First slide

Alternating current and voltage

Question

The r.m.s. voltage of the wave form shown is

Moderate

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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