Energy: Learn and Master the Fundamentals with Interactive Quizzes

Question 1

Which of the following is NOT a form of energy?

Accepted Answer

Gravity

Answer

Electrical energy

Answer

Motion

Answer

Light

Question 2

A pendulum swings back and forth. At the highest point of its swing, which type of energy does it have the most of?

Accepted Answer

Potential energy

Answer

Kinetic energy

Answer

Both kinetic and potential energy

Answer

Neither kinetic nor potential energy

Question 3

A light bulb converts electrical energy into what type of energy?

Accepted Answer

Light energy

Answer

Heat energy

Answer

Sound energy

Answer

Mechanical energy

Question 4

Which of the following is a unit of power?

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Kilogram

Question 5

Which of the following is NOT a type of energy transformation?

Accepted Answer

Potential to gravitational

Answer

Electrical to mechanical

Answer

Chemical to thermal

Answer

Thermal to kinetic

Question 6

The law of conservation of energy states that energy cannot be:

Accepted Answer

Created or destroyed

Answer

Converted from one form to another

Answer

Transferred from one object to another

Answer

Stored in different forms

Question 7

Regarding a car moving at a constant speed on a flat surface, which statement accurately describes its energy?

Accepted Answer

Total energy remains constant

Answer

Kinetic energy is diminishing

Answer

Potential energy is increasing

Answer

Thermal energy is decreasing

Question 8

What form of energy does a wind turbine generate from the wind's kinetic energy?

Accepted Answer

Electrical energy

Answer

Potential energy

Answer

Thermal energy

Answer

Chemical energy

Question 9

In a hydroelectric power station, the potential energy of water is transformed into which type of energy?

Accepted Answer

Electrical energy

Answer

Chemical energy

Answer

Thermal energy

Answer

Nuclear energy

Question 10

Power is defined as:

Accepted Answer

Work done per unit of time

Answer

Energy stored per unit of time

Answer

Force exerted per unit of time

Answer

Distance travelled per unit of time

Question 11

The law of conservation of energy states that:

Accepted Answer

The total amount of energy in the universe is constant

Answer

Energy can be created or destroyed

Answer

Energy can only exist in one form

Answer

Energy is lost every time it is used

Question 12

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

Accepted Answer

Fossil fuels

Answer

Solar power

Answer

Wind power

Answer

Hydroelectric power

Question 13

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

Accepted Answer

Mass

Answer

Kinetic energy

Answer

Potential energy

Answer

Thermal energy

Question 14

A car accelerates from rest to a speed of 20 m/s in 5 seconds. What is the average power developed by the car?

Accepted Answer

800 W

Answer

400 W

Answer

1600 W

Answer

3200 W

Question 15

What does the law of conservation of energy state?

Accepted Answer

Energy can be transformed from one form to another.

Answer

Energy can be created or destroyed.

Answer

Energy is always constant.

Answer

Energy is always decreasing.

Question 16

Which of the following is the correct formula to calculate kinetic energy?

Accepted Answer

Ek = 1/2 mv^2

Answer

Ep = mgh

Answer

P = F/t

Answer

W = F . d

Question 17

Identify the SI unit for power.

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Kilogram

Question 18

Which force is an example of a non-conservative force?

Accepted Answer

Friction

Answer

Gravity

Answer

Tension

Answer

Elastic force

Question 19

Which factor does NOT influence the potential energy of an object?

Accepted Answer

Volume of the object

Answer

Mass of the object

Answer

Height of the object above the ground

Answer

Acceleration due to gravity

Question 20

Which of the following energy sources is renewable?

Accepted Answer

Hydroelectric power

Answer

Fossil fuels

Answer

Nuclear power

Answer

Coal

Question 21

Which action is NOT an effective energy conservation measure?

Accepted Answer

Leaving windows open in winter

Answer

Turning off lights when leaving a room

Answer

Using public transportation instead of driving

Answer

Insulating your home

Question 22

Name the three main ways energy can move from one object or system to another.

Accepted Answer

Conduction, Convection, Radiation

Answer

Kinetic Energy, Potential Energy, Heat

Answer

Friction, Work, Magnetism

Answer

Sound, Light, Chemical Reactions

Question 23

Which of the following best defines the power of a machine?

Accepted Answer

Rate at which the machine performs work

Answer

Force exerted on the machine

Answer

Energy stored within the machine

Answer

Efficiency of the machine

Question 24

Which of the following does NOT influence an object's kinetic energy?

Accepted Answer

Temperature

Answer

Mass

Answer

Velocity

Answer

Height

Question 25

A ball dropped from 20 meters will have what velocity just before impact?

Accepted Answer

28 m/s

Answer

14 m/s

Answer

20 m/s

Answer

40 m/s

Question 26

Which device converts electrical energy into kinetic energy?

Accepted Answer

Electric motor

Answer

Battery

Answer

Generator

Answer

Transformer

Question 27

If a machine with an 80% efficiency uses 100 Joules of input energy, how much output energy is produced?

Accepted Answer

80 Joules

Answer

20 Joules

Answer

120 Joules

Answer

180 Joules

Question 28

Which of the following is a renewable energy source?

Accepted Answer

Solar

Answer

Coal

Answer

Oil

Answer

Natural gas

Question 29

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

Accepted Answer

Energy

Answer

Kinetic energy

Answer

Potential energy

Answer

Thermal energy

Question 30

A ball is thrown vertically upwards. At the highest point of its trajectory, what type of energy does it possess?

Accepted Answer

Only potential energy

Answer

Only kinetic energy

Answer

Both kinetic and potential energy

Answer

Neither kinetic nor potential energy

Question 31

Which factors influence the amount of kinetic energy an object has?

Accepted Answer

Both mass and velocity

Answer

Mass

Answer

Velocity

Answer

Height

Question 32

Which device converts electrical energy into mechanical energy?

Accepted Answer

Motor

Answer

Battery

Answer

Generator

Answer

Transformer

Question 33

What is the meaning of energy efficiency?

Accepted Answer

Using less energy to accomplish the same task

Answer

Producing more energy with the same resources

Answer

Converting energy into a more useful form

Answer

Storing energy for future use

Question 34

Which of the following is a unit used to measure energy?

Accepted Answer

Joule

Answer

Watt

Answer

Newton

Answer

Ampere

Question 35

Which of the following is a consequence of the law of conservation of energy?

Accepted Answer

The total energy in a closed system remains constant.

Answer

Energy can be gained or lost without affecting the system.

Answer

Energy can be created or destroyed.

Answer

Energy can only be transferred from one form to another.

Question 36

Which of the following is a renewable energy source?

Accepted Answer

Solar energy

Answer

Nuclear energy

Answer

Natural gas

Answer

Coal

Question 37

In a hydroelectric power station, which form of energy is converted into electricity?

Accepted Answer

Gravitational potential energy

Answer

Chemical energy

Answer

Thermal energy

Answer

Kinetic energy

Question 38

Which of the following measures the rate of energy transfer or transformation?

Accepted Answer

Power

Answer

Energy

Answer

Force

Question 39

A car of mass 1000 kg is traveling at a speed of 10 m/s. Calculate its kinetic energy.

Accepted Answer

50 kJ

Answer

1 kJ

Answer

10 kJ

Answer

1000 kJ

Question 40

Identify the option that is NOT a form of energy.

Accepted Answer

Momentum

Answer

Kinetic energy

Answer

Electrical energy

Answer

Potential energy

Question 41

Identify the unit of energy in the International System of Units (SI).

Accepted Answer

Joule

Answer

Newton

Answer

Kilogram

Answer

Watt

Question 42

Provide an example of potential energy.

Accepted Answer

A stretched rubber band

Answer

A flowing river

Answer

A moving car

Answer

A burning candle

Question 43

Identify a renewable energy source.

Accepted Answer

Solar energy

Answer

Natural gas

Answer

Nuclear energy

Answer

Coal

Question 44

State the law of conservation of energy.

Accepted Answer

Energy cannot be created or destroyed, only transferred or transformed.

Answer

Energy can be created from nothing.

Answer

Energy is always lost in any process.

Question 45

A car with a mass of 1000 kg is traveling at a speed of 10 m/s. What is its kinetic energy?

Accepted Answer

50,000 J

Answer

100,000 J

Answer

5,000 J

Answer

10,000 J

Question 46

A ball is thrown vertically upwards. At its highest point, what type of energy does it possess?

Accepted Answer

Potential energy

Answer

Heat energy

Answer

Kinetic energy

Answer

Sound energy

Question 47

A roller coaster car starts from rest at the top of a hill and rolls down. Assuming no energy loss due to friction, what happens to the total mechanical energy of the car?

Accepted Answer

It remains constant.

Answer

It is zero.

Answer

It decreases.

Answer

It increases.

Question 48

A 50 kg object is lifted 2 meters vertically. How much work is done against gravity?

Accepted Answer

980 J

Answer

490 J

Answer

100 J

Answer

1960 J

Question 49

A machine does 1000 J of work in 5 seconds. What is its power output?

Accepted Answer

200 W

Answer

500 W

Answer

2000 W

Answer

5000 W

Question 50

An object has a gravitational potential energy of 100 J when held at a certain height above the ground. If its height is doubled, what is its new potential energy?

Accepted Answer

200 J

Answer

400 J

Answer

50 J

Answer

100 J

Question 51

Two objects, A and B, have the same kinetic energy. Object A has twice the mass of object B. Which statement is true about their speeds?

Accepted Answer

Object B is moving √2 times faster than object A.

Answer

They have the same speed.

Answer

Object A is moving twice as fast as object B.

Answer

Object B is moving four times faster than object A.

Question 52

A spring is compressed, storing potential energy. When released, what type of energy is this potential energy primarily converted into?

Accepted Answer

Kinetic energy

Answer

Heat energy

Answer

Light energy

Answer

Sound energy

Question 53

A 10 kg object is moving with a velocity of 5 m/s. If its velocity is doubled, what happens to its kinetic energy?

Accepted Answer

It becomes four times larger.

Answer

It is halved.

Answer

It doubles.

Answer

It remains the same.

Question 54

Which of the following is a unit of power?

Accepted Answer

Watt

Answer

Newton

Answer

Joule per second

Answer

Joule