Live Education Quiz

1

Efficiency of a machine is always:

A 100% B Less than 100% C Greater than 100% D Zero

2

A machine that works without energy loss is called:

A Simple machine B Ideal machine C Complex machine D Heat engine

3

Kinetic energy depends on:

A Mass only B Velocity only C Mass and velocity D Height only

4

Liquid pressure depends on:

A Shape of container B Depth of liquid C Color of liquid D Area of container

5

What is the spring constant?

A Force per unit mass B Extension per unit force C Force per unit extension D Area per unit force

6

Hooke’s Law is valid up to:

A Breaking point B Elastic limit C Melting point D Yield point

7

What is pressure?

A Force × area B Force / area C Area / force D Mass × force

8

Power is defined as:

A Work done per unit time B Energy stored C Force applied D Distance covered

9

Perpetual motion machines are impossible because they violate:

A Law of motion B Law of inertia C Law of conservation of energy D Law of gravitation

10

Which liquid produces more pressure at same depth?

A Water B Oil C Mercury D Alcohol

11

Which object has maximum kinetic energy?

A A stationary car B A slowly moving bicycle C A fast-moving truck D A parked bus

12

If more work is done in less time, power will be:

A Less B Zero C More D Negative

13

A manometer is used to measure:

A Atmospheric pressure only B Liquid pressure only C Gas pressure D Temperature

14

Which law states that energy cannot be created or destroyed?

A Newton’s first law B Law of inertia C Law of conservation of energy D Ohm’s law

15

Which is an application of Pascal’s Law?

A Barometer B Hydraulic lift C Thermometer D Speedometer

16

Liquid pressure increases with:

A Height B Density C Depth D All of these

17

Energy possessed by a moving object is called:

A Potential energy B Chemical energy C Kinetic energy D Heat energy

18

Beyond elastic limit, a material:

A Returns to original shape B Shows permanent deformation C Becomes rigid D Stops stretching

19

The limit of proportionality is the point where:

A Graph becomes horizontal B Extension stops C Force is zero D Graph stops being straight

20

Which material shows elasticity?

A Clay B Rubber band C Wet mud D Butter

21

If force is applied but no displacement occurs, the work done is:

A Maximum B Minimum C Zero D Negative

22

What happens to the shape of a body when a force is applied?

A It always breaks B It may change C It becomes heavier D It stops moving

23

Which energy source is non-renewable?

A Wind B Hydel C Coal D Solar

24

When a body falls freely, its potential energy is converted into:

A Chemical energy B Heat energy C Kinetic energy D Sound energy

25

What is deformation?

A Change in mass B Change in volume only C Change in shape or size D Change in temperature

26

Hydraulic machines work on:

A Hooke’s Law B Pascal’s Law C Archimedes’ Principle D Newton’s Law

27

What is meant by work done in physics?

A Force applied without movement B Movement without force C Force causing displacement D Energy stored in an object

28

Atmospheric pressure decreases with:

A Depth B Temperature C Height D Humidity

29

In a load-extension graph, the straight line shows:

A Breaking point B Elastic behavior C Plastic behavior D Failure point

30

The working liquid in a mercury barometer is: