🧲 2025 Magnetism

exams

What is a magnet?

An object that attracts materials containing iron, nickel, or cobalt.

What are the poles of a magnet?

The north and south ends, where magnetic force is strongest.

What happens when like poles are brought together?

They repel.

What happens when unlike poles are brought together?

They attract.

What is a magnetic field?

The region around a magnet where magnetic forces act.

What is Earth’s magnetic field used for?

Navigation—it makes compass needles point north.

What is an electromagnet

A magnet created by running electric current through a wire coil.

How can you make an electromagnet stronger?

Add more coils or increase the electric current.

Name a use of electromagnets.

in motors, doorbells, and cranes for lifting metal.

How are magnets used in technology?

In speakers, generators, and compasses.