As shown in the figure the voltmeter reads 2 V across 5
resistor. The resistance of the voltmeter is_____ 

Text Solution
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Let the resistance of the voltmeter be R
. The voltmeter is in parallel with the 5
. So the total resistance in the circuit is

Applying Ohm's law in the whole circuit, V = IR,

It is given that the potential difference across 5
is 2 V.
Thus, by Ohm's law,




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