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

current

Answer

static electricity

Question 2

Electric charges always flow from _____ areas to _____ areas.

Accepted Answer

negative, positive

Answer

positive, negative

Answer

positive, neutral

Answer

neutral, negative

Question 3

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

Accepted Answer

insulator

Answer

fuse

Answer

conductor

Answer

circuit breaker

Question 4

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 5

Mr. Robinson and his 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 6

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 7

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 8

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

electricity and sound

Answer

light and magnetism

Question 9

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 10

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

Accepted Answer

1.98 V

Answer

0.000198 V

Answer

5,050 V

Answer

100.0198 V

Question 11

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 12

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 13

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

Accepted Answer

electrical fields

Answer

electrical poles

Answer

insulators

Answer

conductors

Question 14

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 15

What process is the method by which a neutral object obtains an electrical charge from a distance?

Accepted Answer

induction

Answer

convection

Answer

conduction

Answer

radiation

Question 16

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

Accepted Answer

skin

Answer

wood

Answer

plastic

Answer

rubber

Question 17

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 above

Question 18

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 compass could only be used outdoors

Answer

the kitchen counter was made of a magnetic substance

Answer

the kitchen had a microwave oven

Question 19

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 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

postive

Answer

electron

Answer

negative

Answer

neutral

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