Topic 7 Magnetic Fields Key Terms

Question 1

Magnetic Flux Density (B)

Answer 1

Measure of strength of field, in Tesla (T)

Question 2

Magnetic Flux

Answer 2

Value that describes the magnetic field/ magnetic field lines passing through a given area, in Wb

Question 3

Magnetic Flux Linkage

Answer 3

Magnetic flux multiplied by number of turns N, of a coil

Question 4

Magnetic Field

Answer 4

Region of space where a charged particle experiences a force

Question 5

Faraday’s Law

Answer 5

Magnitude of induced emf is equal to the rate of change of flux linkage

Question 6

Lenz’s Law

Answer 6

The direction of induced current is such as to oppose the motion causing it

Question 7

Peak Value

Answer 7

Maximum value, distance from equilibrium to the highest or lowest point

Question 8

Root mean Square Value (RMS)

Answer 8

The average of all the squares of the possible values. Gives you an effective value of the current or voltage output

Question 9

Time period

Answer 9

Time taken to complete one full cycle

Question 10

Frequency

Answer 10

The number of complete oscillations passing through a point, per second

Question 11

Flemming’s Left Hand Rule

Answer 11

Describes motion of a current carrying conductor in a magnetic field

Question 12

Flemming’s Right Hand Rule

Answer 12

Describes an induced current due to a moving conductor in a magnetic field