Question:
A galvanometer of resistance \( 100\Omega \) gives a full scale deflection for a current of \( 1\,\text{mA} \). The resistance required to convert it into a voltmeter which can read up to \( 2\,\text{V} \) is
A galvanometer of resistance \( 100\Omega \) gives a full scale deflection for a current of \( 1\,\text{mA} \). The resistance required to convert it into a voltmeter which can read up to \( 2\,\text{V} \) is
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Voltmeter → add high resistance in series.
Updated On: Apr 21, 2026
- \(1175\,\Omega \)
- \(1200\,\Omega \)
- \(1525\,\Omega \)
- \(1900\,\Omega \)
- \(2025\,\Omega \)
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The Correct Option is D
Solution and Explanation
Concept:
\[
V = I(R + R_g)
\]
Step 1: Substitute values.
\[ 2 = 0.001(R + 100) \] \[ R + 100 = 2000 \Rightarrow R = 1900\,\Omega \]
Step 1: Substitute values.
\[ 2 = 0.001(R + 100) \] \[ R + 100 = 2000 \Rightarrow R = 1900\,\Omega \]
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