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Kirchhoff's Voltage Law

A PMMC voltme...

Question

A PMMC voltmeter is connected across a series combination of a DC voltage source $V_{1} = 2 V$ and AC voltage source $V_{2} (t) = 3 s i n (4 t) V$ . The meter reads

A

2 V

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B

5 V

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C

(2 + \sqrt{3} / 2) V

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D

\sqrt{17} / 2) V

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Solution

The correct option is A 2 V
Total voltage across PMMC
$= V_{T} = V_{1} + V_{2}$
$= 2 + 3 s i n (4 t) V$
PMMC reads average value
Average value of $V_{1} = 2 V$
Average value of $V_{2} = 0$
Average value of $V_{T} = 2 V$
So PMMC reads $= 2 V$

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