Question # 1

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

None of these

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

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Nuclear field

Conservative field

Electric field

Gravitational field

A solar cell converts energy of the Sun into:

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Heat energy

Magnetic energy

Light energy

Sound energy

Work done by the force of friction is always

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Positive

Zero

Negative

Maximum

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

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Direction

Force applied

Path followed by the body `

Power

Work has a dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

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

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Maximum

Minimum

Zero

Negative

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

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Potential

Chemical

Mechanical

sound and heat

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:

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Power

Work

Pressure

None of these

The space around the earth within which it expects a force of attraction on other bodies is known as:

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Nuclear field

Conservative field

Electric field

Gravitational field

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

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0.5 J

2 J

0.25 J

1 J

The energy stored int he water of the dam is:

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Electric energy

Kinetic energy

Potential energy

None of these

The types of mechanical energy is/are:

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Kinetic energy

Potential energy

Both of these

None of these

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an 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

SI Unit of work is

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Nm^-1

Joule

Nms

Both a and b

Work is always done on a body when:

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A force acts on it

It moves through certain distance

None of A and B is correct

Both A and B is correct

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

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