In the network shown, resistance of the voltmeter is 100Ω . Then reading of the voltmeter is
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a
5 V
b
25 V
c
10 V
d
20 V
answer is D.
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Detailed Solution
Equivalent resistance of the circuit Re=10+100 x 50100+50Ω=1303Ω∴Current through 10Ω i=26130/3A=610A∴iv = Current through the voltmeteriv=i x 50100+50A=610 x 13A=210A∴Reading of voltmeter=iv x 100 volt=20 volt