Loading effect
difference between actual voltage that exists in the circuit without connecting the voltmeter and the voltage that appears after connecting it
en-GB/ˈləʊdɪŋ ɪˈfɛkt/
en-US/ˈloʊdɪŋ ˈifɛkt/
difference between actual voltage that exists in the circuit without connecting the voltmeter and the voltage that appears after connecting it