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In the circuit shown here, cells A and B have emf 10 V each and the internal resistance is 5Ω for A and 3Ω for B. For what value of R will the potential difference across the cell A will be zero?

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a

zero

b

1 ohm

c

2 ohm

d

3 ohm

answer is C.

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Detailed Solution

i=e1−e2R+r1+r2,v=e1−ir1=07

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In the circuit shown here, cells A and B have emf 10 V each and the internal resistance is 5Ω for A and 3Ω for B. For what value of R will the potential difference across the cell A will be zero?