Match List-I with List-II

Choose the correct answer from the options given below:

(A) - (III), (B) - (IV), (C) - (I), (D) - (II)

The correct answer is Option (4) → (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Electrical conductivity (o) is a fundamental property of a material that quantifies its ability to allow the flow of an electric current. It is the reciprocal of electrical resistivity.SI Unit: Siemens per metre (S/m).Materials are classified based on their conductivity levels:

Conductors: Have high conductivity due to a high density of free charge carriers (e.g., metals).

Semiconductors: Have intermediate conductivity that can be manipulated by temperature or impurities (e.g., silicon, germanium).

Insulators: Have very low conductivity as their electrons are tightly bound (e.g., rubber, glass, pure water).

Conductivity varies widely depending on whether the material is a conductor, semiconductor or insulator.

Conductivity of Materials

Detailed Explanation: Gold

Gold is an excellent conductor.

Hence it has very high conductivity.

In the provided matching context:

Matches with: $4.5 \times 10^3$

$(A) \rightarrow (III)$.

Germanium

Germanium is a semiconductor.

Its conductivity is moderate.

Matches with: $2.0$

$(B) \rightarrow (IV)$

Glass

Glass is an insulator.

Its conductivity is extremely low.

Matches with: $1.0 \times 10^{-16}$

$(C) \rightarrow (I)$

Graphite

Graphite conducts due to delocalized electrons.

But less than metals.

Matches with: $1.2 \times 10$

$(D) \rightarrow (II)$