Electricity and Electromagnetism

The strength of an electromagnet can be ____________ by reducing the number of turns on the wire coil.

• increased

• decreased

• expressed

• found

An electric ___________ is used to change mechanical energy into electrical energy.

• motor

• generator

• switch

• battery

Moving a wire through a ___________________ creates a current in the wire.

• steel ring

• magnetic field

• electrical field

• circular motion

Current from the power line must have the voltage _________________ with a transformer before run to your home.

• decreased

• increased

• resolved

• resisted

Type of magnet that only works in an electric field.

• permanent

• temporary

Keeps magnetic properties for a long time.

• permanent magnet

• temporary magnet

Can pick up metals made of iron, nickel or cobalt.

• permanent magnet

• temporary magnet

• both

Contains a magnetic field.

• permanent magnet

• temporary magnet

• both

Turning the blender to make a smoothie.

• chemical energy to mechanical energy

• electrical energy to mechanical energy

• mechanical energy to electrical energy

• electrical energy to light

Using windmills to generate electricity.

• mechanical energy to electrical energy

• electrical energy to mechanical energy

• electrical energy to thermal energy

• chemical energy to electrical energy