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JEE Main Physics Class 12 Current Electricity Part 1 Questions

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Question : 9

Total: 100

In the circuit shown, a four-wire potentiometer is made of a 400 cm long wire, which extends between A and B. The resistance per unit length of the potentiometer wire is r = 0.01 Ω/cm. If an ideal voltmeter is connected as shown with jockey J at 50 cm from end A, the expected reading of the voltmeter will be :

[8 Apr. 2019 II]

0.50 V
0.75 V
0.25 V
0.20 V

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