Sat January 22, 2011 By:

why does a voltmeter have a very huge resistance? does this help to measure potential difference?anyway, how does voltmeter actually measure p.d?

Expert Reply
Sat January 22, 2011
Dear student
A voltmeter measures the change in voltage between two points in an electric circuit and therefore must be connected in parallel with the portion of the circuit on which the measurement is made.
It is necessary for the voltmeter to have a very high resistance so that it does not have an appreciable affect on the current or voltage associated with the measured circuit.
Hope this helps
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