Physics

Problem

Two identical coils, each having 400 turns and area

150\,\text{cm}^2

, are mounted on the same shaft with their planes perpendicular to each other. The assembly rotates at

1800\,\text{rpm}

in a uniform magnetic field of

0.25\,\text{T}

. If the coils are connected in series, what is the maximum (peak) emf that can appear across the combination? a)

565\,\text{V}

283\,\text{V}

400\,\text{V}

200\,\text{V}