At a distance/ Non-contact Forces

What is the unit of electric charge?

• Volts

• Amps

• Coulombs

• Ohms

As electrons move, they make

• A. electromagnetism.

• B. auroras.

• C. ferromagnetism.

• D. magnetic fields.

A compass needle responds to a magnetic field, because the compass needle is a

• A. generator.

• B. motor.    

• C. magnet.

• D. transformer.

What is created when a magnet moves through a coil of wire?

• A. an electromagnet

• B. a ferromagnet

• C. a solenoid

• D. an electric current

The closer the charges, the ___________ the force between them

• closer

• further

• stronger

• weaker

If 2 magnets push away from each other what is it called?

• Attract

• Iron

• Repel

• None of the above

Protons are ______ charged and neutrons have ______ charged.

• Positive, negative

• Positive, neutral

• Negative, Positive

• Neutral, negative

Electrons have a:

• Negative charge

• Neutral charge

• Positive charge

What kind of magnet can be turned on and off? (Man-made magnet)

• refrigerator magnet

• electromagnet

• magnetite

• iron

How is Earth's magnetic field similar to that of a magnet?

• It is hundreds of miles long

• It has north and south poles

• It is made in Earth's core

• It is shaped like a horseshoe