Question

A generator with a square armature of 100 mm and 50 turns of coil generate and induced EMF of x in 2 seconds determine the magnitude of x if the strength of field is 0.1 Tesla

Answer 1

Explanation:

Number of turns N=10000 turns

Area of coil A=100 cm

2

=0.01 m

2

Frequency f=140 rpm=

60

140

rps

Angular speed w=2πf=2×

7

22

×

60

140

=14.7 rad/s

Magnetic field B=3.6×10

−2

T

Maximum value of emf induced E

max

=NBAw

⟹ E

max

=10000×3.6×10

−2

×0.01×14.7=52.9 volts