Find the value of r if I-1A and potential difference across PQ is 1V

5 Ω

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$10 Ω$

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$20 Ω$

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$25 Ω$

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Solution

The correct option is D
$25 Ω$

Between P and Q, $R = \frac{3 \times 2}{3 + 2} = \frac{6}{5}$
Current between P & Q $= \frac{5}{6} a m p .$
Current in 1 $Ω$ resistor $= 1 + \frac{5}{6} = \frac{11}{6} a m p .$

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Find the value of r if I-1A and potential difference across PQ is 1V

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