Physics · Voltmeter Loading Effect
What causes the 'loading effect' when a voltmeter is connected across a circuit load resistor to measure voltage?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The voltmeter draws excessive power without changing branch current
- 2The internal resistance of the voltmeter connects in series with the load
- 3The voltmeter introduces additional external voltage across the load
- 4The finite internal resistance of the voltmeter connects in parallel with the load resistor, reducing total circuit resistance✓
Correct answer
The finite internal resistance of the voltmeter connects in parallel with the load resistor, reducing total circuit resistance
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