Faraday's Law for Voltage Induction due to a conducting loop in a magnetic field:
\(\DeltaV_{ind}=-d\Phi_{B}/dt = -d(BAcos\theta)/dt\), We can induce a voltage 3 ways. One way is to change the magnetic field (dB/dt). A second way is to change the area of the conducting loop (dA/dt).
a) What is the third way?
b) Is the third way practical in any sense?
c) Why or Why not?