Question

In an ac dynamo, the peak value of emf is 60 volts, then the induced emf in the position, when armature makes an angle of 30^o with the magnetic field perpendicular with the coil, will be

• A. 20 volts
• B. $30\sqrt{3}$volts
• C. 30 volts
• D. 45 volts

Answer 1

Answer: (C)

30 volts

Answer 2

$e = e_{0}\sin\omega t$ = e₀ sin θ = 60 sin30^o = 30 volts