If in the experiment of Wheatstone's bridge, the positions of cells and galvanometer are interchanged, then balance point will

Options

A. change
B. remain unchanged
C. depend on the internal resistance of the cell and resistance of the galvanometer
D. none of these

Answer

B

Explanation

when whetstone bridge is balanced,
`(P)/(Q) = (P)/(S)` or `(P)/(R ) = (Q)/(S)`
If the galvanometer is replaced with a cell in balanced wheatsone bridge, the condition for balanced bridge will be `P//R = Q//S`, which is there. Hence, balanced point will remain unchanged, where galvanometer shows no current.