CBSE Class 12-science Answered
A 10 m long wire of uniform cross-section and 20 Ω resistance is used in a potentiometer. The wire is connected in series with a battery of 5 V along with an external resistance of 480 Ω. If an unknown emf E is balanced at 6.o m length of the wire, calculate: 3
(i) the potential gradient of the potentiometer wire
(ii) the value of unknown emf E
Asked by Topperlearning User | 28 Apr, 2015, 12:41: PM
Expert Answer
Current through the potentiometer wire AB,
Potential drop across wire AB,
Length of wire AB, l =10m
(i) Potential gradient is
(ii) Unknown emf,
Answered by | 28 Apr, 2015, 02:41: PM
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