Question

A wire of length 3 m and area of cross-section 1.7X10-6 m2 has a resistance 3X10-2ohm.

Answer 1

what is ur question..... what we hav to find???? resistivity???
given:l=3m,A=1.7X10-6 m2,R=3X10-2ohm.
resistivity(ro)=?
solution :
resistivity(ro)=RXA / L
=3X10-2 X 1.7X10-6 / 3
=1.7X10-8ohm m.

thnx Fr seeeinggg my answer