Magnetic Fields

Question 1

Define a tesla

Answer 1

The strength of the magnetic field that produces a force of 1 newton in a wire of length 1m with 1 ampere.

Question 2

Magnetic field

Answer 2

A region surrounding a magnet or current-carrying wire that will exert a force on any other magnet or current-carrying wire placed within it

Question 3

Magnetic flux

Answer 3

A value which describes the magnetic field or the field lines passing through an area. It is the product of magnetic flux density and the perpendicular area is passes through.

Question 4

Magnetic flux density

Answer 4

The force per unit current per unit length on a current carrying wire placed at 90 degrees to the field lines.

Question 5

Magnetic Flux Linkage

Answer 5

The magnetic flux multiplied by the number of turns, N, of the coil

Question 6

Motor effect

Answer 6

When a current-carrying wire is placed within a magnetic field (non-parallel to the field lines) and experiences a force perpendicular to both the wire and the field lines