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Ammeter

Why should an...

Question

Why should an ammeter have a low resistance ?

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Solution

An ammeter is an instrument for measuring the electric current in amperes in a branch of an electric current. It must be placed in series with the measured branch, & must have very low resistance to avoid significant alternation of the current it is to measure.

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The resistance of an ammeter should always be low.

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Q. Identify the correct options.
(a) An ammeter should have small resistance.
(b) An ammeter should have large resistance.
(c) A voltmeter should have small resistance.
(d) A voltmeter should have large resistance.

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Q. Question 21
Should the resistance of an ammeter be low or high? Give reason.

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