Electrons 7

Current is...

• moving protons
• moving electrons
• measured in volts
• measured in ohms

Which of the following is not a subatomic particle that makes up an atom?

• neutron

• proton

• nucleon

• electron

Protons have a ____________ charge.

• negative

• neutral

• positive

Electrons have a ____________ charge.

• negative

• neutral

• positive

A current is produced when _______________ flow in a circuit.

• protons

• neutrons

• electrons

• nucleons

What happens when an electric current flows through a wire?

• The wire begins to spin.

• Nothing happens.

• A field of gravity is created around the wire.

• A magnetic field is created around the wire.

The south ends of two magnets will _________ each other.

• repel

• attract

Opposite charges do what?

• Attract

• Repel

The area of magnetic force around a magnet is known as its ____________.

• magnetism

• magnetic current

• magnetic field

• electric current

An atom becomes _______ when it gains electrons.

• Positive

• Neutral

• Negative

• Invisible