Question

ii) If the magnetic flux passing through a coil of 100 turns of
wire increases by 15 weber in 2 second. Find the e.m.f.
induced in the coil. An electric bulb is marked as 240 V-60
W. What does it mean?​

Answer 1

Decrease in the flux = 0.005 - 0 = 0.005

Weber,

no of turns = 100 turns

time = 5 s

e.m.f induced = n × rate of increase of magnetic flux

= 100 ×× 0.005 / 5

•

• • e.m.f induced e = 0.1 v = 100 mv..