Magnetic Fields

Question 1

What is Magnetic Flux Density, what is it unit

Answer 1

A measure of the strength of the magnetic field

Tesla (T)

Question 2

Define a Tesla

Answer 2

A force of 1 N on 1 metre of wire carrying 1 A of current perpendicular to a magnetic field

Question 3

What is a magnetic field

Answer 3

A force field surrounding a magnet or a current carrying wire

Question 4

What does a magnetic field line show

Answer 4

The line along which a north pole would move in the field

Question 5

What is the right hand grip rule

Answer 5

Shows direction of field around a current carrying field

Question 6

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,

Answer 6

F = BIL

Question 7

What happens when a current carrying wire is placed in an external magnetic field

How to know the properties of what happens

Answer 7

A force is exerted on the wire

Use Fleming’s left hand rule to get direction

Thrust of motion is the force

Question 8

What is the magnetic field pattern around a bar magnet

Answer 8