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A resistor R is connected to a voltage source Vs having an internal resistance Rs . A voltmeter of resistance Rm is connected across the terminals of the resistor R. The voltmeter will read a voltage of
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Vs Rs Rm Rs Rm + Rs R + R Rm -
Vs R R + Rs -
Vs Rm R Rs + Rm -
Vs R Rm Rs R + Rs Rm + R Rm
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Correct Option: D
The figure will be as drawn below :
Voltage measured across R = IR. R
| = R × I × | ||
| R + Rm |
| = | × | ||||
| R + Rm | Rs + | ||||
| Rm + R | |||||
| = | ||
| RsR + RsRm + RRm |
