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Q.

In the given circuit diagram the current through the $1 Ω$ resistor is $I .$ Find the value of $2 I$ (in A).

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answer is 5.

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Detailed Solution

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$\frac{V - 20}{2} + \frac{V}{2} + V - 5 = 0 \Rightarrow V - 20 + V + 2 (V - 5) = 0$

$\Rightarrow 4 V - 20 - 10 = 0 \Rightarrow V = \frac{30}{4} = \frac{15}{2} V, I = \frac{15 - 10}{2} = \frac{5}{2} A \Rightarrow 2 I = 5 A$

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