Quiz about Electricity Review

Question 1

Which material is a good conductor of electricity?

Accepted Answer

Copper

Answer

Rubber

Answer

Glass

Answer

Plastic

Question 2

What must a circuit have for electricity to flow?

Accepted Answer

A closed path

Answer

An open switch

Answer

Only one wire

Answer

A plastic insulator

Question 3

What is created when you rub a balloon on your hair?

Accepted Answer

Static electricity

Answer

Heat energy

Answer

Light energy

Answer

Sound energy

Question 4

Which of the following is an example of electrical energy being transformed into thermal energy?

Accepted Answer

A light bulb getting hot

Answer

A fan spinning

Answer

A magnet attracting paper clips

Answer

A radio playing music

Question 5

What happens when an electric current flows through a wire?

Accepted Answer

The wire creates a magnetic field

Answer

The wire becomes an insulator

Answer

The wire changes color

Answer

The wire produces sound

Question 6

Which of the following is an insulator?

Accepted Answer

Wood

Answer

Aluminum

Answer

Iron

Answer

Silver

Question 7

If a circuit is open, what will happen to the flow of electricity?

Accepted Answer

It will stop

Answer

It will flow faster

Answer

It will flow in reverse

Answer

It will create static electricity

Question 8

Which action can generate static electricity?

Accepted Answer

Rubbing a plastic comb on wool

Answer

Placing a magnet near a wire

Answer

Turning on a light switch

Answer

Pouring water on metal

Question 9

Which device transforms electrical energy into mechanical energy?

Accepted Answer

Electric fan

Answer

Light bulb

Answer

Battery

Answer

Magnet

Question 10

What is produced around a wire when current flows through it?

Accepted Answer

Magnetic field

Answer

Heat only

Answer

Light only

Answer

Sound waves

Question 11

Why is copper used in electrical wires instead of rubber?

Accepted Answer

Copper is a better conductor of electricity

Answer

Copper is lighter than rubber

Answer

Copper is more colorful

Answer

Copper is cheaper

Question 12

You have a battery, a light bulb, and wires. How can you make the bulb light up?

Accepted Answer

Connect the wires to both ends of the battery and the bulb to form a closed circuit

Answer

Connect the wires to only one end of the battery

Answer

Place the bulb on top of the battery

Answer

Wrap the wires around the bulb

Question 13

If you rub a balloon on your hair and then touch it to a wall, what is likely to happen?

Accepted Answer

The balloon will stick to the wall

Answer

The balloon will fall to the ground

Answer

The balloon will make a sound

Answer

The balloon will change color

Question 14

Which of the following shows electrical energy being changed into radiant energy?

Accepted Answer

A lamp lighting up a room

Answer

A toaster heating bread

Answer

A fan spinning

Answer

A magnet picking up nails

Question 15

How can you increase the strength of the magnetic field around a wire?

Accepted Answer

Increase the current

Answer

Use a thinner wire

Answer

Decrease the current

Answer

Use a shorter wire

Question 16

A student wants to test which materials are conductors. Which procedure should they use?

Accepted Answer

Connect each material in a simple circuit and see if a bulb lights up

Answer

Place each material in water and see if it floats

Answer

Weigh each material

Answer

Rub each material and see if it creates static electricity

Question 17

A light bulb in a circuit does not light up. What could be the reason?

Accepted Answer

The circuit is open

Answer

The circuit is closed

Answer

The wires are made of copper

Answer

The battery is new

Question 18

Why does rubbing certain materials together create static electricity?

Accepted Answer

It causes electrons to move from one material to another

Answer

It makes the materials heavier

Answer

It changes the color of the materials

Answer

It makes the materials magnetic

Question 19

Which scenario best demonstrates electrical energy being transformed into mechanical energy?

Accepted Answer

A blender mixing fruit

Answer

A radio playing music

Answer

A heater warming a room

Answer

A flashlight shining

Question 20

What would happen if you wrap a wire around a nail and connect it to a battery?

Accepted Answer

The nail will become magnetic

Answer

The nail will become hot

Answer

The nail will melt

Answer

The nail will break

Question 21

You are given four objects: a metal spoon, a plastic spoon, a wooden stick, and a glass rod. How would you determine which is the best conductor of electricity?

Accepted Answer

Test each object in a circuit to see which one allows a bulb to light up the brightest

Answer

Drop each object and see which one bounces highest

Answer

Rub each object and see which one creates the most static electricity

Answer

Weigh each object

Question 22

A student builds a circuit with a battery, a switch, and a light bulb. The bulb does not light up. What steps should the student take to find and fix the problem?

Accepted Answer

Check if the switch is closed and all connections are secure, then test each part separately

Answer

Replace the battery and try again

Answer

Add more bulbs to the circuit

Answer

Use a different color wire

Question 23

You notice that after rubbing a plastic ruler on a wool sweater, small pieces of paper are attracted to the ruler. Explain why this happens using your knowledge of static electricity.

Accepted Answer

The ruler gains an electric charge and attracts the paper

Answer

The ruler becomes magnetic

Answer

The ruler gets heavier

Answer

The ruler changes color

Question 24

A student wants to design an experiment to show how electrical energy can be transformed into thermal energy. Which setup would best demonstrate this transformation?

Accepted Answer

Connecting a battery to a small light bulb and measuring the temperature of the bulb before and after it is turned on

Answer

Using a battery to power a fan and measuring the speed of the fan

Answer

Using a battery to power a magnet and measuring its strength

Answer

Connecting a battery to a radio and measuring the volume

Question 25

You want to make a stronger electromagnet for a science project. What changes could you make to your design to increase the strength of the magnetic field produced by the current in the wire?

Accepted Answer

Use more coils of wire and a larger battery

Answer

Use fewer coils of wire and a smaller battery

Answer

Use a plastic core instead of an iron core

Answer

Use thinner wire and less current

Question 26

A teacher gives you a set of materials: copper wire, rubber tubing, and aluminum foil. How would you test which material is the best conductor?

Accepted Answer

Connect each material in a circuit with a battery and bulb, and observe which one lights the bulb the brightest

Answer

Place each material in water and see which one sinks

Answer

Rub each material and see which one creates the most static electricity

Answer

Weigh each material

Question 27

You are given a circuit with a battery, a switch, and a buzzer. The buzzer does not sound. What steps should you take to troubleshoot the circuit?

Accepted Answer

Check if the switch is closed, all connections are secure, and test each component separately

Answer

Add more batteries

Answer

Replace the buzzer with a light bulb

Answer

Use a different color wire

Question 28

A student rubs a balloon on their hair and then brings it close to small pieces of paper. The paper jumps to the balloon. Explain the science behind this observation.

Accepted Answer

The balloon gains static electricity and attracts the paper

Answer

The balloon becomes magnetic and attracts the paper

Answer

The balloon gets heavier and pulls the paper

Answer

The balloon changes color and attracts the paper

Question 29

Design an experiment to show how electrical energy can be transformed into radiant energy.

Accepted Answer

Connect a battery to a light bulb and observe the light produced

Answer

Connect a battery to a fan and measure the wind speed

Answer

Connect a battery to a heater and measure the temperature

Answer

Connect a battery to a magnet and measure its strength

Question 30

You want to make an electromagnet stronger. Which of the following would be the best way to do this?

Accepted Answer

Increase the number of coils and the current

Answer

Use fewer coils of wire

Answer

Use a plastic core

Answer

Use thinner wire

Question 31

According to this list, what is the student most likely investigating?

Accepted Answer

insulating materials

Answer

how circuits work

Answer

types of conductors

Answer

charged particles

Question 32

This simple circuit allows electricity to flow because it --

Accepted Answer

is closed

Answer

is open

Answer

has a light bulb

Answer

contains iron

Question 33

What is one example of static electricity in nature?

Accepted Answer

a bolt of lightening

Answer

heavy rain

Answer

leaves falling to the ground

Answer

bark sticking to a tree

Question 34

The transfer of negatively charged particles between materials is called --

Accepted Answer

static electricity

Answer

radiant energy

Answer

energy transformation

Answer

a simple circuit

Question 35

According to the hypothesis, what is the independent variable (IV) in this investigation?

Accepted Answer

size of balloon

Answer

pieces of confetti

Answer

amount of static electricity

Answer

number of rubs

Question 36

Which is NOT an example of the transformation of electrical energy to mechanical energy?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

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