Forces On A Wire + Flemings Left Hand Rule Flashcards
(10 cards)
How do we know that a wire is experiencing a force
If the magnetic field around a wire interacts with the the field between the magnets
What’s the motor effect
When a force makes the wire move in a direction
How do we find the force value
F = B x I x l
Force = magnetic flux density x current x length
N T A m - Units
What does the force value equation apply to
A wire at a right angle to the magnetic field
What’s magnetic flux density
Measure of the strength of the magnetic field
What factors affect the size of the force
Magnetic flux density
Current
Length
How to find the direction of a force
Flemings left hand rule
What do the fingers represent in the left hand rule
First finger - direction of field (N to S)
Second finger - direction of conventional current (+ to -)
Thumb - direction of motion (force)
If the conductors parallel to the magnetic field it will…
Not experience a force
