Question

what will be the reading of ammeter if length of the conductor is halved of its initial value

Answer 1

Answer:

When the length of the wire is doubled, then the ammeter reading decreases to half its previous value i.e., current through the wire is halved. Since, resistance of the wire , then R is doubled which implies R x L.

Answer 2

Answer: a=v/r

R=pl/a

So A=2times of intial

Explanation:

R is directly proportional to lenth and inversly Perprtional to current

So when lenth is half than r also became hal f and current double