Question # 1

Which of the following types of force can do no work on the particle on which it acts

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Frictional force

Gravitational force

Electric force

Centripetal force

Tick the conservation force:

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Tension in a string

Air resistance force

Elastic spring

Frictional force

Area under the force displacement graph gives

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Power

Work

Heat

Energy

Work is a

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Scalar quantity

Vector quantity

Base quantity

None of these

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

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Maximum

Minimum

Zero

Negative

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

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Maximum

Minimum

Zero

Unity

1 J = ________?

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10⁷erges

10^-7erges

10⁵erges

10^-5erges

Power is a :

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Vector quantity

Base quantity

Scalar quantity

None of these

SI Unit of work is

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Nm^-1

Joule

Nms

Both a and b

The field in which work done in moving a body between two points depends upon the path followed is called:

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Conservative field

Non-conservative field

Electric field

None of these

Which force is not a conservative force:

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Frictional force

Gravitational force

Electric force

Elastic spring force

Which force is not a conservative force?

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Frictional force

Gravitational force

Electric force

Elastic spring force

The commercial unit of electrical energy is :

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K Watt

KWH

Horse power

Joule

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, which makes and angle of 60° with the horizontal. The work done by the boy is:

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1.25 J

12.5 J

125 J

None of these

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

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Positive

Negative

Zero

None of these

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Physics ECAT Pre Engineering Chapter 4 Work and Energy Online Test MCQs With Answers

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