Q 12-03-287JEE MainJEE Main 2017 (2 Apr)Easy
Which of the following statements is false?
Answer: (C) In a balanced Wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed
- Kirchhoff's loop law says the sum of emfs equals the sum of $IR$ drops round a loop: it is energy conservation. True.
- A Wheatstone bridge is most sensitive when the four arms are of comparable resistance. True.
- The balance condition $P/Q = R/S$ is unchanged when the cell and galvanometer are interchanged (it reads equally well as $P/R = Q/S$), so the null point is **not** disturbed. This statement is false.
- A rheostat with its three terminals used can act as a potential divider. True.
Solution by Sreeraj P, M.Sc Physics