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In the given circuit, what is the value of R in ohm for which current flowing through 4 ohm resistor is zero.

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In the given circuit, what is the value of R in ohm for which current flowing through 4 ohm resistor is zero.

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In closed loop ABDEA 

-2I-4 x  0-6+10 = 0

-2I + 4 = 0

I = 2A

In closed loop BDFC

4 + IR - 6 = 0

IR = 2

R = 1Ω

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