A circuit has an area of 0.4m2 and consists of 50 loops of wire. If the loops are twisted and allowed to rotate at a constant angular velocity of 10 rad s-1 in a uniform magnetic field of 0.4T, the amplitude of the induced voltage is
A. 8V B. 16V C. 20V D. 80V
Correct Answer: D
Explanation
The induced voltage = time rate of change of magnetic flux i/e E = - NΔ∅B
Δt
But ∅B = Magnetic Flux = Magnetic Induction (B) x (A) = 0.4T x 0.4m2 = 0.16 volt secondi/e E = - NΔ∅B
