ECAT Physics Work and Energy Test Online

Let’s start the thrilling journey to ECAT Physics Work and Energy Test Online by taking our in-depth online practice exam. You can practice and improve your comprehension of these key ideas with the aid of this test. We have compiled a set of well crafted questions for this MCQ-based test that will put your knowledge and problem-solving abilities in the area of work and energy to the test. This example paper will be a valuable tool whether you are studying for the ECAT test or just trying to get better at physics. You can fully understand the topics because each question comes with a thorough explanation of the correct response.

Physics Work and Energy MCQS Online Test

ECAT Physics Work and Energy Chapter Online Test

ECAT Physics Work and Energy Test Online 

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Physics

1. The escape velocity of moon in Kms¯¹ is

2.59

1.23

2.40

2.43

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2. The value of the escape velocity on the surface of the earth is:

1100 m sec¯¹

1100 m sec¯¹

11 x 10⁸ m sec¯¹

11 m sec¯¹

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3. When a force is parallel to the direction of motion of the body. Then work done on the body is

Infinity

Zero

Minimum

Maximum

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4. The original source of biomass energy is

Moon

Geothermal

None of these

Sun

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5. The P.E. of a body at a certain height is 200 J. The kinetic energy possessed by it when it just touches the surface of the earth is:

< P.E.

Cannot be known

> P.E.

= P.E.

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6. If it is assumed that a frictional force f is present, during the downward motion of an object of mass, which of the following relation is true.

None of these

mgh – f = ½ mV²

mgh – f = ½ mV²

2mg – f = ½ mV²

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7. The field, in which is the work done is independent of the path followed, is called

Varying intensity field

Non-conservative field

None of these

Conservative fields

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8. A body of mass 2 kg is dropped from a height of 1m. Its kinetic energy as it touches the ground is

19.6 N

19.6 kg

19.6 m

19.6 J

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9. Two objects of masses 1 x 10¯³ kg and 4 x 10¯³ kg have equal momentum. What is the ratio of their kinetic energies?

4:1

2:1

16:1

19:1

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10. All the food you eat in one day has the energy equivalent to petrol of

1/5 liter

1/8 liter

1/6 liter

¼ liter

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11. Approximate power of flash light in watts (2 cells)

1.56

1.55

1.5

1.2 moon m

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12. A boat moving at constant speed v through still water experiences a total frictional drag F. What is the power developed by the boat?

0.5Fv²

Fv

Fv²

0.5Fv

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13. A bullet is shot from a rifle. As a result the rifle recoils. The kinetic energy of rifle as compared to that of bullet is

Greater

Cannot be concluded

Equal

Less

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14. A man pushes a wall but fails to displace it. He does:

Negative work

No work

Maximum positive work

Positive work but

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15. A solar cell converts sun’s energy into:

Sound

Heat energy

Light

Electric energy

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16. A machine does 2500 J of work in 1 min. What is the power developed by the machine?

42 W

150 W

2500 W

21 W

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17. A container with a mass of 5 kg is lifted to a height of 8 m. How much work is done by the external force?

50 J

Zero

400 J

-400 J

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18. A container with a mass of 5 kg is lifted to a height of 8 m. How much work is done by the gravitational force?

400 J

Zero

-400 J

50 J

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19. The dimension of power is

[M²LT¯³]

[ML²T¯²]

[ML²T³]

[MLT]

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20. A truck driver is typing to push a loaded truck with an applied force. Unfortunately, his attempt was unsuccessful the truck stays stationary no matter how hard the driver pushes. How much work is done by the driver?

Fd

F/d

-Fd

Zero

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21. Geothermal energy with in the earth is generated by

All

Compression of material

Residual heat of the earth

Radio active decay

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22. The original source of geothermal energy is

Fossil fuels

Moon

Earth

Biomass

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23. A man of mass 50 kg jumps to a height of 1 m. His potential energy at the highest point is (g = 10 m/s²)

60 J

600 J

500 J

50 J

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24. Approximate power of a car moving at a speed of 90 kmh¯¹ in watts

1.3 x 10⁷

1 x 10⁵

1.2 x 10⁶

1.4 x 10⁸

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25. Reason of weightlessness in a satellite is

None of these

Zero reaction force by satellite surface

Zero gravity

Center of mass

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26. A 1 kg mass has a kinetic energy of 1 joule when its speed is

1.4 m/s

4.4 m/s

1 m/s

0.45 m/s

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27. Approximate power of colour T.V in watt is

90

100

120

130

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28. SI unit of work is

N – ms¯¹

N – m

N – m²

N – MS¯²

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29. A coolie carries a load of 500 N to a distance of 100 m. The work done by him is

0

1/5 N

5 N

50,000 Nm

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30. Which of the following is not a perfectly inelastic collision?

A bullet striking a bag of sand

An electron captured by a proton

Striking of two glass balls

A man jumping onto a moving cart

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31. The average power and instantaneous power become equal if work is done at:

At variable rate

Any rate

At uniform rate

At high rate

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32. The original source of tidal energy is

Waves

Sun

Tides

Moon

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33. Power is a measure of the

Force which produces motion

Change of energy

Rate of change of energy

Rate of change of momentum

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34. Work done is a gravitational field along a closed loop is

1

Zero

Maximum

Minimum

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35. Which form of energy does the flowing water possess?

Gravitational energy

Potential energy

Electrical energy

Kinetic energy

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36. The relation between horse power and watt is

1 hp = 1000 watts

1 hp = 546 watts

1 hp = 946 watts

1 hp = 746 watts

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37. For the same velocity, the momentum is maximum for:

An electron

A deuteron

An a particle

A proton

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38. The original source of hydroelectric is

Moon

Wind

Water

Sun

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39. The Escape velocity of Earth in Kms¯¹

9.75

11.2

12.3

15.6

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40. The initial velocity with which a body projected upward and never comes back is called

Terminal velocity

Kinetic energy

None of these

Escape velocity

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41. Which of the following is conservative field?

Frictional field

Electrostatic field

Viscous field

All of these

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42. A meteor of mass m enters the Earth’s atmosphere at an angle θ to the horizontal with an initial velocity v. Which of the following is true about vertical component of its velocity?

None

It decreases throughout the motion.

It increases throughout the motion

It remains constant throughout the motion.

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43. A spacecraft moves around Earth in a circular orbit with a constant radius. How much work is done by the gravitational force on the spacecraft during one revolution?

mgh

FGd

-FGd

Zero

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44. Which of the following is true?

Neither momentum nor kinetic energy is conserved in inelastic collisions

Both momentum and kinetic energy are conserved in all collisions

Momentum is conserved in all collisions but not kinetic energy

Momentum is conserved in all collisions but kinetic energy is conserved only in inelastic collisions

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45. The atmosphere is held to the earth by

Clouds

Winds

The rotation of earth

Gravity

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46. If the force applied is F and the velocity gained is v, then the power developed is

F/v

v/F

Fv²

Fv

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47. The work done by the body is maximum when it has angle

30°

60°

0°

90°

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48. If a body a mass of 2 kg is raised vertically through 2m, then the work done will be

3.92 J

39.2 J

392.1 J

38.2 J

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49. Work is defined as the dot product of force and displacement but it is a

None of these

Constant quantity

Vector quantity

Scalar quantity

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50. The moon produce the tides raise the water in the se roughly

Once a day

None of these

Twice a day

Several a day

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51. The work done is a gravitational field is independent of:

Its potential energy

Its mass

Its distance

Its path

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52. The K.E of a light and a heavy object is same. Which object has maximum momentum?

Data is not sufficient

Heavy object

Light object

Both have the same momentum

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53. The unit of power is

Joule per second

Watt per second

Joule

Kilojoule

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54. An average energy used by the car from petrol in its life time

1 x 10¹¹ J

1 x 10¹² J

1 x 10⁹ J

1 x 10¹⁰ J

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55. The work done in taking a particle from the floor to a table depends on

The actual path taken

The height of the table

The speed of the particle

The tie taken in this work

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56. The type of energy possessed by a simple pendulum, when it is at the mean position is

Kinetic energy

Sound energy

Potential energy

Potential energy + kinetic energy

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57. The Escape velocity of Mars in Kms¯¹

5.23

3.99

5.00

2.89

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58. An elevator weighing 3.5 x 10–6 N is raised to a height of 1000 m in the absence of friction, the work done is

3.5 x 10⁴ J

3.5 x 10⁹ J

3.5 x 10³ J

3.5 x 10⁶ J

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59. The Escape velocity of Saturn in Kms¯¹

37.4

30.0

37.0

35.04

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60. Name the physical quantity which is equal to the product of force and velocity.

Energy

Acceleration

Power

Work

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61. If a body falls from a height, the relation between its kinetic and potential energies is:

Gain in K.E = Loss in P.E. – Work done against friction

Loss in P.E = Gain in K.E. – Work done against friction

Gain in P.E = Loss in K.E. + Work done against friction

Loss in K.E = Gain in P.E. + Work done against friction

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62. One Kilowatt hour is equal

3.6 x 10⁶ J

3.5 x 10⁵ J

3.5 x 10⁶ J

306 x 10⁵ J

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63. If air resistance is negligible, the sum total of potential and kinetic energies of a freely falling body ___________.

Becomes zero

Decreases

Increases

Remains the same

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64. A body of mass 10 kg is dropped to the ground from a height of 10 meters. The work done by from a height of 10 meters. The done by the gravitational force is (g = 9.8m/s²)

+ 980 Joules

+ 490 Joules

- 980 Joules

- 490 Joules

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65. Kilowatt-hour commercially used to measure the consumption of

Energy produced in nuclear plants

Power of petrol engine

Electrical Energy

None of these

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