Electricity and Magnetism Review

Front

What is the function of a compass?

Back

A compass works with a magnetic field to determine direction.

Front

What interferes with a compass's accuracy when near power lines?

Back

The electric current running through the power lines interferes with the magnetic field.

Front

What happens when you wrap insulated copper wire around an iron rod and connect it to a battery?

Back

The iron rod becomes an electromagnet and can attract magnetic objects like paper clips.

Front

What causes paper clips to fall off an iron rod wrapped with copper wire?

Back

Switching off the circuit stops the electric current, causing the paper clips to fall off.

Front

Where is the magnetic field strongest in a magnet?

Back

At the poles of the magnet.

Front

What occurs when a neutral balloon is rubbed with a cloth?

Back

The balloon gains a negative charge through friction.

Front

What happens when a negatively charged object comes into contact with a positively charged object?

Back

They will attract each other.

Front

What is static electricity?

Back

Static electricity is the buildup of electric charge on the surface of objects.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

Front

What is the role of electric current in creating a magnetic field?

Back

Electric current flowing through a wire generates a magnetic field around the wire.