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In a Wheatstone's 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
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a
R2
b
R
c
2 R
d
R4
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Correct option is B
Since Wheatstone's bridge is balanced, then resistance of galvanometer will be unaffective.Similar Questions
Seven resistances are connected as shown in the figure. The equivalent resistance between A and B is
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