Question

12. The electrical resistivities of five substances A, B, C, D and E are given below:

A) 5.20 x 10-8 Ωm

B) 110 x 10-8 Ωm

C) 2.60 x 10-8 Ωm

D) 10.0 x 10-8 Ωm

E) 1.70 x 10-8 Ωm

(a) Which substance is the best conductor of electricity ? Why ?

(b) Which one is a better conductor : A or C ? Why?

(c) Which substance would you advise to be used for making heating elements of electric irons ? Why ?

(d) Which two substances should be used for making electric wires ? Why ?​

Answer 1

Explanation:

E because it has low restitivity