In a Wheatstone bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, the equivalent resistance of the combination as seen by the battery is:
A
R
B
2 R
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
The balanced condition of Wheatstone's bridge is
As bridge is in balanced condition, no current will flow through 
.
Also, 
and 
are in parallel combination.
Hence, equivalent resistance between 
and 
will be
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