JEE Main 2017 · 2 Apr · Shift 1 · Physics Q29

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PhysicsSingle correct+4 / -1Question 29 of 90

Which of the following statements is false ?

Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.

In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.

A rheostat can be used as a potential divider.

Kirchhoff's second law represents energy conservation.

Answer and worked solution

Official answer: B

Statement (2) is false: in a balanced Wheatstone bridge the cell and galvanometer can be interchanged without disturbing the balance (the balance condition $\frac PQ=\frac RS$ is symmetric). The other three statements are true.

Topics:Wheatstone bridge and metre bridge Kirchhoff's laws

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JEE Main 2017 · 2 Apr · Shift 1, Physics question 29