Two identical coils each having turns and plane area rotate together about the same…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Two identical coils each having

100

turns and plane area

0.010\,\text{m}^2

rotate together about the same axis in a uniform magnetic field of

0.30\,\text{T}

with constant angular speed

50\,\text{rad s}^{-1}

. The coils are connected in series. What is the peak value of the emf across the combination? (a)

21\,\text{V}

(b)

60\,\text{V}

(c)

30\,\text{V}

(d)

15\,\text{V}