Question 1

A semiconductor device that controls the flow of electricity in one direction is called ______.

Accepted Answer

a diode

Answer

a conductor

Answer

a superconductor

Answer

an insulator

Question 2

Which one converts mechanical energy into electrical energy?

Accepted Answer

a generator

Answer

a motor

Question 3

Which is not an example of an insulator?

Accepted Answer

copper

Answer

wood

Answer

plastic

Answer

rubber

Question 4

What happens if you heat a permanent magnet?

Accepted Answer

loses magnetic properties

Answer

gets stronger

Answer

stays the same

Question 5

Where is the magnetic field of a magnet the strongest?

Accepted Answer

at the poles

Answer

at the south pole only

Answer

in the center

Answer

at the north pole only

Question 6

What direction does a compass point?

Accepted Answer

north

Answer

west

Answer

south

Answer

east

Question 7

A superconductor

Accepted Answer

has zero resistance

Answer

has a lot of resistance

Question 8

An electric motor coverts

Accepted Answer

electrical energy to mechanical

Answer

mechanical energy to electrical

Question 9

Wrapping a copper wire around a iron and attaching it to a battery creates

Accepted Answer

an electromagnet

Answer

a magnet

Answer

a series circuit

Answer

a parallel circuit

Question 10

What does a transistor do?

Accepted Answer

turns electrical flow on and off

Answer

is an insulator

Answer

creates a magnet

Question 11

An insulator

Accepted Answer

does not allow electrons to flow

Answer

does allow electrons to flow

Question 12

A light emitting diode (LED is a

Accepted Answer

semiconductor

Answer

superconductor

Question 13

Transistors and semiconductors are used to

Accepted Answer

amplify electrical signals

Answer

insulate signals

Answer

create a magnetic field

Question 14

Electric bills are calculated in

Accepted Answer

kilowatt hours

Answer

newtons

Answer

volts

Answer

joules

Question 15

In magnets

Accepted Answer

opposites attract

Answer

opposites repel

Answer

like charges attract

Question 16

Static builds up on laundry in a dryer because

Accepted Answer

electrons are being transferred

Answer

clothes have metal in them

Answer

heat produces electricity

Question 17

Solar cells found on solar panels are made of

Accepted Answer

semiconductor diodes

Answer

insulators

Answer

conductors

Question 18

An example of a semiconductor is

Accepted Answer

silicon

Answer

water

Answer

plastic

Answer

nickel

Question 19

Which of the following is not an example of a conductor?

Accepted Answer

wood

Answer

salt water

Answer

iron

Answer

steel

Question 20

What law explains the resistance is equal to voltage divided by current?

Accepted Answer

Ohms Law

Answer

Newtons Law

Answer

Joules Law

Answer

Nyes Law

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