Which of the following statements is false? (a) Kirchhoff’s second law represents energy conservation. (b) Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude. (c) In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed. (d) A rheostat can be used as a potential divider.

Answer: (c). (a) Kirchhoff's loop law comes from energy conservation. True. (b) The bridge is most sensitive when all four resistances are of the same order. True. (c) Interchanging cell and galvanometer keeps the bridge balanced ( P/Q = R/S is unchanged). False. (d) A rheostat can be used as a potential divider. True. So the false statement is (c).

Which of the following statements is false? | JEE Main 2017

Q75JEE Main 2017Easy

Wheatstone Bridge & Metre Bridge

Which of the following statements is false?

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Answer: (c)

(a) Kirchhoff's loop law comes from energy conservation. True.
(b) The bridge is most sensitive when all four resistances are of the same order. True.
(c) Interchanging cell and galvanometer keeps the bridge balanced ( $\frac{P}{Q} = \frac{R}{S}$ is unchanged). False.
(d) A rheostat can be used as a potential divider. True.
So the false statement is (c).

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