A Galvanometer of resistance 60 Ohm gives full deflection with a current of 4 mA .A resistance of
10940 Ohm is connected in series with a coil to convert it into voltmeter.
find the range of voltmeter obtained.TAns: 44 Volt
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If the galvanometer is converted to read 15 volts, resistance in series with galvanometer coil is connected. The voltage drop across the resistance should be equal to
15–0.25=14.75 volt, when the current through the series circuit is 5mA.
The value of series resistance
=14.75/0.005
=2950 Ohms
=2.95 Kilo Ohms
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