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nishanth R
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Homework Statement
A simple pendulum with bob of mass m and conducting wire of length L swings under gravity through an angle 2 theta. The Earth's magnetic field component in the direction perpendicular to swing is B. The maximum potential difference induced across the pendulum is
Homework Equations
MAGNETIC FLUX=BAcos theta
The Attempt at a Solution
Area traversed by pendulum in 2 theta=theta * L^2
Magnetic flux=BA=B*Theta*L^2
EMF=d(B*Theta*L^2)/dt
=BL^2*d(theta)/dt
=BL^omega
=BL^2*(g/L)^1/2
But the answer is BL*sin (theta/2)*(gl)^1/2