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Resistance

Why should th...

Question

Why should the resistance of:

(a) an ammeter be very small?
(b) a voltmeter be very large?

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Solution

(a) An ammeter should have a very low resistance so that it will not change the value of the current flowing in the circuit.
(b) A voltmeter should have a high resistance so that it can take only a negligible amount of current from the circuit.

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