Answers

  • Brainly User
2014-05-19T10:53:01+05:30
The voltage across the 24 ohms resistor is 30 - 18 = 12 v 

The current flowing is 12 v / 24Ω = 0.5 A 

The current through the 50 Ω resistor is 18v / 50Ω = 0.36 A 

So the current through the voltmeter is 0.5A - 0.36 A = 0.14 A 

The resistance of the voltmeter is 18 v / 0.14 A = 128.6 Ω
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2014-05-19T12:30:44+05:30
R =v/i
r = 18/50 ohm
.;. R = 0.36 ohm
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