First slide

KVL

Question

The reading of the ideal voltmeter in the adjoining diagram will be

Moderate

A

4 V
B

8 V
C

12 V
D

14 V

Solution

Current flowing in the circuit $i = \frac{E}{R} = \frac{10 - 4}{20 + 10} = \frac{1}{5} A$
Potential difference across $AC = \frac{1}{5} \times 20 = 4 V$
Potential difference across AN = 4 + 4 = 8 V

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