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In the circuit shown in the figure, reading of voltmeter is V1  when only S1 is closed, reading of voltmeter is V2 when only S2  is closed and reading of voltmeter is V3 when both S1 andS2 are closed. Then, 
 

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a
V3>V2>V1
b
V2>V1>V3
c
V3>V1>V2
d
V1>V2>V3

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detailed solution

Correct option is B

In series P.D is directly proportional to ‘R’ When S1  is closed  V1=3v4                 1:3When S2  is closed  V2=6v7              1:6When both are closed  V3=2v3             1:2V2>V1>V3

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