P4.2.1 - Uses Of Magnetism Flashcards
1
Q
What happens when you combine the field due to a wire with a field due to a permanent magnet?
A
It produces a force on the wire
2
Q
What happens when you put two fields in the same directions together?
A
They add up
3
Q
What happens when you put two fields in opposite directions together?
A
They will cancel out
4
Q
How does Fleming left hand rule work?
A
Thumb - Direction of force
First Finger - Direction of field (north to south)
Second Finger - Direction of current
5
Q
What is the equations of the force on a conductor (at 90 degrees to a magnetic field) carrying a current(N)?
A
Magnetic Flux Density(T) x Current(A) x Length(M)
