Magnetic Fields Flashcards
What is Magnetic Flux Density, what is it unit
A measure of the strength of the magnetic field
Tesla (T)
Define a Tesla
A force of 1 N on 1 metre of wire carrying 1 A of current perpendicular to a magnetic field
What is a magnetic field
A force field surrounding a magnet or a current carrying wire
What does a magnetic field line show
The line along which a north pole would move in the field
What is the right hand grip rule
Shows direction of field around a current carrying field
How to find the magnitude of force (F) when the wire of length l, carrying a current I, is placed into a field of flux density B, so that field is perpendicular to the current,
F = BIL
What happens when a current carrying wire is placed in an external magnetic field
How to know the properties of what happens
A force is exerted on the wire
Use Fleming’s left hand rule to get direction
Thrust of motion is the force
What is the magnetic field pattern around a bar magnet
