A 40 cm rod is rotated about its centre inside a region of uniform magnetic field of 6.4 T. Given that the speed of rotation is 15 rad/s, find potential difference between the centre and either end of the rod
emf = - ΔΦ / Δt
ω = 2π / T
The Attempt at a Solution
emf = - B cos θ . ΔA / Δt = - B . πr2 / T
I just need to plug the numbers with r = 20 cm (because from center to either end of rod)?