Electromagnetic Field Theory
A circular loop has its radius increasing at a rate of 2 m/s. The loop placed perpendicular to a constant magnetic field of 0.5 wb/m2. When the radius of the loop is 4 m. the emf induced in the will be

 0.4 π V.
 Zero.
 8 π V.
 0.8 π V.

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Electromagnetic Field Theory
According to maximum power transfer theorem, the maximum power is absorbed by one network from another network when

The impedance of one of the networks is half that of the other
The impedance of one is equal to that of the other
None of these
The impedance of one is the complex conjugate of the other

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