Rankers Physics

Measuring Devices ( Galvanometer, Voltmeter and Ammeter & Meter Bridge ): Practice Problem & Solution

To convert a galvanometer into a voltmeter one should connect a: (2002)
High resistance in series with galvanometer
Low resistance in series with galvanometer
High resistance in parallel with galvanometer
Low resistance in parallel with galvanometer

Solution Explained:

To solve this problem, we apply the core principles of Measuring Devices ( Galvanometer, Voltmeter and Ammeter & Meter Bridge ). Understanding the underlying formula is key to arriving at the correct answer below:

A voltmeter is formed by connecting a very high resistance in series with a galvanometer to measure large potential differences.

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1. A galvanometer has a coil of resistance \( 100\ \Omega \) and gives full scale deflection for 20 mA current. If it is to work as a voltmeter of 10 volt range, the resistance required to be added will be:
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