Question

A copper wire has resistivity 1.6 ×10^-8ohm meter gas a cross section area of 10×10^-4 cm^2. Calvulate yhe length of the wire required to make 20ohm coil

Answer 1

Hey
Here is Your answer
===================================
Resistance=resistivity*length/area
length=resistance*area/resistivity
length=200*10*10^-4/1.6*10^-8
length=125*10^5m
====================================
HOPE IT WILL HELP YOU
PLEASE MARK IT AS BRAINLIEST