Quiz about Topic 7 Test

Question 1

1.)  Plan a simple circuit that includes a battery, a switch, and a light bulb. Explain how energy is transferred in this circuit.

Accepted Answer

Energy is transferred from the battery to the switch and then to the light bulb

Answer

Energy is transferred from the light bulb to the battery

Answer

Energy is transferred from the switch to the battery

Answer

Energy is transferred from the light bulb to the switch

Question 2

2.)  Which of the following is a property of a good insulator?

Accepted Answer

Low electrical conductivity

Answer

High electrical conductivity

Answer

High thermal conductivity

Answer

Low thermal conductivity

Question 3

3.)  Objects that have opposite charges

Accepted Answer

are attracted to each other, and the force between the objects pulls them together.

Answer

are attracted to each other, and the force between the objects pushes them apart.

Answer

are repelled by each other, and the force between the objects pulls them together.

Answer

are repelled by each other, and the force between the objects pushes them apart.

Question 4

4.)  Which material is most likely to conduct electricity?

Accepted Answer

Copper

Answer

Rubber

Answer

Wood

Answer

Plastic

Question 5

5.) Lighting is a form of static electricity.

Accepted Answer

True

Answer

False

Answer

Maybe

Answer

I do not know.

Question 6

6.)  What types of charges attract?

Accepted Answer

Positive and Negative

Answer

Positive and Positive

Answer

Positive and Neutral

Answer

Negative and Neutral

Question 7

7.) Which of the following materials is an insulator?

Accepted Answer

Rubber

Answer

Aluminum

Answer

Copper

Answer

Silver

Question 8

8.) What happens to the magnetic field when the electric current in a wire is increased?

Accepted Answer

The magnetic field increases

Answer

The magnetic field decreases

Answer

The magnetic field remains the same

Answer

The magnetic field disappears

Question 9

9.) Choose an experiment to show how static electricity can be generated by friction.

Accepted Answer

Rub a balloon on your hair and observe the attraction to small paper pieces

Answer

Use a battery to light a bulb

Answer

Connect a wire to a magnet

Answer

Place a metal rod in water

Question 10

10.)  Mrs. Effrein rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?

Accepted Answer

The balloons will repel each other.

Answer

The balloons will attract each other.

Answer

The balloons will become positively (+) charged.

Answer

The balloons will pop.

Question 11

11.)  What happens to the resistance in a wire if its length is doubled?

Accepted Answer

The resistance is doubled

Answer

The resistance is halved

Answer

The resistance remains the same

Answer

The resistance becomes zero

Question 12

12.) What happens to the electric current in a circuit if the voltage is increased?

Accepted Answer

The current increases

Answer

The current decreases

Answer

The current remains the same

Answer

The current stops flowing

Question 13

13.)  Increasing the number of coils in an electromagnet on its strength.

Accepted Answer

The strength of the electromagnet increases

Answer

The strength of the electromagnet decreases

Answer

The strength of the electromagnet remains the same

Answer

The electromagnet stops working

Question 14

14.)  A student observes that a magnet can attract a paperclip through a piece of paper. Explain why this occurs.

Accepted Answer

The magnetic field can pass through non-magnetic materials like paper.

Answer

The paperclip is not affected by the paper.

Answer

The paperclip generates its own magnetic field.

Answer

The paper enhances the magnetic field.

Question 15

15.)  How can you increase the strength of a magnetic field produced by a solenoid?

Accepted Answer

Increase the current passing through the solenoid.

Answer

Decrease the number of coils.

Answer

Use a plastic core inside the solenoid.

Answer

Decrease the voltage applied to the solenoid.

Question 16

16.)  A student places a compass near a bar magnet. Describe what happens to the compass needle and why.

Accepted Answer

The needle aligns with the magnetic field lines of the magnet.

Answer

The needle points away from the magnet because it is repelled.

Answer

The needle spins rapidly due to the magnetic force.

Answer

The needle does not move because it is not affected by the magnet.

Question 17

24.) Electricity flows from...

Accepted Answer

Negative to Positive

Answer

Positive to Negative

Answer

Negative to Neutral

Answer

Neutral to Positive

Question 18

25.) Magnetic field lines goes from...

Accepted Answer

North to South

Answer

Push to pull

Answer

Up to down

Answer

East to west

Question 19

What do the lines around this magnet represent?

Accepted Answer

Magnetic Field

Answer

North Pole

Answer

South Pole

Answer

Magnetic Declination

Question 20

Magnetism is a type of ____________

Accepted Answer

force

Answer

book

Answer

plant

Answer

animal

Question 21

Priya and Avery are on a mission to make their own doorbell using a battery, a bell, and a switch. They notice the battery has two metal posts. Why do you think there are two metal posts on the battery?

Accepted Answer

The battery needs to form a complete circuit that starts with one metal post and ends with the other metal post.

Answer

The battery needs only one metal post to connect to the bell, but the other metal post is present in case the first post fails to work.

Answer

One metal post makes a complete circuit with the switch, and the other metal post makes a complete circuit with the bell.

Answer

One metal post makes the bell start to ring, and the other metal post makes the bell ring louder.

Question 22

Emma and Liam are on a mission to power up their science project! How can they increase the current within their circuit?

Accepted Answer

Add more batteries (increase the voltage)

Accepted Answer

Use a great conductor (decrease the resistance)

Answer

Use smaller batteries (decrease the power)

Answer

Add more light bulbs in a series (increase consumption)

Question 23

Benjamin and Sophia are exploring circuits in their science class. They come across this circuit and wonder, "Is this circuit ...........................?"

Accepted Answer

open

Answer

parallel

Answer

closed

Answer

the cutiest little circuit ever!

Question 24

True or False: A magnet is attracting when it pushes objects away from each other.

Accepted Answer

False

Answer

True

Question 25

Which way will the magnets move after they are released?

Accepted Answer

Away from each other

Answer

Towards each other

Answer

Not enough information

Question 26

Where is the force of attraction the strongest on a magnet?

Accepted Answer

at the poles

Answer

above the magnet

Answer

below the magnet

Answer

in the middle

Question 27

True or False: All metals are attracted to magnet.

Accepted Answer

False

Answer

True

Question 28

What would happen when the opposite poles of magnets are placed together?

Accepted Answer

The force will pull them together (attract).

Answer

The force will push them away from each other (repel).

Answer

The strength of the magnet is doubled.

Question 29

What would happen when two north poles of magnets are placed together?

Accepted Answer

The force will push them away from each other (repel).

Answer

The force will pull them together (attract).

Answer

The strength of the magnet is doubled.

Question 30

Look at the picture carefully.

Which screws will be attracted?

Accepted Answer

iron and steel screws

Answer

iron and aluminum screws

Answer

steel and aluminum screws

Answer

all screws

Question 31

As the distance between two magnets increases (they get farther apart), the force between them:

Accepted Answer

Decreases

Answer

Increases

Answer

Stays the Same

Question 32

This large crane magnet functions only when the electrical current is ON.  The crane magnet is an example of what type of magnet?

Accepted Answer

Electromagnet

Answer

NIB Magnet

Answer

Ceramic Magnet

Answer

funnel magnet

Question 33

There are several modern uses of magnets.  A ________________________ can have million of magnets.  Each magnet points in its own direction, making a code.  This allows an individual to make purchases.

Accepted Answer

Credit Card

Answer

Driver's License

Answer

Check Book

Answer

TV

Question 34

What would happen if you took one end of the wire off the battery?

Accepted Answer

The nail would no longer be a magnet

Answer

The nail will be a magnet.

Answer

Nothing will happened.

Answer

The nail will heats up.

Question 35

Which part of the electromagnets turned into a magnet when electricity flows through a coiled wire?

Accepted Answer

Iron Nail

Answer

Battery

Answer

Copper wire

Answer

Bulb

Question 36

In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.

Accepted Answer

electric, wire, iron

Answer

wire, iron, electric

Answer

iron, electric, wire

Answer

excited, hair, apple

Question 37

What is the role of the battery in the electromagnet?

Accepted Answer

It provides the power source for the electromagnet.

Answer

It provides light energy for the electromagnet.

Answer

It provides magnetic field for the electromagnet.

Answer

It provides sound energy for the electromagnet.

Topic 7 Test

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