Question

The electrical resistivity of few materials is given below in ohm-meter. Which of these materials can be used for making element of a heating device?

a.6.84 x 10-8 b)1.60 x 10-8 c)1.00 x 10-4

d.2.50 x 1012 e)4.40 x 10-5 f. 2.30 x 1017

Answer 1

Answer:

f)

Explanation:

because Resistivity directly proptional to Resistance

and heat increases with increase in resistance