Electric and Magnetic Forces Review

Vocabulary

100

Matter with a surplus or deficiency of electrons.

Charged Object

200

An object with a force that can attract or repel certain materials is called a ________

Magnet

300

A directional flow of electrical charge

current

400

A region of magnetic force around a magnet is a ______.

Magnetic field

500

A magnet created from the flow of electricity.

Electromagnet

Miscellaneous

100

True or false. Magnets attract objects made of glass.

False

200

Charges that are the same_______ each other. Charges that are different_______ each other.

Repel, Attract

300

A compass can be used to find directions because its needle lines up with Earth’s ______________

magnetic poles

400

Electrons are tiny magnets. True or False?

True.

500

A clump of magnetic atoms is called a domain. True or False.

True.

All About Magnets

100

Which would be attracted to a magnet? A plastic button, a wooden toothpick, a rubber band, or a paper clip?

A paper clip

200

Which pair of magnetic poles attracts one another?

Opposites!! One north, one south

300

What is the difference between a permanent magnet and an electromagnet?

An electromagnet is a temporary magnet and can be turned off.

400

When a north pole and north pole of two magnets are near each other they will ________.

Repel

500

How does the distance that an object is from a magnet affect the magnetic force on the object?

The farther away, the less magnetic force.

All About Electricity

100

Electricity is the flow of ______.

Electrons.

200

___________ are gained or lost to produce an electrical charge.

Electron

300

Jeremy moves a magnet inside a copper wire coil.  What does he generate?  

Electric current

400

A fundamental property that causes electric and magnetic interactions?

Electric Charge

500

Ohm's law states the amount of power(watts) is equal to the product of voltage and current (amps). True or False.

True

All About Electromagnets!

100

What are the 3 simplest items to create an electromagnet from?

Power source (battery), wire, metal core (nail)

200

Electricity produces a _______.

magnetic field

300

Based on previous evidence in class, which of the following electromagnets will pick up the most paperclips?

A. Electromagnet with 30 coils

B. Electromagnet with 50 coils

C. Electromagnet with 80 coils

C. Electromagnet with 80 coils

Increasing the amount of coils will increase the strength of the electromagnet.

400

Give two ways to create a magnetic field.

Through an electric current or through a magnet itself.

500

Name at least two different factors that can affect the strength of an electromagnet.

Amount of current, voltage, size of wire, material wire is made from, etc.