Question

A cylindrical conductor of length “l? and uniform area of cross-section ‘A’
has resistance 'R'. Another conductor of length 2.5 l and resistance 0-5 R
of the same material has area of cross-section
​

Answer 1

Step-by-step explanation:

0.5R = rho 0.5l/A

0.5R = rho 2.5/a

0.5l/A = 2.5/a

a = 2.5A/0.5l

a = 5A/l