Current Electricity 4 Question 2
2. In the circuit shown, a four-wire potentiometer is made of a
(a)
(b)
(c)
(d)
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Solution:
- In given potentiometer, resistance per unit length is
Length of potentiometer wire is
Net resistance of the wire
Net internal resistance of the cells connected in series,
Reading of voltmeter when the jockey is at
