# Revision problems

### Explanation of question 7

A circuit takes a current of 14.14A r.m.s. and 20A peak. The current waveform will be

1. triangular
2. sinusoidal
3. rectangular
4. positive pulses

The answer is :- 2

For a sinusoidal waveform the rms current value will be 0.707 x peak value, as in this case, therefore the waveform must be sinusoidal.

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