The range of a voltmeter is 10 V and its internal resistance is $50\ \Omega$. To convert it to a voltmeter of range 15 V, how much resistance is to be added?

The range of a voltmeter is 10 V and its internal resistance is 50Ω. To convert it to a voltmeter of range 15

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50\ \Omega

Manipur CohsemCOHSEM Manipur Higher Secondary Board 2023Subjective· 2mImportance★★★★★

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$R = \left(\dfrac{V_2}{V_1}-1\right)G$ .

To extend the range of a voltmeter of resistance $G$ and full-scale range $V_1$ to a new range $V_2$ , a series resistance $R$ must be added, given by $R = \left(\dfrac{V_2}{V_1}-1\right)G$ (since the full-scale current $I_g = V_1/G$ must now correspond to $V_2$ across $G+R$ ):

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Q.The range of a voltmeter is 10 V and its internal resistance is $50\ \Omega$ . To convert it to a voltmeter of range 15 V, how much resistance is to be added?

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Q.The range of a voltmeter is 10 V and its internal resistance is 50 Ω50\ \Omega50 Ω. To convert it to a voltmeter of range 15 V, how much resistance is to be added?

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Q.The range of a voltmeter is 10 V and its internal resistance is $50\ \Omega$ . To convert it to a voltmeter of range 15 V, how much resistance is to be added?

Unlock everything free for 14 days