Question # 1

Work is a

Choose an answer

Scalar quantity

Vector quantity

Base quantity

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 and angle of 60° with the horizontal. The work done by the boy is:

Choose an answer

1.25 J

12.5 J

125 J

None of these

Which of the following is not a unit of power:

Choose an answer

J-sec

Watt

N m/sec

Horsepower

A solar cell is made from:

Choose an answer

Iron

Silicon

Germanium

Copper

A field in which the work done is moving a body along closed path is zero is called:

Choose an answer

Nuclear filed

Conservative field

Gravitational field

Non-conservative field

Work done is maximum when angle between force and displacement is:

Choose an answer

0°

90°

180°

None of these

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

Choose an answer

Nuclear field

Conservative field

Electric field

Gravitational field

The energy stored int he water of the dam is:

Choose an answer

Electric energy

Kinetic energy

Potential energy

None of these

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

Choose an answer

Positive

Negative

Zero

None of these

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

Choose an answer

Frictional force

Gravitational force

Electric force

Centripetal force

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

Choose an answer

Much more

Very small

No amount at all

None of these

A 100 Kg car is moving at the speed of 10 m/sec and comes to rest after covering a distance of 50 m. The amount of work done against the friction is:

Choose an answer

+5 X 10¹J

+5 X 10²J

+5 X 10³J

+5 X 10⁴J

1 J = ________?

Choose an answer

10⁷erges

10^-7erges

10⁵erges

10^-5erges

Maximum work is done when force and displacement are

Choose an answer

Parallel

Antiparallel

Perpendicular

Both a and b

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

Choose an answer

0.5 J

2 J

0.25 J

1 J

More Classes

Other Links

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

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer