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 power of an electric generating station is expressed in:

Question # 2

Work is a:

Question # 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

Question # 4

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

Question # 5

A solar cell converts energy of the Sun into:

Question # 6

The work done in moving a body between two points in a conservation field is independent of the:

Question # 7

Work done along a closed path in a gravitational field is:

Question # 8

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

Question # 9

Work done is lowering the bucket into the well is:

Question # 10

The commercial unit of electrical energy is :

Question # 11

1 J = ________?

Question # 12

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

Question # 13

When the body is moves against the force of friction on a horizontal plane, the work done by the body is:

Question # 14

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is

Question # 15

The angle between centripetal force and displacement of the body moving in a circle is:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 In the force applied is parallel to the direction of motion, then work done is:
A. Maximum
B. Minimum
C. Zero
D. None of these
2 Teh consumption of energy by a 1000 watt heater in half an hour is:
A. 5 Kwh
B. 0.5 Kwh
C. 2.5 Kwh
D. 3.2 Kwh
3 If work is done at the rate of 2 k j per second, then total work done is half an hour will be:
A. 0.5 Kwn
B. 2 Kwh
C. 1 Kwh
D. None of these
4 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:
A. Minimum Work
B. Maximum Work
C. Zero Work
D. Negative Work
5 The commercial unit of electrical energy is :
A. K Watt
B. KWH
C. Horse power
D. Joule
6 A solar cell is made from:
A. Iron
B. Silicon
C. Germanium
D. Copper
7 Most of the geysers occur in:
A. Volcanic regions
B. Magnetic regions
C. Northern region
D. None of these
8 Area under the force displacement graph gives
A. Power
B. Work
C. Heat
D. Energy
9 Work done is maximum when angle between force and displacement is
A. 0°
B. 90°
C. 180°
D. None of these
10 Which of the following types of force can do no work on the particle on which it acts
A. Frictional force
B. Gravitational force
C. Electric force
D. Centripetal force

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