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 space around the earth within it exerts a force of attraction on other bodies of known as:

Question # 2

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:

Question # 3

Area under the force displacement graph gives

Question # 4

The consumption of energy by a 60 W bulb in 2 minutes is:

Question # 5

In the force applied to parallel to the direction of motion, then the work done is:

Question # 6

Watt x second is unit of:

Question # 7

If force and displacement are in opposite direction, the work done is taken as:

Question # 8

If one newton force acts on a body and displaces the body through 1m work done on body is

Question # 9

Work done is lowering the bucket into the well is:

Question # 10

Work is a:

Question # 11

A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:

Question # 12

Teh consumption of energy by a 1000 watt heater in half an hour is:

Question # 13

The ultimate source of money sources of energy is:

Question # 14

Energy stored in the spring of a watch is called

Question # 15

SI Unit of work is

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The unit of work in CGS system is
A. Joule
B. Erg
C. Dyne
D. Watt
2 A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:
A. 0°
B. 30°
C. 60°
D. 90°
3 A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done in 25J. The angle which the force makes with the direction of motion will be
A. 60°
B. 90°
C. 30°
D. 0°
4 Work is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. None of these
5 A solar cell converts energy of the Sun into:
A. Heat energy
B. Magnetic energy
C. Light energy
D. Sound energy
6 The total work done in moving the body up and then down through the same height in a gravitational field is equal to:
A. mgh
B. Its wight
C. Weight X height
D. Zero
7 Work is always done on a body when:
A. A force acts on it
B. It moves through certain distance
C. None of A and B is correct
D. Both A and B is correct
8 Work done on a body by gravity in lifting it up to certain height is
A. Maximum
B. Minimum
C. Zero
D. Negative
9 The tidal energy is produced due to rotation of Earth relative to:
A. Moon
B. Sun
C. Oceans
D. Water
10 A solar cell is made from:
A. Iron
B. Silicon
C. Germanium
D. Copper

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