Magnetism

Front

What type of field does the Earth produce?

Back

Magnetic field.

Front

What is the area around a bar magnet called?

Back

Magnetic field.

Front

What can demagnetize permanent magnets when heated past the Curie point?

Back

Heating.

Front

How can we visualize invisible magnetic fields?

Back

Using iron filings.

Front

What happens when two North poles or two South poles of magnets face each other?

Back

They repel each other.

Front

What is the term for materials that can be magnetized?

Back

Ferromagnetic materials.

Front

What is the unit of measurement for magnetic field strength?

Back

Tesla (T).

Front

What is the principle behind electromagnets?

Back

Electric current creates a magnetic field.

Front

What happens to the magnetic field when the electric current is turned off in an electromagnet?

Back

The magnetic field disappears.

Front

What is the relationship between electricity and magnetism?

Back

They are interrelated; changing magnetic fields can induce electric currents.