The diagram shows a long wire placed between the poles of a magnet. When current I flows in the wire, a force acts on the wire causing it to move.

a. Use Fleming's left-hand rule to find the direction of the force on the wire. Copy the diagram and show the direction of the force on your copy with an arrow labelled F.

b. State what happens to the force on the wire when

i. The size of the current in the wire is increased,

ii. A weaker magnet is used,

iii. The direction of the current is reversed.

c. Name one practical device which uses this effect.

Transcribed Image Text:

N wire current I