Quiz about Electricity and Magents Unit Review

Question 1

When Izla and Mia rub balloons on their hair and then try to bring them close to each other, the balloons repel each other. This indicates that the balloons have the same charges.

Accepted Answer

True

Answer

False

Question 2

Opposite charges on a magnet

Accepted Answer

attract

Answer

repel

Question 3

During the science class, Arya, Abigail, and Lily are learning about magnets. They are asked about the properties of magnets. What are these properties?

Accepted Answer

All of the above

Answer

Attracts iron and materials containing iron

Answer

One end of the magnet will always point north

Answer

Attracts or repels other magnets

Question 4

Where is the strongest magnetic field on this magnet?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 5

What are the two ways to increase the magnetic field of an electromagnet?

Accepted Answer

Increase the electric current and the number of turns in the coil

Answer

Use a coil made of copper and a core of aluminum

Answer

Change the battery and use a thicker wire

Answer

Increase the size of the core and reduce the electric current

Question 6

Which of the following allows free movement of electric charges?

Accepted Answer

Conductors

Answer

Insulators

Answer

Semiconductors

Answer

Resistors

Question 7

What do opposite charges do?

Accepted Answer

Attract

Answer

Repel

Answer

Leave

Answer

Leak

Question 8

Neutrons have an electric charge.

Accepted Answer

False

Answer

True

Question 9

Opposite charges attract, and like charges repel.

Accepted Answer

True

Answer

False

Question 10

Accumulation of charges on a body is called?

Accepted Answer

Static electricity

Answer

Parallel circuit

Answer

Series circuit

Answer

Static discharge

Question 11

The flow of charge is called _______ current.

Accepted Answer

electric

Answer

resistors

Answer

cables

Answer

controllers

Question 12

What is the unit that measures electrical resistance?

Accepted Answer

Ohm

Answer

Watt

Answer

Ampere

Answer

Volt

Question 13

Which of the following materials resists the flow of electric charge?

Accepted Answer

Plastic

Answer

Iron

Answer

Water

Answer

Copper

Question 14

The flow of electric charges through a material is?

Accepted Answer

Electric current

Answer

Friction

Answer

Electricity

Answer

Static electricity

Question 15

When a body has the same number of positive and negative electric charges, the body is

Accepted Answer

neutral

Answer

negative

Answer

charged

Answer

positive

Question 16

Charging by induction occurs when a charge is transferred

Accepted Answer

without contact

Answer

through direct contact

Answer

through indirect contact

Answer

without rubbing another material

Question 17

A particle with a positive charge.

Accepted Answer

Proton

Answer

Neutron

Answer

Electron

Answer

Pokemon

Question 18

Charging by conduction occurs when:

Accepted Answer

electrons are transferred from one body to another by touching

Answer

a charged body is brought near another body without touching it

Answer

electrons are pulled from one body to another

Answer

the coefficient of friction is negative

Question 19

An electrical circuit where different parts of the circuit are in separate branches is called what?

Accepted Answer

Parallel circuit

Answer

Static discharge

Answer

Conservation of charge

Answer

Ohm's Law

Question 20

What does the battery do in an electrical circuit?

Accepted Answer

The battery drives the electric current around the circuit.

Answer

The battery connects the electric current.

Answer

The battery completes the circuit.

Answer

The battery converts electrical energy into light energy.

Question 21

The difference in electrical potential energy per charge between two places in an electrical circuit is called?

Accepted Answer

Electric Voltage

Answer

Fuse

Answer

Insulator

Answer

Conductor

Question 22

What are two devices for protecting electrical circuits?

Accepted Answer

Fuses, circuit breakers

Answer

Fire extinguisher, hose

Answer

Bucket of water, fuse

Answer

Circuit breaker, circuit breaker

Question 23

What is the total resistance?

Accepted Answer

18 kilo ohms

Answer

13 kilo ohms

Answer

15 kilo ohms

Answer

19 kilo ohms

Question 24

What is the total resistance?

Accepted Answer

450 ohms

Answer

500 ohms

Answer

60 ohms

Answer

150 ohms

Question 25

What is the total resistance?

Accepted Answer

2 ohms

Answer

16 ohms

Answer

1 ohm

Answer

8 ohms

Question 26

What is the total resistance?

Accepted Answer

1 ohm

Answer

3 ohms

Answer

9 ohms

Answer

6 ohms

Question 27

What is the total electric current across the battery?

Accepted Answer

0.3 ampere

Answer

1 ampere

Answer

9 amperes

Answer

0.5 ampere

Question 28

What is the unit of current?

Accepted Answer

Ampere, A

Answer

Volt

Answer

V

Answer

Current, A

Answer

Ohm

Question 29

In a series circuit, what happens to the current?

Accepted Answer

It is equal everywhere

Answer

It increases around the circuit

Answer

It is consumed by the components

Answer

It is always equal to the voltage

Question 30

All the resistors added in a series circuit equal the total resistance.

Accepted Answer

True

Answer

False

Question 31

How do we calculate the electric voltage?

Accepted Answer

V = I x R

Answer

V = I / R

Answer

V = R + I

Answer

V = I - R

Question 32

In a parallel circuit, is the current or voltage across the resistors equal throughout the circuit?

Accepted Answer

Voltage

Answer

Current

Answer

Both

Answer

None of them

Question 33

Which example shows a parallel circuit?

Accepted Answer

Example C

Answer

Example A

Answer

Example B

Answer

Example D

Question 34

In parallel circuits:

Accepted Answer

The voltage is constant

Answer

The current is constant

Answer

R_T = R_1 + R_2

Answer

P = V x I

Question 35

What does a resistor do?

Accepted Answer

Reduces the current flow and lowers the voltage

Answer

Reduces the flow of electricity

Answer

Increases the current flow and lowers the voltage

Answer

Only fills the gaps in the circuit.

Question 36

Ohm's Law states that:

Accepted Answer

V = I x R

Answer

V = I + R

Answer

V = I/R

Answer

V = I x W

Question 37

Using Ohm's Law, find the voltage (V) when the current (I) is 120 amps and the resistance (R) is 3 ohms. Refer to the Ohm's Law triangle diagram for help.

Accepted Answer

360V

Answer

60V

Answer

120V

Answer

40V

Question 38

How can you charge by friction?

Accepted Answer

Rubbing two materials together

Answer

Touching two materials together

Answer

Bringing two objects close to each other

Answer

None of the above

Question 39

What is an example of a conductor?

Accepted Answer

Silver

Answer

Wood

Answer

Cloth

Answer

Rubber

Question 40

What is an example of a good insulator?

Accepted Answer

Rubber

Answer

Copper

Answer

Iron

Answer

Water

Question 41

What happens when the south and north poles of a magnet are put together?

Accepted Answer

They attract each other

Answer

They repel each other

Answer

Nothing happens

Answer

They balance each other

Question 42

Do these magnets attract each other or repel?

Accepted Answer

Attract

Answer

Repel

Question 43

Will these magnets attract each other or repel?

Accepted Answer

Repel

Answer

Attract

Question 44

Calculate the power when the voltage is 200 volts and the current is 10 amperes.

Accepted Answer

2000 watts

Answer

20 watts

Answer

190 watts

Answer

200 watts

Question 45

Increasing resistance means decreasing current.

Accepted Answer

True

Answer

False

Question 46

Lucas, Ava, and Sophia are playing with a magnet. They are curious to know what happens when a magnet is heated.

Accepted Answer

It loses its magnetic properties

Answer

It gains more magnetic properties

Answer

It becomes a super magnet

Answer

Nothing happens

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