The ancient Greeks discovered a rock called ___ attracted materials containing iron.

A north pole and a south pole would

The relationship between electricity and magnetism is called

A coil of wire with a current is called a ___

Electrical energy is transformed into mechanical energy in a

A galvanometer is a device that measures

A device that changes the voltage of alternating current is a

What happens when a magnet moves through a coil of wire?

The more loops a solenoid has,

What happens to the current in the armature of an electric motor when the commutator moves to a different brush?

Who discovered that an electric current produces a magnetic field?

Moving a wire coil upward in a magnetic field makes the needle of a galvanometer go left. What happens if we move the coil down?

An induced current will continue flowing after the movement of the magnet or coil stops.

Increasing the current in a solenoid of an electromagnet would

The north and south poles of a solenoid change with

The energy an object has due to its movement or position is called

Any material that exerts magnetic force is considered

A ___ is a device that has a magnetized needle that can spin freely

Magnetic field lines are closest together at

___ is the angle between geographic north and the north to which a compass needle points.

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