Three resistances 
each of 
and an unknown resistance S form the four arms of a Wheatstone's bridge circuit. When a resistance of 
is connected in parallel to S, the bridge gets balanced. What is the value of S?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
In order to balance the bridge, the effective value of S must be equal to 
.
So, 
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