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Resistivity

If the figure...

Question

If the figure shows a part of an electric circuit, then the current $I$ is

A

1 A

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B

3 A

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C

2 A

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D

4 A

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Solution

The correct option is B $3 A$
Outgoing Current $= 3 + 2 + 5 = 10 A$
Incoming Current $= 6 + 1 + I = (7 + I) A$
By comparing ,we get $\Rightarrow 10 = 7 + I$
$\Rightarrow I = 3$

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