1.

Statement I: In the potentiometer circuit shown in figure. E_1 and E_2 are the emf of cells C_1 and C_2, repsectively, with E_1gtE_2. Cell C_1 has negligible internal resistance. For a given resistor R, the balance length is x. If the diameter of the potentiometer wire AB is increased, the balance length x will decrease. Statement II: At the balance point, the potential difference between AD due to cell C_1 is E_2 , the emf of cell C_2.

Answer»

Statement I is true, Statement II is True, Statement II is a correct EXPLANATION for Statement I.
Statement I is True, Statement II is True, Statement II is not a correct explanation for Statement I.
Statement I is True, Statement II is False.
Statement I is False, Statement II is True.

Solution :d. If the diameter of wire AB is INCREASED, its resistance will
decrease. Hence, the potential DIFFERENCE between A and B
due to CELL `C_1` will decrease. Therefore, the null point will be
obtained at a higher VALUE of x.


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