Energy and Work: Interactive Learning Quizzes for Physics

Question 1

How can you make an energy transformation process more efficient?

Accepted Answer

Reduce energy loss during the transformation

Answer

Increase the energy input

Answer

Change the energy source

Answer

Raise the system's temperature

Question 2

How does the principle of conservation of energy apply to a rollercoaster ride?

Accepted Answer

The total energy of a rollercoaster remains constant at every point of the ride.

Answer

The kinetic energy of a rollercoaster is at its maximum at the top of the first hill and zero at the bottom.

Answer

The principle of conservation of energy does not apply to rollercoaster rides because there is friction.

Question 3

Which of the following is NOT a form of energy?

Accepted Answer

Mass

Answer

Kinetic Energy

Answer

Electrical Energy

Answer

Chemical Energy

Question 4

Which of the following is **not** a form of energy?

Accepted Answer

Speed

Answer

Kinetic energy

Answer

Heat energy

Answer

Gravitational potential energy

Question 5

When an object falls from a higher position to a lower position, which type of energy conversion takes place?

Accepted Answer

Potential energy to kinetic energy

Answer

Kinetic energy to potential energy

Answer

Heat energy to kinetic energy

Answer

Electrical energy to light energy

Question 6

Which of the following is the standard unit of energy?

Accepted Answer

Joule

Answer

Newton

Answer

Kilogram

Answer

Meter

Question 7

When a force is applied to an object and the object moves in the direction of the force, work is done.

Accepted Answer

True

Answer

False

Question 8

Which of the following factors **does not** affect the amount of work done?

Accepted Answer

Time taken to do the work

Answer

Magnitude of the force applied

Answer

Distance moved by the object

Answer

Direction of the force

Question 9

A ball is thrown upwards. As it rises, which form of energy is increasing?

Accepted Answer

Potential energy

Answer

Kinetic energy

Answer

Thermal energy

Answer

Electrical energy

Question 10

Which of the following devices converts mechanical energy to electrical energy?

Accepted Answer

Generator

Answer

Motor

Answer

Transformer

Answer

Battery

Question 11

Which of the following is a non-renewable source of energy?

Accepted Answer

Fossil fuels

Answer

Solar energy

Answer

Nuclear energy

Answer

Hydroelectricity

Question 12

Which of the following is **not considered** a form of energy?

Accepted Answer

Mass energy (energy equivalent of mass)

Answer

Kinetic energy (energy of motion)

Answer

Potential energy (stored energy)

Answer

Heat energy (energy of heat transfer)

Question 13

As a ball is thrown into the air, it gains:

Accepted Answer

Both kinetic and potential energy

Answer

Only kinetic energy

Answer

Only potential energy

Answer

Neither kinetic nor potential energy

Question 14

Which of the following is a unit of work?

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Answer

Kilogram

Question 15

The efficiency of a machine is defined as the ratio of:

Accepted Answer

Output work to input work

Answer

Input work to output work

Answer

Output energy to input energy

Answer

Input energy to output energy

Question 16

Which of the following is **not** an example of a simple machine?

Accepted Answer

Car engine

Answer

Lever

Answer

Electric motor

Answer

Hydraulic press

Question 17

The work done by a force is calculated as:

Accepted Answer

Force applied multiplied by distance moved

Answer

Force applied multiplied by time taken

Answer

Distance moved multiplied by time taken

Answer

Force applied multiplied by velocity

Question 18

When an object is lifted against gravity, its:

Accepted Answer

Potential energy increases

Answer

Kinetic energy increases

Answer

Heat energy increases

Answer

Chemical energy increases

Question 19

Which of the following is a renewable energy source?

Accepted Answer

Solar energy

Answer

Coal

Answer

Natural gas

Answer

Nuclear energy

Question 20

When a car brakes, what happens to its kinetic energy?

Accepted Answer

It is transformed into heat and sound.

Answer

It is completely lost.

Answer

It is entirely transferred to the brakes.

Answer

It remains constant.

Question 21

State the principle of conservation of energy.

Accepted Answer

Energy can neither be created nor destroyed, only transformed.

Answer

Energy can be created or destroyed.

Answer

Energy is always lost in any transformation.

Answer

Energy is always gained in any transformation.

Question 22

Which of the following energy sources is non-renewable?

Accepted Answer

Fossil fuels

Answer

Solar energy

Answer

Wind energy

Answer

Hydropower

Question 23

Define the relationship between power and work.

Accepted Answer

Power = Work / Time

Answer

Power = Work

Answer

Power = Time / Work

Answer

Power = Work * Time

Question 24

Which device converts electrical energy into mechanical energy?

Accepted Answer

Electric motor

Answer

Battery

Answer

Generator

Answer

Transformer

Question 25

A machine performs 500 J of useful work while consuming 800 J of input energy. Calculate its efficiency.

Accepted Answer

62.5%

Answer

50%

Answer

75%

Answer

87.5%

Question 26

Which of the following is NOT a form of usable energy?

Accepted Answer

Mass

Answer

Kinetic energy

Answer

Potential energy

Answer

Chemical energy

Question 27

When a ball is thrown upwards, which form of energy does it possess at the highest point of its trajectory?

Accepted Answer

Potential energy only

Answer

Kinetic energy only

Answer

Both kinetic and potential energy

Answer

Neither kinetic nor potential energy

Question 28

Which of the following describes the principle of conservation of energy?

Accepted Answer

Energy can be transferred or transformed but not created or destroyed.

Answer

Energy can be created or destroyed.

Answer

Energy is always lost in any process.

Answer

Energy is always gained in any process.

Question 29

A force of 10 N is applied to move an object through a distance of 5 m. How much work is done?

Accepted Answer

50 J

Answer

5 J

Answer

10 J

Answer

100 J

Question 30

Which of the following is a unit of power?

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Kilogram

Question 31

A car travels at a constant speed on a level road. Which of the following forces is doing work on the car?

Accepted Answer

Propulsion force

Answer

Gravitational force

Answer

Normal force

Answer

Friction

Question 32

Which of the following is an example of energy dissipation?

Accepted Answer

A ball rolling to a stop

Answer

A light bulb emitting light

Answer

A battery providing current

Answer

A generator converting mechanical energy to electrical energy

Question 33

Which of the following processes involves the conversion of chemical energy to electrical energy?

Accepted Answer

Combustion

Answer

Photosynthesis

Answer

Respiration

Answer

Evaporation

Question 34

A wind turbine converts the kinetic energy of wind into electrical energy. What is the efficiency of a wind turbine that produces 100 kW of electrical power from a wind with a power of 150 kW?

Accepted Answer

66.67%

Answer

50%

Answer

75%

Answer

100%

Question 35

The process by which thermal energy is transferred from one object to another through contact is called:

Accepted Answer

Conduction

Answer

Convection

Answer

Radiation

Answer

Induction

Question 36

Which of the following is a renewable energy source?

Accepted Answer

Hydropower

Answer

Coal

Answer

Natural gas

Answer

Nuclear energy

Question 37

The principle of conservation of energy states that:

Accepted Answer

The total amount of energy in an isolated system remains constant.

Answer

Energy is lost in all transformations.

Answer

Energy can be created or destroyed.

Answer

Energy is always converted from higher to lower quality.

Question 38

Which of the following is the SI unit of power?

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Calorie per second

Question 39

An object with a mass of 2 kg is lifted vertically through a height of 5 meters. How much gravitational potential energy does the object gain?

Accepted Answer

20 J

Answer

10 J

Answer

50 J

Answer

100 J

Question 40

Which of the following is a vector quantity?

Accepted Answer

Force

Answer

Temperature

Answer

Mass

Answer

Energy

Question 41

The efficiency of a machine is defined as the:

Accepted Answer

Ratio of useful output energy to total input energy

Answer

Ratio of total input energy to useful output energy

Answer

Difference between input and output energy

Answer

Product of input and output energy

Question 42

Which of the following energy transformations occurs in a solar power plant?

Accepted Answer

Solar energy to electrical energy

Answer

Chemical energy to electrical energy

Answer

Kinetic energy to electrical energy

Answer

Nuclear energy to electrical energy

Question 43

The law of conservation of momentum states that in an isolated system, the total momentum of all objects:

Accepted Answer

Is constant

Answer

Is always zero

Answer

Increases over time

Answer

Decreases over time

Question 44

How can energy efficiency be improved in a household?

Accepted Answer

Switch to LED light bulbs

Accepted Answer

Use a clothesline to dry clothes instead of a tumble dryer

Answer

Increase the use of air conditioning

Answer

Leave electronic devices on standby

Question 45

Which of the following is **not** a recognized form of energy?

Accepted Answer

Weight

Answer

Heat

Answer

Kinetic

Question 46

The standard unit of energy in the International System of Units (SI) is the:

Accepted Answer

Joule (J)

Answer

Newton (N)

Answer

Watt (W)

Question 47

Which of the following is considered a non-conservative force?

Accepted Answer

Friction

Answer

Elasticity

Answer

Tension

Answer

Gravity

Question 48

The principle of conservation of energy states that:

Accepted Answer

Energy cannot be created or destroyed but can be transferred from one form to another.

Answer

Energy is always lost when transferred from one form to another.

Answer

Energy can be created or destroyed at will.

Question 49

Which among the following describes potential energy?

Accepted Answer

Gravitational potential energy

Answer

Kinetic energy

Answer

Thermal energy

Answer

Electrical energy

Question 50

Which device on the list is an example of a simple machine?

Accepted Answer

Lever

Answer

Car engine

Answer

Electric motor

Answer

Computer

Question 51

Which of the following energy sources is considered renewable?

Accepted Answer

Solar energy

Answer

Coal

Answer

Natural gas