26 - Electromagneti induction

Question 1

Define magnetic flux density

Answer 1

the force experienced by a current-carrying conductor in a magnetic fields per unit length, per unit current, when the current is perpendicular to the directions of the fields

Question 2

Magnetic flux

Answer 2

the product of magnetic flux density normal to a circuit and the cross-sectional area of the circut

Question 3

Magentic flux equation

Answer 3

ϕ = BA

Question 4

Define magnetic flux linkage

Answer 4

the product of magnetic flux and the number of turns

Question 5

Magnetic flux linkage equation

Answer 5

Magnetic flux linkage = ϕN
Magnetic flux linkage = BAN cosine

Question 6

Define Faraday’s law

Answer 6

the magnitude of the induced e.m.f is directly proportional to the rate of change of magnetic flux linkage

Question 7

Define Lenz’s law

Answer 7

An induced e.m.f is in a direction so as to produce effects that oppose the change producing it