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Kirchoff's Voltage Law

In the given ...

Question

In the given circuit, find the potential difference $V_{P} - V_{Q}$

A

5V

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B

10V

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C

15V

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D

20V

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Solution

The correct option is D 20V

$i = \frac{Δ V}{R} = \frac{30}{15} = 2 A$
As we move from P to Q
$V_{P} - i (8) - i (2) = V_{Q}$
$V_{P} - V_{Q} = i (8 + 2) = i (10) = 2 (10)$
$= 20$ Volt

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