Question

write the formula for resistance in terms of rho , l and A. If the area of cross section of wire is mode i) A/3 ii) 3A​

Answer 1

ur required formula is as follows:-

$\underline{\boxed{\sf R = ρ\dfrac{l}{A}}}$

Answer 2

Answer:

R = pl/a

1. R = 3pl/a

2. R = pl/3a