Conversion of Galvanometer to Voltmeter

Chapter-4|Moving Charges and Magnetism| NCERT 12th Physics:

Conversion of Galvanometer to Voltmeter:

Voltmeter: A device used to measure potential difference in a appliance.

Voltmeter is always connected in parallel with appliance.

 

Important Concept: The resistance of an ideal voltmeter should be infinity.


Example: A voltmeter whose coil has resistance 10 ohm, gives full scale deflection for 1 mA. How can you convert it into a voltmeter of range 0-2.5 V.

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