Physics Unit 9 - Magnetism and Modern Physics (Practice)

Front

What is the magnetic pole that points to the geographic north?

Back

The north pole of the magnet.

Front

What is the primary source of energy radiated by stars like the sun?

Back

Fusion reactions.

Front

What is a coil of wire with an electric current in it called?

Back

A solenoid.

Front

What device increases or decreases the voltage of an alternating current?

Back

Transformer.

Front

Why do power companies prefer to transmit electricity using AC power?

Back

AC power can travel over longer distances.

Front

What is magnetism?

Back

A physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.

Front

What is the difference between AC and DC current?

Back

AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction.

Front

What is a magnetic field?

Back

A region around a magnet where magnetic forces can be observed.

Front

What is electromagnetic induction?

Back

The process of generating electric current from a changing magnetic field.

Front

What is a transformer used for?

Back

To change the voltage of alternating current.