² 

=7.96 x10⁵ N/m²  

(b) Strain = Stress/Y =(F/A)/Y 

={7.96 x10⁵}/2.0 x10¹¹ 

=3.98 x10⁻⁶ ≈4 x10⁻⁶  

(c) Let the compression of the cylinder = l m 

The strain =l/L = l/2  

→4 x10⁻⁶ =l/2

 →l =8 x10⁻⁶ m

ρ= stress = mg/A

e = strain = ρ/Y
Compression ΔL = eL

All are correct

Explanation: 

It is clear from the graph that the quantity along one axis is directly proportional to the quantity along another axis. We know that stress/strain = Y (constant) 

→W/A = Y*l/L 

→W =(YA/L)*l 

For a given wire, cross-sectional area A and the length L is constant. 

Hence  

W = K*l {where YA/L =K, a constant} 

→W∝l 

i.e. the weight hung is proportional to the length increased. So the option (a) is true.  

If we write the expression as W/A = (Y/L)*l 

→stress ∝ length increased {where Y/L is another constant} 

Hence the option (b) is true.  

Since the stress is directly proportional to the strain developed and the constant of proportionality is Young's modulus of elasticity. Hence the option (c) is correct.  

It is the same case of option (a) simply the axes have been changed. Which is also true. Hence the option (d) is true.  

Thus all options are true.

(c) find different type of molecules in their range of influence

(d) feel a net force in one direction.

Explanation: 

The surface molecules are neither smaller than other molecules nor acquire charge due to collision from air molecules. 

The surface molecules have similar molecules on one side while different molecules on the other side. Due to this, they feel a net force in one direction. Hence the options (c) and (d).

The correct answer is (b) B

Explanation:

 When the ball falls in the long column of viscous liquid, it starts with zero speed and with a certain acceleration. As time passes its acceleration decreases with time.    

 In the speed time graph, the speed is zero at t = 0 only in graph A and B. The slope of the speed-time graph gives the acceleration. The slope of A is constant, that means the acceleration is constant which is not the case here.  The slope of the graph B decreases with time i.e. the acceleration decreases with time. Thus the motion of the ball is best represented by graph B.

The weight of an elephant is so much that, to bring the stress on the bones under permissible limit the cross-sectional areas of the bones are increased by nature because of stress =Force/area. So the bones of an elephant are thicker than proportionate.

If the height is H and the increase in height/length is h due to pulling then the strain =h/H. If it is 1% then h/H = 1/100 

→h = H/100 

If the height H = 180 cm (say) then the increase in length h = 1.80 cm.  

Since our body has joints which are weaker than the bones so this increase in length will be located to the weakest joint. Any joint having 1.80 cm separation will be much damaging. So the yield point (or the bearable pain) due to pulling will be much less than 1%.

The energy of shock due to vibration absorbed by the rubber sheets is converted to heat. It is also due to a property of rubber which is called "elastic hysteresis".  

Correct option (a) electromagnetic

Explanation: 

The force of viscosity is due to the contact of the molecules like in friction. So it is an electromagnetic force. 

The cloth is made of fine fibers and the spaces between the fine fibers act as capillary tubes. We know that when the angle of contact between the water and the side of the capillary tube is less than 90°, the water level in the tube rises. On the other hand, if the angle is more than 90°, the level of water in the tube goes down. In the case of water and the cloth, the angle of contact is nearly zero, so the water goes readily inside to wet it. The angle of contact between the water and the wax is about 107°. So when some wax is rubbed on the cloth, the water first comes in contact with the wax and the angle of contact being more than 90° it does not enter the cloth. So the cloth becomes waterproof.

ML^-1T^-2 is the dimensional formula for pressure.

Viscosity of gases increases as the temperature is increased.

When the fluid is kept in a container the molecules of a fluid are in random motion due to their thermal velocities and they are constantly colliding with the walls of the container and rebounding from them.

Correct Option is (A) = 9

Given,

\(r_1 = R\)

\(r_2 = \frac{R}{3}\)

The terminal velocity \(v = \frac{2}{9} \frac{r^2 (\rho - \sigma)g}{\eta}\)

where, 

r = radius of falling body

\(\eta\) = cofficient of viscosity

g = gravity constant

\(\rho\) = density of the falling body

\(\sigma\) = density of fluid

\(v_1 \propto r^2\)

\(\frac{v_1}{v_2} = \frac{r_1{^2}}{r_2{^2}}\)

\(\frac{v_1}{v_2} \frac{R^2}{\left(\frac{R}{3}\right)^2}\)

\(\frac{v_1}{v_2} = \frac{9R^2}{R^2}\)

\(\frac{v_1}{v_2} = \frac{9}{1}\) \(\Rightarrow 9\) 

Correct option is (A) 9

The coefficient of viscosity of liquids decreases as temperature is increased.

“Why God made Teachers” was the poem Written by kevin William Huff. In this poem he describes the topic in very simple way. God is unable to come and teach all the people so he created the teachers as man’s best friend. Teachers explain the difficult things and make him understand the world in a better way as a best friend. By teachers, help man became a better person, and understood the discoveries.

The teachers are also special guides to show the correct path and to choose what is right or wrong. The man can leam how to be strong and lead the life. By teachers wisdom and grace one can leam to make our world better, and wiser place. So teachers are very important in every ones life. Teachers are boon to man.

God created teachers to show the way and they guide us to choose or decide the right path. The teachers are special guide to everyone.

We should learn how to make our world a better, wiser place with the help of our teachers.

Teachers help us to understand God’s world in easy way by becoming our special friends. And also they help us to become a better person.

We would decide how to live and how to do and what’s right instead of wrong after teacher’s guidance.

We become a better person after discovering the beauty and wonder

‘His’ refer to God. it is written with a capital letter since he created the whole world, he is the Lord.

“Awareness” is the poem written by Sylvia Stults. Here the poet warns us to be aware about the environment which we live in. We can see the broken bottles, half burnt glasses, papers and all kinds of waste here and there. The people throw unwanted solids carelessly and it causes the environment pollution. We live in this polluted environment. Our food is contaminated with poisonous insecticides and pesticides since it is sprayed on the crops.

Thick crude oil is mixed in the sea and oceans, cause great destruction to aquatic plants and animals. We consume (eat) this type of adulterated food. Industries throw out the poisonous gases and pollute the air which we breathe. All people should be aware of pollution and take necessary action. Otherwise the whole mankind may be destroyed in the future years.

Everyone should be aware of the problem Everyone should be aware of the condition in which we live. We should take the necessary measures to control air pollution. Planting of more trees, and refine the smoke from the industries, awareness to people are some of the measures to solve the problem.