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Ohm's Law

The current i...

Question

The current $i_{4}$ in the circuit of figure is equal to

12 A

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-12 A

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4 A

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None of these

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Solution

The correct option is B -12 A

Apply KCL at node A
$i_{0} + i_{1} + i_{4} = 0$
$7 + 5 + i_{4} = 0$
$i_{4} = - 12 A$

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