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JEE MAIN 2019
08-04-2019 S2
Question
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 $r=0.01 \Omega / \mathrm{cm}$. 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:
Question Image
Select the correct option:
A
0.75 V
B
0.50 V
C
0.20 V
D
0.25 V
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
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