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.

What type of energy is used to run submarine?(a) Wind energy(b) Ocean energy(c) Atomic energy(d) None of these

Answer»

(c) Atomic energy

2.

How fast should a man of 50 kg run so that his kinetic energy will be 625J?

Answer»

Mass = 50kg 

Kinetic energy = 625 J 

v = ? KE = ½ mv2 

v = 5 m/s

3.

Two circular coils A and B are placed closed to each other. If the current in the coil A is changed, will some current be induced in the coil B? Give reason.

Answer»

If the current in the coil A is changed there is change in its magnetic field. By this electricity is induced in B. This is called Electromagnetic induction.

4.

Define average power.

Answer»

We obtain average power by dividing the total energy consumed by the total time taken.

5.

Experiment to Verify Archimedes' Principle.

Answer»

Take a clean and dry beaker and find it's mass (m) using a physical balance. Now find the weight of a stone by suspending it from a spring balance. Fill an Eureka can (Eureka can is a beaker having a spout near the top) with water filled till the spout. Place the beaker of mass 'm' under the spout. Gently lower the solid, suspended from spring balance, into the Eureka can, till the stone is completely immersed in water. When the stone is immersed in water it displaces a certain amount of water. The spring balance records lesser value thereby showing that the solid experiences an upthrust. The displaced water is collected in the beaker. Using the physical balance the mass of the water and beaker is determined. Let it be m1.

∴ Amount of water displaced = m1 – m

If we compare the apparent loss of weight of the solid in water, with the amount of water displaced, it is found that they are equal. This experiment thus verifies Archimedes' Principle.

6.

Write Archimedes' Principle.

Answer»

Archimedes' studied the upthrust acting on a body, when it is partially or completely immersed in a fluid by performing several experiments and then stated the following principle known as the Archimedes' Principle.

According to this principle, when a body is partially or wholly immersed in a fluid, it experiences an upthrust (buoyant force) equal to the weight of the liquid displaced.

7.

How does the kinetic energy of a moving body depend on its a) speed b) mass

Answer»

a) Kinetic energy is directly proportional to the speed. 

b) Kinetic energy is directly proportional to the mass.

8.

Which would have a greater effect on the kinetic energy of an object: doubling the mass or doubling the velocity?

Answer»

Doubling the velocity would have a greater effect on the kinetic energy of an object.

9.

Two circular coils A and B are placed close to each other. If the current in coil A is changed, will some current be induced in the coil B ? Give reason for your answer.

Answer»

Yes, some current will be induced in the coil B because of change in magnetic field through the coil B due to change in current in coil A. This is called electromagnetic induction.

10.

Experimental Set up to Prove Archimedes' Principle

Answer»

Note the reading on the spring balance. Let it be W1. Now, slowly dip the stone in the water in a container and note the reading on the spring balance. The reading shown on the spring balance goes on decreasing until it is completely immersed in water. The reading on the spring balance gives us the weight of the stone. Since the reading goes on decreasing, we can infer that the weight of the object is decreasing when it is lowered in water. The apparent loss of weight shows that a type of force is acting on the object in the upward direction thereby decreasing the weight.

Thus the upward force acting on an object immersed in a liquid resulting in the apparent loss of weight of the object is called the buoyant force.

The tendency of a liquid to exert an upward force on an object placed in it thereby making it float or rise is called buoyancy.

11.

Factors Affecting the Buoyant Force

Answer»

We know that when an iron nail is placed on the surface of water it sinks whereas ship made up of iron floats. This is because size or volume of the ship is more.

Similarly when an iron nail and a cork of some mass is placed on water, the iron nail sinks because the density of iron nail is more than the density of water and whereas density of the cork is less than that of the water. Thus if the density of the liquid is more than the density of the material of the body then the body floats due to the buoyant force exerted by it and vice-versa.

From the above examples we can infer that the buoyant force experienced by a body when submerged in a liquid depends on the volume of the body and the density of the liquid.

12.

On what factors does the kinetic energy of a body depend?

Answer»

Following are the factors on which the kinetic energy of a body depends:

 a) mass of the body, m. 

b) square of velocity of the body, v2.

13.

A portable radio has a built-in transformer so that it can. work from the mains instead of batteries. Is this a step-up or step down transformer ?

Answer»

Step-down transformer (which reduces the voltage).

14.

If the speed of a body is halved, what will be the change in its kinetic energy?

Answer»

The kinetic energy will become one-fourth the actual value when the speed of the body is halved. 

15.

Along with live wire and neutral wire, a third wire is also used in domestic electric wiring. What name is given to this third wire

Answer»

Earth wire is third wire

16.

List the colours of the three wires in the cable connected to the plug of an electric iron.

Answer»

Red wire – Live wire.

Black wire – Neutral wire.

Green wire – Earth wire.

17.

How should the electric lamps in a building be connected so that the switching on or off in a room has no effect on other lamps in the same building ?

Answer»

(i) In case of parallel connection, if one of the appliances is switched off, other appliances keep on operating. 

(ii) In case of parallel connection, all the appliances are operated on same voltage i.e., the mains supply voltage.

Parallel connection.
18.

Expression for Kinetic Energy of a Moving Body

Answer»

Consider a body of mass 'm' which is initially at rest. When a force 'F' is applied on the body, let it start moving with a velocity 'v' and cover a distance 'S'. The force produces acceleration 'a' in the body.

The force 'F' does work when it moves the body through a distance 'S' and this work done is stored in the body as its kinetic energy.

By definition, W = F × S ...(1)

F = ma [Newton's second law of motion]

W = mas ...(2 )

Also, v2 - u2 = 2aS [Newton's third law of motion]

v2 - 0 = 2aS [Initial velocity u = 0 as the body is initially at rest]

v2 = 2aS

or a=v2/2s

Substituting the value of 'a' in equation (2) we get,

w=(mv2/2S) S

w=(mv2/2).....(3)

But since work done is stored in the body as its kinetic energy equation (3) can be written as

Kinetic energy(T) =1/2mv2

T=1/2mv2

From the above equation we can conclude that the kinetic energy of a body is directly proportional to (1) its mass and (2) the square of its velocity.

19.

What is the kinetic energy of an object?

Answer»

Kinetic energy is the energy possessed by a body by the virtue of its motion. Every moving object possesses kinetic energy. A body uses kinetic energy to do work. Kinetic energy of hammer is used in driving a nail into a log of wood, kinetic energy of air is used to run wind mills, etc.

20.

What is Potential energy? 

Answer»

The energy possessed by a body by virtue of its position or due to state of strain, is called potential energy. The work done to lift a body above the ground level gives the potential energy of the body. Eg. weight lifting.

Example: Water stored in reservoir has large amount of potential energy due to which it can drive a water turbine when allowed to fall down. This is the principle of production of hydroelectric energy.

21.

List the colours of the three wires in the cable connected to the plug of an electric iron.

Answer» Red wire – Live wire.

Black wire – Neutral wire.

Green wire – Earth wire.
22.

Write an expression for the kinetic energy of a body of mass m moving with a velocity v.

Answer»

Mass = m 

Velocity = v 

KE = ½ mv2

23.

Write an expression for the kinetic energy of an object.

Answer»

K.E = \(\frac{1}{2}\)mv2

24.

Write an expression for the kinetic energy of an object.

Answer»

If a body of mass m is moving with a velocity v, then its kinetic energy Ek is given by the expression, Ek = 1/2 mv2

Its SI unit is Joule(J).

25.

If v = \(\sqrt{s^2 + 1}\) prove that acceleration is ‘S’ (V = velocity, S = displacement).

Answer»

Given v = \(\sqrt{s^2 + 1}\)

Acceleration = \(\frac{ds}{dt}\) 

\(\frac{1}{2\sqrt{s^2 + 1}}.2s\frac{ds}{dt}\) = \(\frac{1}{2v}\).2.s.v.s units/sec2.

26.

……….. trees will only grow in very cold climates which also have snowfall. A) Devdar B) Brahmajemudu C) Nagajemudu D) Teak

Answer»

Devdar trees will only grow in very cold climates which also have snowfall. 

27.

From the above given figure, your observation is, if we pull one of the spring balances, the reading in other spring balance A) increases B) decreases C) no change D) we cannot say

Answer»

Correct option is A) increases

28.

The tree that grow in Evergreen forests. A) Kadambam B) Bamboo C) Neredu/Jamun D) All the above

Answer»

(D) All the above

29.

These forests grow in the regions where it rains only for some months and is warm and dry for most of the year. A) Evergreen B) Deciduous C) Thorny D) Coastal

Answer»

(B) Deciduous

30.

At present, which country is considered a laboratory of direct democracy?

Answer»

Switzerland is considered a laboratory of direct democracy.

31.

How is Yog a holistic work-out for physical health ?

Answer»

Yog is a holistic exercise that provides physical, mental as well as spiritual benefits. It provides work-out for muscles. It also benefits joints and the skeletal system by improving flexibility and balance. It is good for the heart and it stimulates the cardiovascular system.

It oxygenates the blood and helps strengthen the heart. It is good for the digestive system, the nervous system and supports respiratory system. It enables various endocrinal glands to function properly and reduces tension and anxiety.

32.

Surya Namaskar is an ancient form of Yog. This form of Yog is a complete meditative technique. It includes Asans and Pranayam. It is s a combination of 12 different postures, followed in a particular sequence with a specific breathing pattern. It helps an individual to vitalize and unblocks the whole system. It reduces fat from almost all parts of the body as it stretches and tones each and every muscle.(1) What is Surya Namaskar ? What does it include ?(2) How does Surya Namaskar help us ?

Answer»

(1) Surya Namaskar is an ancient pattern of Yog. It is a complete meditative technique. It includes Asans’ and Pranayam’. It is a combination of 12 different postures.

(2) Yog helps an individual to vitalize and unblocks the whole system. It reduces fat from almost all parts of our body as it stretches and 3 tones each and every muscle.

33.

What help does Yog provide to make us happier and comfortable?

Answer»

Yog is a holistic exercise that provides physical, mental as well as spiritual benefits. It helps improve almost all systems of our body, i. e., the skeletal system, the cardiovascular system, the digestive system, the nervous system and the respiratory system. It also helps cure many of our psychological problems. Thus, by helping us in many psychophysical elements, it leads us to happier and comfortable life.

34.

My responsibility as a Good Citizen (write any three points) 1. At Home 2. At School3. To myself 4. To the Environment

Answer»

At Home:

  • Being responsible
  • Using magic words and caring deeds
  • Being helpful

At School: 

  • Being respectful 
  • Follow rules 
  • Being patriotic 

To myself: 

  • Being honest 
  • Being self disciplined 
  • Displaying good character

To the Environment: 

  • Being compassionate 
  • Socially responsible
35.

“Curse of the Pharaoh”, joked a guard nervously. What is the curse and why did the guard say so ?

Answer»

The curse of the Pharaoh – death or misfortune falling upon those who disturbed him, is considered to be true. The fans of the CT scan machine got stuck with the sand dust and stopped working during scanning of the mummy. Then the guard jokingly said that it was the curse of the Pharaoh. Later another pair of white plastic fans were arranged which worked well enough.

36.

A director has to hold a minimum qualifying amount of shares of ` ___________ within ______ months after his appointment as director. (a) 5000, 2 (b) 50,000, 2 (c) 5000, 5 (d) 5000, 3.

Answer»

Correct option is (a) 5000, 2

37.

The Central Government may appoint some directors for a period of ___________ in case of mismanagement of company affairs (a) 3 and half yrs (b) Not more than 3 yrs (c) 5 yrs (d) Not more than 2 yrs.

Answer»

Correct option is (b) Not more than 3 yrs

38.

Disqualifications from becoming a Director of a company is(a) Insolvency (b) Fraudulent, declared by court (c) Unsound mind (d) All of the above.

Answer»

Correct option is (d) All of the above.

39.

The management process functions consist of(a) Planning, organising, staffing and directing (b) Planning, organising, leading and directing (c) Planning, organising, leading and staffing (d) Planning, organizing, leading and controlling.

Answer»

Correct option is (d) Planning, organizing, leading and controlling.

40.

Which of the following is not an organ of company management? (a) Officer (b) Board of Directors (c) Managing Director (d) Secretary.

Answer»

Correct option is (a) Officer

41.

Which of the following is not Kurt Lewin’s famous 3 stage perspective model of change?(a) Unfreezing current attitudes(b) Refreezing attitudes at new level(c) Moving to a new level(d) Melting resistance.

Answer»

Correct option is (d) Melting resistance.

42.

Mention the significance of the year 1911.

Answer»

The year 1911 is significant in the history of modern Telugu literature as the move¬ment for spoken dialect was started by Gidugu and Gurajada.

43.

Who appointed the members of the Commission?

Answer»

The elephant and the other ministers.

44.

Forcefield analysis suggests that before a manager embarks on a change strategy he should properly identify and evaluate ________ and ____________ .(a) Positive forces, negative changes (b) Driving forces, restraining forces (c) External forces, internal forces (d) Strong forces, weak forces.

Answer»

Correct option is (b) Driving forces, restraining forces

45.

At which position of the food chain would you place a human being A) Primary consumer B) Secondary consumer C) Tertiary consumer D) All the above

Answer»

The correct answer is C) Tertiary consumer.

46.

According to the man, his hut had room only for him.

Answer»

According to the man, his hut had room only for him: False.

47.

Why was no human being included in the Commission of Enquiry?

Answer»

They were not educated enough to understand the intricacies of jungle law.

48.

Write a paragraph in about 75 words on  Slow and steady wins the race.

Answer»

Success comes to only those who are slow and steady. Life is a race that takes lot of confidence and will power to succeed ahead of others.We should be very strong in performing our tasks with dedication and sincerty. One who is very careful in each and every movement towards the goal can only achieves success. So, rightly said is that slow and steady wins the race.

49.

Who commanded the ministers to appoint a Commission of Enquiry?

Answer»

The lion king.

50.

What did the lion wish to have in his kingdom?

Answer»

Peace and tranquillity.