Physics, asked by arul6, 1 year ago

resistance of a given wire of length is 3ohm the wire is strechted uniformly such that its length becomes 2length find the new resistance of the stretched wire

Answers

Answered by kunal0912
18
New Resistance = 12 ohm

Because Resistance is directly Proportional to length. and Inversely Proportional to cross-section area

yash847: i think answer must be 24 ohm
kunal0912: why bro
yash847: sorry 12 ohm.
kunal0912: why bro
yash847: because if we stretch then A'=A/2 and L'=2L so when we put these values then answer will come 12 ohm
kunal0912: wow bro presence of mind great ans
yash847: R'= rho L'/A' now put the above values in this
yash847: is it correct????
kunal0912: yes bro
yash847: okk hmm now correct it in your answer
Answered by Afzal999
46
if you understand Pls make it the brainliest
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