Question

why the ammeter reading decreases to one half when length of wire is doubled??? plz answer fast...​

Answer 1

Explanation:

the Resistance of the wire is directly proportional to the length of the wire so, if the length is doubled, resistance becomes double.

Also resistance is inversely proportional to the current hence the current decreases

R=V/I

Answer 2

Answer:

Explanation:Actually when length of the wire is doubbled then it's resistances also issue double because of the formula

R= p ×l/A

But ammeter reads 1/2 because

it have a resistance connected in parallel and this decreases reading of current

But there is a justified scale for understanding That if it is reading xA then it should be YA

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