Electricity and Magnetism Unit Review

Front

Electrons have a ________ charge.

Back

negative

Front

How can you increase the strength of the motor?

Back

Increase the number of coils of wire within the two sections of the motor.

Front

In a lightning storm, the bottom of a cloud gains a strong negative electric charge. What would you expect to observe at the top of a tall metal pole directly under the cloud?

Back

The top of the pole would have a positive charge due to induction.

Front

How can electricity be generated using only a copper wire and a bar magnet?

Back

You could bend the wire into a coil and then move the magnet back and forth in the coil to generate an electrical current.

Front

The energy transformations that take place within a generator are

Back

mechanical to electrical.

Front

What is the unit of electric current?

Back

Ampere (A)

Front

What is the relationship between voltage, current, and resistance in a circuit?

Back

Ohm's Law: V = I × R (Voltage = Current × Resistance)

Front

What is a conductor?

Back

A material that allows electric charges to flow through it easily, such as copper.

Front

What is an insulator?

Back

A material that does not allow electric charges to flow through it easily, such as rubber.

Front

What is static electricity?

Back

The buildup of electric charge on the surface of objects.