47.
In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters?

49.
The time constant of the capacitance circuit is defined as the time during which voltage

50.
The square waveform of current has following relation between r.m.s. value and average value.

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