Alternating & direct current

The electricity in our house is

• AC

• DC

• BC

• AD

current is measured in....

• volts
• amps
• watts
• mph

An electric current that continually reverses direction over time is known as a(n)

• direct current

• alternating current

• simple current

An electric current flowing in one direction only

• voltage

• parallel current

• direct current

• electric current

Quantity of charge can be measured in

• time (s)

• Ampere (A)

• coulombs (C)

• Joule (J)

Electric currents passing through wires will produce a(n)

• solenoid

• magnet

• magnetic field

• insulator

A device that uses an electromagnet to measure electric current is a(n) ____.

• generator
• commutator
• galvanometer
• electric motor

The function of an electric motor is to change ____.

•  mechanical energy to electrical energy
• electrical energy to chemical energy
• chemical energy to electrical energy
• electrical energy to mechanical energy 

The function of a generator is to change ____. 

• mechanical energy to electrical energy
• electrical energy to mechanical energy 
• electrical energy to chemical energy
• chemical energy to electrical energy 

A dry-cell battery produces ____.

•  an alternating current
• a direct current
• both direct and alternating current
• the same current that a generator produces