S4.6.3 Glossary

Question 1

Attract

Answer 1

When two oppositely charged particles pull together

Question 2

Compass

Answer 2

A small suspended bar magnet which aligns with the Earth’s magnetic field

Question 3

Current

Answer 3

The flow of electrons through a conductor

Question 4

Direct current

Answer 4

Current which only flows in one direction

Question 5

Electromagnet

Answer 5

A solenoid with an iron core

Question 6

Induced magnet

Answer 6

A magnet which is only magnetic when placed inside a magnetic field

Question 7

Magnetic field

Answer 7

The area around a magnet where the magnetic force is felt

Question 8

Magnetic flux density

Answer 8

A measure of the strength of magnetism, measured in Tesla

Question 9

Motor effect

Answer 9

The effect where a force is exerted on a wire carrying a current in a magnetic field.

Question 10

Permanent magnet

Answer 10

A magnet which produces its own magnetic field

Question 11

Pole

Answer 11

The end of a magnet where the force is strongest

Question 12

Repel

Answer 12

When two oppositely charged particles push away

Question 13

Solenoid

Answer 13

A coil of wire which carries a current

Question 14

Split ring commutator

Answer 14

A device which reverses the current in an electric motor every half turn