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What is the r...

Question

What is the resistance of an ideal ammeter?

A

Zero

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B

Infinite

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C

Equal to resistance in circuit

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D

Data insufficient

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Solution

The correct option is A Zero
The internal resistance of an ideal ammeter is zero ohms.
In an ammeter maximum current has to flow through it. If the resistance is increased, the flow of current will be decreased as the current and resistance are inversely proportional to each other. That is, $C u r r e n t (I) = \frac{V o l t a g e (V)}{R e s i s t a n c e (R)}$ .

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