Q.

For what value of R in circuit, current through 4   Ω resistance is zero?

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a

4   Ω

b

1   Ω

c

3   Ω

d

5   Ω

answer is B.

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Detailed Solution

As current through 4   Ω is zero, there should be no potential drop across it.Value of R for this condition =  1   Ω
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For what value of R in circuit, current through 4   Ω resistance is zero?