Q: A person peddles a stationary bicycle the pedals of the bicycle are attached to a 100 turn coil of area 0.10 m2. The coil rotates at half a revolution per second and it is placed in a uniform magnetic field of 0.01 T perpendicular to the axis of rotation of the coil, What is the maximum voltage generated in the coil?
Sol: Here f = 0.5 Hz ; N = 100, A = 0.1 m2 and B = 0.01 T ;
From the equation ; e = e0 sin ωt = N B A ω sinωt
maximum emf e0 = N B A ω = N B A(2πf)
e0 = 100 × 0.01 × 0.1 × 2 × 3.14 × 0.5 = 0.314 V.