When bridge is balanced, what is the current flowing through the galva

1.	When bridge is balanced, what is the current flowing through the galvanometer?
A.	0
B.	depends on the ratio arms R<sub>1</sub> and R<sub>2</sub>
C.	varies by a factor of 2
D.	depends on the type of null detector used
Answer» B. depends on the ratio arms R<sub>1</sub> and R<sub>2</sub>

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