Current Electricity - Result Question 110
115. In a metre-bridge, the balancing length from the left end when standard resistance of is in right gap is found to be . The value of unknown resistance is
[1999]
(a)
(b)
(c)
(d)
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Answer:
Correct Answer: 115. (a)
Solution:
- (a) Let unknown resistance be
. Then condition of Wheatstone’s bridge gives , where is resistance of wire per .