Question

bhai question number 3 batana​

Answer 1

Here is your answer

Mate!!!

(i)Given,

  diameter of copper wire = 0.5mm = 5 × 10-⁴ m

  resistivity = 1.6 × 10^-8 ohm.m

  resistance = 10 ohm  

  Length = ?

 we know,

 R = dL/A

 where R , d , L and A are resistance , resistivity , length and cross section             area.

 10 = 1.6 × 10^-8 × L/(πr²)

 L = 10 × 3.14 × (2.5 × 10^-4)² × 10^8/1.6

 L = 10× 3.14 × 6.25/1.6

 L = 122.656 m

(ii)Mate one thing i wanna tell you 2nd part is in the attachment

Answer 2

Answer :

MARK AS BRAINLIEST