Question

The resistivities of some substances are given below:

Materials

Resistivity (Qm)

A

1.6X10-8

B

6.4X10-8

C

10x10-8

D

96X10-8

E

100X10-6

Answer the following questions in relation to them giving justification of each:

(a) Which material is best for making connecting cords? (b) Which material do you suggest to be used in heating devices?

(c) You have two wires of same length and same thickness. One is made of material A and another of material D. If the resistance of wire made of A is 2 12, what is the resistance of the other

wire?
please answer correctly​

Answer 1

Answer:

(a). copper

(b). nichrome

Explanation:

because copper is best for connecting wire.and a good conductor of electricity..

because nichrome has very high resistance and highly resistance material is best for heating device...