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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. |
Which would have a greater effect on the kinetic energy of an object : doubling the mass or doubling velocity ? |
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Answer» Which would have a greater effect on the kinetic energy of an object : doubling the mass or doubling velocity ? |
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| 2. |
Show that the sum of kinetic energy and potential energy(i.e., total mechanical energy) is always conserved in the case of freely falling body under gravity (with air resistance neglected) from a height h by finding it when (i) the body is at the top, (ii) the body has fallen a distance x, (iii) the body has reached the ground. |
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Answer» Show that the sum of kinetic energy and potential energy(i.e., total mechanical energy) is always conserved in the case of freely falling body under gravity (with air resistance neglected) from a height h by finding it when (i) the body is at the top, (ii) the body has fallen a distance x, (iii) the body has reached the ground. |
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| 3. |
State Newton's third law. |
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Answer» State Newton's third law. |
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| 4. |
Which kind of sound is produced in an earthquake before the main shock wave begins ? (a) ultrasound (b) infrasound (c) audible sound (d) none of the above |
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Answer» Which kind of sound is produced in an earthquake before the main shock wave begins ? (a) ultrasound (b) infrasound (c) audible sound (d) none of the above |
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| 5. |
Give reason that The force of gravitational between two cricket balls is extreamly small but that between a cricket ball and the earth is extreamly large |
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Answer» Give reason that The force of gravitational between two cricket balls is extreamly small but that between a cricket ball and the earth is extreamly large |
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| 6. |
Why does the weight of an object differs on poles and equator? |
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Answer» Why does the weight of an object differs on poles and equator? |
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| 7. |
Given a particle's velocity- time graph which is in motion along a line. What is the total distance travelled by the particle till t = 20 sec? |
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Answer»
Given a particle's velocity- time graph which is in motion along a line. What is the total distance travelled by the particle till t = 20 sec? |
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| 8. |
A car moving on a straight path covers a distance of 1 km due east in 100 s. What is the velocity of car |
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Answer» A car moving on a straight path covers a distance of 1 km due east in 100 s. What is the velocity of car |
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| 9. |
A girl weighing 400 N climbs a vertical ladder. If the value of g be 10 m s−2, the work done by her after climbing 2 m will be: (a) 200 J (b) 800 J (c) 8000 J (d) 2000 J |
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Answer» A girl weighing 400 N climbs a vertical ladder. If the value of g be 10 m s−2, the work done by her after climbing 2 m will be: (a) 200 J (b) 800 J (c) 8000 J (d) 2000 J |
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| 10. |
Which of the following magnetic ore was once used as a primitive compass? |
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Answer» Which of the following magnetic ore was once used as a primitive compass? |
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| 11. |
Calculate the work done in raising a stone of mass 4 kg and specific gravity 2 immersed in water from a depth of 3 m to 1 m below the surface. |
| Answer» Calculate the work done in raising a stone of mass 4 kg and specific gravity 2 immersed in water from a depth of 3 m to 1 m below the surface. | |
| 12. |
Name two substances which contract on heating. |
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Answer» Name two substances which contract on heating. |
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| 13. |
Why is mercury used in a barometer? |
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Answer» Why is mercury used in a barometer? |
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| 14. |
What does it mean by "some of the positively charged particles carry a multiple of the fundamental unit of electrical charge" ? |
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Answer» What does it mean by "some of the positively charged particles carry a multiple of the fundamental unit of electrical charge" ? |
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| 15. |
For the circuit shown in the following diagram what is the value of [3 MARKS] (i) current through 6 ohm resistor (ii) potential difference across 12 ohm |
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Answer» For the circuit shown in the following diagram what is the value of [3 MARKS] (i) current through 6 ohm resistor (ii) potential difference across 12 ohm
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| 16. |
Which uses more energy, a 250 W TV set in 1 h, or a 1200 W toaster in 10 minutes? [2 MARKS] |
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Answer» Which uses more energy, a 250 W TV set in 1 h, or a 1200 W toaster in 10 minutes? [2 MARKS] |
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| 17. |
X and Y are two iron ball with different masses. Which of the following statement is correct? |
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Answer» X and Y are two iron ball with different masses.
Which of the following statement is correct? |
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| 18. |
The brake applied to a car produce an acceleration of 6m/s^2 in opposite direction. If the car stops in 2 seconds calculate the distance travelled |
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Answer» The brake applied to a car produce an acceleration of 6m/s^2 in opposite direction. If the car stops in 2 seconds calculate the distance travelled |
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| 19. |
Suppose that it takes a simple pendulum 1.2 seconds to swing from its leftmost point to its rightmost point. What is the period of the pendulum? |
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Answer» Suppose that it takes a simple pendulum 1.2 seconds to swing from its leftmost point to its rightmost point. What is the period of the pendulum?
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| 20. |
how gravity in the moonand what is gravitation |
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Answer» how gravity in the moonand what is gravitation |
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| 21. |
Explain giving an example that an object can be in motion as well as at rest at the same time. |
| Answer» Explain giving an example that an object can be in motion as well as at rest at the same time. | |
| 22. |
The average weight of 10 oarsmen in a boat is increased by 1.5 kg when one of the crew who weighs 58 kg is replaced by a new man. Find the weight of their new man. |
| Answer» The average weight of 10 oarsmen in a boat is increased by 1.5 kg when one of the crew who weighs 58 kg is replaced by a new man. Find the weight of their new man. | |
| 23. |
How much water per minute will a pump of power 2kW can raise to a height of 10m.(g=10m/s) |
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Answer» How much water per minute will a pump of power 2kW can raise to a height of 10m.(g=10m/s) |
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| 24. |
Why do sound travel faster in solids compared to liquids and gases |
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Answer» Why do sound travel faster in solids compared to liquids and gases |
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| 25. |
how does current flows in an electrolyte |
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Answer» how does current flows in an electrolyte |
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| 26. |
A barometer kept in an elevator reads 76 cm when it is at rest. If the elevator goes up with increasing speed, the reading will be |
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Answer» A barometer kept in an elevator reads 76 cm when it is at rest. If the elevator goes up with increasing speed, the reading will be |
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| 27. |
The SI unit of current is_______. |
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Answer» The SI unit of current is_______. |
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| 28. |
A moon is revolving around the earth in a circular path. How much work is done by moon |
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Answer» A moon is revolving around the earth in a circular path. How much work is done by moon |
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| 29. |
On a 120 m track, a train travels the first 30 km at a uniform speed of 30 km/hr.calculate speed with which the train should rest of the track so as to get the average speed of 60 km/hr for the entire trip? |
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Answer» On a 120 m track, a train travels the first 30 km at a uniform speed of 30 km/hr.calculate speed with which the train should rest of the track so as to get the average speed of 60 km/hr for the entire trip? |
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| 30. |
Why sound requires a much larger area for reflection? |
| Answer» Why sound requires a much larger area for reflection? | |
| 31. |
___force is a short range force. |
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Answer» |
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| 32. |
In a telescopic image of night sky, some stars are blue in colour while others appear to be red in colour. What determines the colour of the star? |
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Answer» In a telescopic image of night sky, some stars are blue in colour while others appear to be red in colour. What determines the colour of the star? |
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| 33. |
The gravitational force between the earth and an object is called |
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Answer» The gravitational force between the earth and an object is called |
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| 34. |
A body of mass 5 kg falls from a height of 10 m to 4m. Calculate: (i) the loss in potential energy of the body, and (ii) the total energy possessed by the body at any instant? (Take g=10 m s−2). |
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Answer» A body of mass 5 kg falls from a height of 10 m to 4m. Calculate: (i) the loss in potential energy of the body, and (ii) the total energy possessed by the body at any instant? (Take g=10 m s−2). |
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| 35. |
The pulleys in figure (10 - E6) are identical, each having a radius R and moment of inertia I. Find the acceleration of the block M. |
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Answer» The pulleys in figure (10 - E6) are identical, each having a radius R and moment of inertia I. Find the acceleration of the block M.
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| 36. |
Which one of the following words best describes the emotion evoked by the footprint in the author? |
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Answer» Which one of the following words best describes the emotion evoked by the footprint in the author? |
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| 37. |
Which of the following vibrates when a musical note is produced by the cymbals in an orchestra ? (a) stretched strings (b) stretched membranes (c) metal plates (d) air columns |
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Answer» Which of the following vibrates when a musical note is produced by the cymbals in an orchestra ? (a) stretched strings (b) stretched membranes (c) metal plates (d) air columns |
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| 38. |
Two bodies of different masses ma and mb are dropped from two different heights a and b. The ratio of the time taken by the two to cover these distances are |
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Answer» Two bodies of different masses ma and mb are dropped from two different heights a and b. The ratio of the time taken by the two to cover these distances are |
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| 39. |
Name the principle which gives the magnitude of buoyant force acting on an object immersed in a liquid. |
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Answer» Name the principle which gives the magnitude of buoyant force acting on an object immersed in a liquid. |
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| 40. |
If the length of a simple pendulum at a given place is increased by 6 times, the ratio of the final to the initial time periods of the pendulum is: |
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Answer» If the length of a simple pendulum at a given place is increased by 6 times, the ratio of the final to the initial time periods of the pendulum is: |
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| 41. |
Why is the center of mass of a body often called its center of gravity? |
| Answer» Why is the center of mass of a body often called its center of gravity? | |
| 42. |
A Vernier caliper has 1 mm marks on the main scale. It has 20 equal divisions on the Vernier scale which matches with 16 main scale divisions. For this Vernier caliper, the least count is: |
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Answer» A Vernier caliper has 1 mm marks on the main scale. It has 20 equal divisions on the Vernier scale which matches with 16 main scale divisions. For this Vernier caliper, the least count is: |
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| 43. |
In a satellite if the time of revolution is T, then its kinetic energy is proportional to |
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Answer» In a satellite if the time of revolution is T, then its kinetic energy is proportional to |
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| 44. |
If the temperature increases, the surface tension of a liquid_______. |
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Answer» If the temperature increases, the surface tension of a liquid_______. |
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| 45. |
A car starting from rest accelerates uniformly to acquire a speed 20 km h−1 in 30 min.The distance travelled by car is this time interval will be: (a) 600 km (b) 5 km (c) 6 km (d) 10 km |
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Answer» A car starting from rest accelerates uniformly to acquire a speed 20 km h−1 in 30 min.The distance travelled by car is this time interval will be: (a) 600 km (b) 5 km (c) 6 km (d) 10 km |
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| 46. |
In which medium sound travels faster: air or iron? |
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Answer» In which medium sound travels faster: air or iron? |
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| 47. |
A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then : |
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Answer» A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then : |
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| 48. |
Which of the following forces is associated with the weight of physical objects? |
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Answer» Which of the following forces is associated with the weight of physical objects? |
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| 49. |
A machine does 1920 joule of work in 240 seconds. What is the power of the machine? |
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Answer» A machine does 1920 joule of work in 240 seconds. What is the power of the machine? |
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| 50. |
Karate player break the brick in a single blow . Why? |
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Answer» Karate player break the brick in a single blow . Why? |
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