P4.2.1 - Currents And Forces

Question 1

What happens if you put two magnetic fields that are in opposite directions together?

Answer 1

They cancel each other out

Question 2

What is a ‘catapult field’?

Answer 2

A catapult field is a magnetic field where the lines above the wire are stretched and there are few lines below the wire

Question 3

What does Fleming’s hand rule do?

Answer 3

Helps you remember which way the wire moves

Question 4

Describe Fleming’s left hand rule.

Answer 4

Your thumb is force.
Your index is the field (N->S)
Your middle is current (+->-)
Using your left hand, move your fingers in the correct direction so they are all at 90 degrees to each other