Please solve the 8 th problem.
Please do not provide any link.
Q.8. Two wires of the same material and same length have radii 1 mm and 2 mm respectively. Compare :
(i) their resistances, (ii) their specific resistance.
Ans. (i) 4 : 1 (ii) 1 : 1

Dear Student ,

We know,

Resistance, R = ρL/A

A = πr2


R = ρL/(πr2)

In the question the radii of the wires are different . But they are made up of same material and same length.

R1R2=r22r12=41R1:R2 = 4:1As the materials have same material so they will have equal specific resistance .ρ1:ρ2=1:1

  • 0
What are you looking for?