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 . if an ideal voltmeter is connected as shown with jockey J at 50 cm from end A, the expected reading of the voltlmeter will be:
0.50 V
0.75 V
0.25 V
0.20 V
Option 1)
0.50 V
Option 2)
0.75 V
Option 3)
0.25 V
Option 4)
0.20 V
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