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Combination of Resistances

In the circui...

Question

In the circuit shown, the point $^{'} B^{'}$ is earthed. The potential at the point $^{'} A^{'}$ is

14 V

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24 V

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26 V

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50 V

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Solution

The correct option is B $24 V$
$i = \frac{50}{5 + 7 + 10 + 3} = 2 A$
Potential difference between $A$ and $B$
$V_{A} - V_{B} = 2 \times 12$
$⟹ V_{A} - 0 = 24$
$∴ V_{A} = 24$

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