Question

a wire is stretched to increase its length by 10%. find %age increase in resistance

Answer 1

Answer:

what is these I can't understand only

Explanation:

tell me in detail okay again send these question in detail okay

Answer 2

Answer:

21%

Explanation:

R=p*l/A

New length=10/100

= 1.1l

New area=a/1.1

New r' = pl' /A'

=p1.21l/A

=1.21r

therefore % change =r'-r/100

=21%

Just for your reference

p= ressitivity

r'=new radius

A'=new area