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Home / Doubts and Solutions/JEE/Physics

Find the value of R

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Asked by venkat 28th February 2018, 11:45 PM
Answered by Expert
Answer:
Galvanometer does not show any deflection. Hence no current is flowing from 2V battery. This is possible only if potential difference beteen points A and B are 2V. Hence potential difference across 500Ω resistor is 10 V.
Hence current flowing through 500Ω resistor is 10/500 = 20mA.
Same 20 mA will flow through resistance R. Hence resistance value of R = 2/0.02 = 100Ω.
Answered by Expert 1st March 2018, 12:22 PM
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