Unit 8 Test Review

A ________ is a device that converts motion into electrical energy.

• generator

• motor

• inductor

• inverter

A ________ is a device that converts electrical energy in to motion.

• generator

• motor

Examples of items that use electric motors (select all that apply)

• fan

• mechanical pencil sharpener

• treadmill

• paper fan

Direct current is DC and is used mainly in: (choose all correct answers)

• 
  batteries

• 
  battery-operated devices

• 
  homes

• 
  buildings

Alternating current is AC and is used mainly in: (choose all correct answers)

• 
  batteries

• 
  battery-operated devices

• 
  homes

• 
  buildings

We know that magnets attract and repel, creating motion; add the fact that electricity can create a magnet and we have invented...

• a lightbulb

• an electric motor

These magnets will...

• repel

• attract

• spin

An _______________ is a powerful magnet that can be turned on and off using electricity.

• neodymium magnet

• electromagnet

• bar magnet

The formula for calculating electric current:

• I = V/R

• C=AxH

• P=IV

Ampere gave his name to amperes or amps--the unit of electric _______________.

• voltage

• current

• length

• wattage