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Question

The internal resistance of two cells shown are 0.1 Ω and 0.3 Ω. If R=0.2Ω, the potential difference
across the cell

1444455_047a9d4bcb354eb5870fe5125e7c1ff9.png

A
B will be zero
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B
A will be zero
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C
A and R will be 2V
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D
A will be>2V and B will be <2V
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Solution

The correct option is A B will be zero
Applying Kirchoff's voltage law across the circuit

Current I=0.5I0.3I+2V0.1+3V0

0.6I=4

I=406=203A

For potential difference across B, moving across it we have,

V10.3×203+2V=V2

V12V+2V=V2

So, potential difference across B is 0

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