A wire of resistance R is stretched to twice of its original length. Determine
its new resistance.
Answers
Answered by
3
Answer:
Correct option is
A
4 R
R=ρl/A
New length l
′
=2l
New areas of cross section A
′
=A/2
R
′
=ρ
A/2
l
′
R
′
=4R
Explanation:
PLEASE MARK IT AS A BRAINLIST I MADE A HARDWORK ON WRITING YOUR ANSWER
Answered by
1
Answer:
As the length of wire gets doubled, the cross-sectional area will become half of its previous value because volume of wire remains constant. Hence, we can see that the new resistance is four times the previous resistance.
Similar questions