Figure shows the part of a circuit. Calculate the power dissipated in $3 Ω$ resistance.

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27W

48W

12W

answer is C.

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Detailed Solution

Applying Kirchhoff's junction law at $E$ current in wire $D E$ is 8 A from $D$ to $E$ . Now, further applying junction law at $D$ , the current in $3 Ω$ resistance will be 3 A towards $D$ .

Power dissipated in $3 Ω$ resistance $= i^{2} R = (3)^{2} (3) = 27 W$

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