Electromagnetism Inv. 3 Study Guide

Front

What does an iron nail (core) do in a circuit?

Back

It becomes a temporary magnet.

Front

True or False: Electricity flows through a core in an electromagnet.

Back

False.

Front

What energy does a D-cell have to run the circuit?

Back

Has potential energy to run the circuit.

Front

What is evidence that electricity flows? A component gets hot. Write E or X.

Back

E.

Front

Why does a compass needle change position when a circuit is closed?

Back

A magnetic field surrounds a wire when electric current flows through it.

Front

What is an electromagnet?

Back

A type of magnet in which the magnetic field is produced by an electric current.

Front

What happens to the magnetic field when the electric current is turned off in an electromagnet?

Back

The magnetic field disappears.

Front

What is the role of a switch in a circuit?

Back

To open or close the circuit, controlling the flow of electricity.

Front

What is the difference between a temporary magnet and a permanent magnet?

Back

A temporary magnet only retains its magnetism while in a magnetic field, while a permanent magnet maintains its magnetism.

Front

What is the function of a battery in a circuit?

Back

To provide electrical energy.