ECAT Pre Computer Science Chapter 4 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 4 Work and Energy

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ECAT Physics Chapter 4 Work and Energy

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Question # 1

The value of escape velocity of Earth planet comes out to be:

Question # 2

Power is a :

Question # 3

The commercial unit of electrical energy is :

Question # 4

Work done is maximum when angle between force and displacement is

Question # 5

Work done on a body by gravity in lifting it up to certain height is

Question # 6

Watt x second is unit of:

Question # 7

The work done by a force, keeping an object in circular motion with constant speed is:

Question # 8

Work is product of:

Question # 9

When a falling body hits ground, its KE changes to _____ energy.

Question # 10

Area under the force displacement graph gives

Question # 11

Energy stored in the spring of a watch is called

Question # 12

A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

Question # 13

The dimensions of work

Question # 14

Escape velocity from surface of Moon as compared to that from Earth surface is:

Question # 15

Work has the dimension as that of:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The power of an electric generating station is expressed in:
A. Kilo Jule
B. Kilowatt-hour
C. Kilo watt
D. Watt
2 The consumption of energy by a 60 W bulb in 2 minutes is:
A. 2 watt-hour
B. 120 watt-hour
C. 30 watt-hour
D. None of these
3 When force and displacement are perpendicular to each other than work is equal to
A. Unity
B. Infinity
C. Zero
D. -Fd
4 Work done is maximum when angle between force and displacement is
A. 0°
B. 90°
C. 180°
D. None of these
5 Work done in lower and bucket into the well is:
A. Zero
B. Positive
C. Negative
D. None of these
6 If we draw a graph between d (along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis, then area under this straight line represents:
A. Power
B. Work
C. Pressure
D. None of these
7 Escape velocity from surface of Moon as compared to that from Earth surface is:
A. Greater
B. Smaller
C. Equal
D. None of thes
8 When a wall is pushed by a person very strongly, he has done:
A. Maximum work
B. Zero work
C. Positive work
D. Negative work
9 Work has the dimensions as that of
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
10 Power is a :
A. Vector quantity
B. Base quantity
C. Scalar quantity
D. None of these

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