Magnetic fields and electromagnetism & Electromagnetic induction

Question 1

Definition

Magnetic flux density

Answer 1

Force acting per unit current per unit length on the wire that placed at right angle to the magnetic field

Question 2

Formula

Force exerted by magnetic field equals

Answer 2

Magnetic flux denstity * Intensity * Length * sin(x)

Question 3

Definition

Magnetic field

Answer 3

Field of force produced by moving charge or permanent magnet

Question 4

Definition

Magnetic flux

Answer 4

Product of magnetic flux density right-angle to the circuit and area

Question 5

Formula

Magnetic flux equals

Answer 5

Magnetic flux density * area * cos(x)

Question 6

Definition

Magnetic flux linkage

Answer 6

Product of magnetic flux for a circuit and the number of turns

Question 7

Formula

Magnetic flux linkage equals

Answer 7

Number of turns * Area * Magnetic flux density

Question 8

Definition

Faraday’s law

Answer 8

Magnitude of induced emf is proportional to rate of change of magnetic flux linkage

Question 9

Formula

Induced emf equals

Answer 9

Change in magnetic flux linkage / change in time

Question 10

Definition

Lenz’s law

Answer 10

Induced emf is in a direction to produce oppose effect to the change producing it