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Question

You are given four ammeters A, B, C and D having the least counts mentioned below:
(a) Ammeter A with least count 0.25 A
(b) Ammeter B with least count 0.5 A
(c) Ammeter C with least count 0.05 A
(d) Ammeter D with least count 0.1 A

Which of the ammeters would you prefer for doing an experiment to determine the equivalent resistance of two resistance most accurately, when connected in parallel?
(1) A
(2) B
(3) C
(4) D

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Solution

An ammeter with the minimum least count should be used while determining the equivalent resistance of two resistors, so that there should be minimum errors in the experiment.

Hence, the correct answer is option 3.

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