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A Wheatstone bridge consisting of four a...

A Wheatstone bridge consisting of four arms of resistances P,Q,R,S is most sensitive when

A

all the resistances are equal

B

all the resistances are unequal

C

the resistances P and Q are equal but` R gt gt P` and `S gt gtQ`

D

the resistances P and Q are equal but `R lt lt P` and `S ltlt Q`

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The correct Answer is:
A
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