Quiz about Electricity and Magnetism Review

Question 1

The force or push that causes electric charges to move is called ______ .

Accepted Answer

voltage difference

Answer

resistance

Answer

static electricity

Answer

current

Question 2

A material through which electrons do NOT flow easily is a(n) ______.

Accepted Answer

insulator

Answer

conductor

Answer

fuse

Answer

circuit breaker

Question 3

Which of the following statements about electric charge is true?

Accepted Answer

Electrical forces act at a distance.

Answer

Objects must be touching on another to exert electrical force.

Answer

Air cannot conduct electricity; it is conducted only by solid materials.

Answer

Opposite electric charges always repel one another.

Question 4

Ms. Rekosh and her class are conducting an experiment. The class needs to choose a good insulator. Which of the following could be used as an insulator?

Accepted Answer

plastic plate

Answer

silver spoon

Answer

copper wire

Answer

gold necklace

Question 5

Which of the following will increase the resistance of a wire?

Accepted Answer

increasing the temperature of the wire

Answer

using a thicker/wider wire

Answer

using a shorter wire

Answer

using silver instead of copper

Question 6

What is the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms?

Accepted Answer

45 amps

Answer

1.8 amps

Answer

0.022 amps

Answer

8.8 amps

Question 7

Which two areas of physical science are closely related to the development of electric motors and generators?

Accepted Answer

electricity and magnetism

Answer

sound and light

Answer

light and magnetism

Answer

electricity and sound

Question 8

Which of the following will decrease the strength of the magnetic field around a wire?

Accepted Answer

using less loops around the iron core

Answer

increasing the current flowing through the wire

Answer

flipping the direction of the current flowing through the wire

Answer

using a larger iron core

Question 9

Silver has a resistance of 0.0198 ohms. What voltage would produce a current of 100 amps?

Accepted Answer

1.98 V

Answer

5050 V

Answer

0.000198 V

Answer

100.0198 V

Question 10

This contains a piece of metal that melts if it gets too hot in order to open a circuit.

Accepted Answer

fuse

Answer

conductor

Answer

insulator

Answer

circuit breaker

Question 11

The function of a generator is to change ______

Accepted Answer

mechanical energy to electrical energy

Answer

chemical energy to electrical energy

Answer

electrical energy to chemical energy

Answer

electrical energy to mechanical energy

Question 12

This exerts a force that causes other electric charges to move.

Accepted Answer

electrical fields

Answer

electrical poles

Answer

insulators

Answer

conductors

Question 13

Which circuit below contains the greatest voltage?

Accepted Answer

A circuit with a current of 25 amps and a resistance of 16 ohms

Answer

A circuit with a current of 20 amps and a resistance of 16 ohms

Answer

A circuit with a current of 10 amps and a resistance of 10 ohms

Answer

A circuit with a current of 20 amps and a resistance of 10 ohms

Question 14

Magnetic Force is a Contact Force.

Accepted Answer

False

Answer

True

Question 15

Which of the following objects would NOT be a good insulator of electric charge?

Accepted Answer

skin

Answer

plastic

Answer

wood

Answer

rubber

Question 16

The Law of Conservation of Charge states that _____.

Accepted Answer

charge cannot be created and destroyed but it can be transferred.

Answer

charge can be created and destroyed but NOT transferred.

Answer

charge cannot be created and destroyed and it cannot be transferred.

Answer

none of the answers

Question 17

Alexandra was preparing to go on a hike in the woods. She gathered the equipment she would need and placed it on the kitchen counter. By chance, she placed her compass near an electrical outlet. Although the compass was not moving, the compass needle turned because ______.

Accepted Answer

the electric current in the outlet produced a magnetic field

Answer

the kitchen counter was made of a magnetic substance

Answer

the compass could only be used outdoors

Answer

the kitchen had a microwave oven

Question 18

In a closed circuit containing one resistor and a battery, if the voltage in the battery increases, the current going through the resistor increases. Why does this occur?

Accepted Answer

As the electrons are pushed more by the battery, they move faster through the circuit.

Answer

As the electrons are sped up, they bunch closer together.

Answer

As the electrons have more energy, they vibrate more rapidly.

Answer

As the distance around the circuit increases, the electrons take longer to travel around.

Question 19

If you add another light bulb in a series circuit, the other bulbs will

Accepted Answer

get dimmer

Answer

get brighter

Answer

stay the same

Answer

break

Question 20

Laser printers work with the use of heat and positive and negative charges. The laser etches a negative charge on spots of the printer drum in the form of text or images. The plastic ink dust is attracted to the places on the drum with this negative charge. What is the charge of the plastic ink dots themselves?

Accepted Answer

positive

Answer

electron

Answer

neutral

Answer

negative

Question 21

Magnets have a north and a south ___________

Accepted Answer

pole

Answer

shape

Answer

color

Answer

region

Question 22

The strongest area of magnetic field of a magnet is...

Accepted Answer

the poles

Answer

the bars

Answer

the force field

Answer

the middle

Question 23

If you wrap more coils around an electromagnet, it will become...

Accepted Answer

stronger

Answer

brighter

Answer

weaker

Answer

dimmer

Question 24

What happens if you line the magnets up so that two of the same poles face each other? (ex. North Pole & North Pole)

Accepted Answer

They will repel

Answer

They will attract

Question 25

This is an example of what type of circuit?

Accepted Answer

parallel

Answer

simple

Answer

complex

Answer

series

Question 26

This is the circuit symbol for ...

Accepted Answer

battery

Answer

lamp

Answer

motor

Answer

closed switch

Question 27

this is the symbol for a _____?

Accepted Answer

switch

Answer

battery

Answer

lamp

Answer

motor

Question 28

Static electricity is an electric charge caused by friction that can build up on a material or surface. One example of static electricity is:

Accepted Answer

lightening

Answer

solar power

Answer

magnetism

Answer

carpet

Question 29

The geographical North Pole of the Earth is closest to __________.

Accepted Answer

Magnetic South Pole

Answer

compass

Answer

Magnetic North Pole

Answer

Geographical South Pole

Question 30

This type of magnet is called

Accepted Answer

horseshoe magnet

Answer

bar magnet

Answer

disc magnet

Answer

donut magnet

Question 31

A wire with a current running through it has a magnetic field.

Accepted Answer

True

Answer

False

Question 32

An example of an electromagnet is:

Accepted Answer

metal detector

Accepted Answer

hair dryer

Answer

car

Answer

flashlight

Question 33

A temporary magnet is when the ___________ line up for a short time.

Accepted Answer

domains

Answer

electric current

Answer

electrons

Answer

magnetic fields

Question 34

Magnetic field lines are drawn with

Accepted Answer

arrows point North to South

Answer

lines radiating out

Answer

lines around the poles

Answer

arrows point South to North

Question 35

Based on this image, the poles on these two magnets are:

Accepted Answer

both north

Answer

both south

Answer

one north and one south

Answer

not enough information to know

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