Electricity and Magnetism

Question 1

What is the formula for electric power?

Accepted Answer

Voltage x Current

Question 2

Electric power used in a house is measured in this unit

Accepted Answer

Kilowatt-hour

Question 3

Your Chromebook's battery can be recharged by an outlet if the cord is first plugged into this

Accepted Answer

Converter

Question 4

Electric power plants convert what kind of energy directly into electric energy?

Accepted Answer

Kinetic

Question 5

What device uses coils of wire rotating in a magnetic field to produce electricity?

Accepted Answer

Generator

Question 6

Current that regularly reverses direction is called this

Accepted Answer

Alternating Current

Question 7

A device that produces electric current through chemical reactions

Accepted Answer

Electric cell

Question 8

The process of building up a static charge without touching

Accepted Answer

Induction

Question 9

What device can be used to decrease voltage before coming into your house?

Accepted Answer

Transformer

Question 10

What is the substance in an electric cell that causes the two different metals to react?

Accepted Answer

Electrolyte

Question 11

What is the formula for electric resistance?

Accepted Answer

R = V/I

Question 12

What is the CURRENT in a circuit that has 12 volts of potential and 24 ohms of resistance?

Accepted Answer

0.5 amperes

Question 13

What is the part of a motor that reverses the magnetic field of the electromagnet?

Accepted Answer

Commutator

Question 14

The unit used to measure current is called this

Accepted Answer

Ampere

Question 15

Resistance is measured in this unit

Accepted Answer

Ohm

Question 16

A continuous flow of electric charge is called this

Accepted Answer

Electric current

Question 17

Which of the following would have the least electrical resistance?

Accepted Answer

A short, thick copper wire

Question 18

The process of giving a charge to something without directly touching it is called this

Accepted Answer

Induction

Question 19

What is the voltage of an appliance that has 2 amperes of current and 6 ohms of resistance?

Accepted Answer

12 volts

Question 20

What happens to an electromagnet's magnetic field when it is turned off?

Accepted Answer

The magnetic field disappears

Question 21

Earth's magnetic field is believed to be caused by this

Accepted Answer

The motion of the earth's core

Question 22

What direction do the electrons move in an electric cell?

Accepted Answer

From negative to positive

Question 23

Which type of current produces a fixed magnetic field?

Accepted Answer

Direct current

Question 24

Spinning the wire coil of a motor between its magnets, the motor can be turned into this

Accepted Answer

A generator

Question 25

Which technology makes a practical use of static electricity?

Accepted Answer

All of them do

Question 26

Form of electricity that moves all at once after a charge builds up

Accepted Answer

Static

Question 27

What device uses electricity to rotate coils of wire in a magnetic field?

Accepted Answer

Motor

Question 28

The unit used to measure potential difference is called this

Accepted Answer

Volt

Question 29

When a balloon rubs against a sweater, which object becomes positive?

Accepted Answer

Sweater

Electricity and Magnetism

Questions 29

Electricity and Magnetism

Questions 29