Question

Air
Material
Resistivity (2 )
Copper
1.68' 10-
Germanium
4.60 x 10-
Glass
10.0 x 1010
1.3 x 1016
From the above table,
a) Which one does pass the electricity ?
b) Which one does not pass the electricity ?
Which substance can be used to make insulator
d) Which material has high conducitivity ?
TIR​

Answer 1

Answer:

a)copper

b)glass

c)copper

Answer 2

Correct Data :-

Resistivity of copper = 1.68 × 10⁻⁸ Ωm

Resistivity of Germanium = 4.60 × 10⁻³ Ωm

Resistivity of Glass = 10.0 × 10¹⁰ Ωm

Resistivity of Air = 1.3 × 10¹⁶ Ωm

Correct Answer:

(a) The material which has lowest resistivity will conduct electricity, so copper will pass the electricity.

(b) The material which has highest resistivity will not conduct electricity, so air will not pass the electricity.

(c) Glass can be used to make insulator as it has high resistivity.

(d) Copper has highest conductivity as conductivity is inversely proportional to resistivity.