Magnetism Flashcard

Front

What energy conversion occurs in a loudspeaker?

Back

Electrical energy is converted to mechanical energy.

Front

True or False: In electromagnetic induction, an electric current is induced by the motion of a magnet relative to a magnetic field.

Back

False. It is induced by the change in magnetic field around a conductor.

Front

What property should be increased to transmit electrical energy efficiently over long distances?

Back

Voltage should be increased.

Front

How do you calculate the output voltage of a transformer?

Back

Output Voltage = (Number of turns in secondary coil / Number of turns in primary coil) * Input Voltage.

Front

What increases the strength of an electromagnet?

Back

Increasing the number of coils of wire around the nail.

Front

Define magnetism.

Back

Magnetism is a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between 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 a transformer?

Back

A transformer is used to change the voltage of an alternating current (AC) in a circuit.

Front

What happens to the magnetic field when the current in a wire is reversed?

Back

The direction of the magnetic field also reverses.

Front

What is electromagnetic induction?

Back

Electromagnetic induction is the process of generating electric current from a changing magnetic field.