X is unknown resistance as shown in the potentiometer circuit. The length of wire AB is 100 cm. When P and Y are connected then balance is obtained at 40 cm and when P and Z are connected then balance is obtained at 58.8 cm. The value of Xis
Asked by dipanshusingla029
28th April 2018,
12:46 PM
Answered by Expert
Answer:
Let i be the current passing through the 100Ω resistance and unknown resistance X.
then for balance to occur when P and Y are connected : 100×i = (50/100)v0 .....................(1)
for balance to occur when P and Y are connected : (100+X)×i = (58.8/100)v0 ...................(2)
dividing (2) by (1) :
solving for x, we get x = 17.6 Ω
Answered by Expert
28th April 2018,
1:30 PM
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