Resistance????????

Asked by akhil_93 | 13th Sep, 2008, 06:44: PM

Expert Answer:

A voltmeter needs to measure voltage between two points and is connected in parallel across the two points.If the voltmeter has a finite resistance then it will draw some current from the circuit and potential difference between points two measured will be different from required value.Similarily an ammeter has negiligible resistance as it is connected in series and if it has a finite resistance current drawn from circuit will be reduced and the value obtained will again have errror.

Answered by  | 13th Sep, 2008, 08:13: PM

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