Physics-
General
Easy
Question
Circuit for the measurement of resistance by potentiometer is shown. The galvanometer is first connected at point-A and zero-deflection is observed at length PJ=10 cm. In the second case, it is connected at a point 
and zero deflection is observed at a length 
from P. Then what is the unknown resistance X?
- 2R
- 3R
The correct answer is: 2R
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