First slide

Alternating current and voltage

Question

The r.m.s. voltage of the waveform shown is

Easy

A

10 V
B

7 V
C

6.37 V
D

None of these

Solution

$V_{rms} = \sqrt{\frac{1}{T} \int_{0}^{T} 10^{2} dt} = 10 V$

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