Question

1) A 240-loop circular armature coil with a diameter of 11.2 cm rotates at 100 rev/s in a uniform magnetic field of strength 0.40 T . What is the rms voltage output of the generator?

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2) Suppose 51 kW is to be transmitted over two 0.110 Ωlines

Estimate how much power is saved if the voltage is stepped up from 190 V to 1900 V and then down again, rather than simply transmitting at 190 V . Assume the transformers are each 99% efficient.

Answer 1

dl t 419778 V