3.3.1 The motor effect

Question 1

What is produced when a current flows through a wire?

Answer 1

When a current flows through a wire a magnetic

field is produced around the wire.

Question 2

How can you increase the size of this force?

Answer 2

■ increasing the strength of the magnetic field

■ increasing the size of the current

Question 3

When will a conductor not feal a force?

Answer 3

The conductor will not experience a force if it is

parallel to the magnetic field.

Question 4

How can you change the direction of the force?

Answer 4

The direction of the force is reversed if either the
direction of the current or the direction of the
magnetic field is reversed.