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CBSE Class 12-science Answered

(i) Why the Wheatstone bridge method is more accurate than the other methods of measuring the resistances? (ii) When the balance point is obtained in the potentiometer the current is drawn from which battery?
Asked by Topperlearning User | 28 Apr, 2015, 10:22: AM
answered-by-expert Expert Answer
(i) The Wheatstone bridge method is more accurate than the other methods of measuring resistances because it uses null method.       Hence the internal resistance of the cell and resistance of galvanometer do not affect the null point.
 
(ii) When the balance point is obtained in the potentiometer the current is drawn from auxiliary battery.
Answered by | 28 Apr, 2015, 12:22: PM

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