Questions
In the given circuit, the ratio of voltmeter reading to the ammeter reading is . If resistance of ammeter is RA and that of voltmeter RV then
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a
R=R'+RA
b
R=R'−RA
c
RV=R+RA
d
RV=R−RA
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Correct option is B
Let current through R be I0 and voltmeter reading isV0, then R'=V0/I0, also V0=I0 R+RAV0I0 = R+RAR'=R+RA ⇒ R=RA−R'Similar Questions
In the given circuit, the voltmeter records 5 volt. The resistance of the voltmeter in ohms is
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