The electrical resistivities of four materials $A, B, C$ and $D$ are given below:
$\text{A}\ -110\times10^{-8}\Omega\text{ m}$
$\text{B}-\ 1.0\times10^{10}\Omega\text{ m}$
$\text{C}-\ 10.0\times10^{-8}\Omega\text{ m}$
$\text{D}-\ 2.3\times10^{3}\Omega\text{ m}$
Which material is:

Good conductor.

Resistor.

Insulator, and

Semiconductor

Q: The electrical resistivities of four materials $A, B, C$ and $D$ are given below: $\text{A}\ -110\times10^{-8}\Omega\text{ m}$ $\text{B}-\ 1.0\times10^{10}\Omega\text{ m}$ $\text{C}-\ 10.0\times10^{-8}\Omega\text{ m}$ $\text{D}-\ 2.3\times10^{3}\Omega\text{ m}$ Which material is: 1. Good conductor. 2. Resistor. 3. Insulator, and 4. Semiconductor

1. Good conductor $= C (10 \times 10^{-8} $ ohm$).$ 2. Resistor $= A (110 \times 10^{-8} $ ohm$).$ 3. Insulator $= B (1 \times 10^{10} $ ohm$).$ 4. Semiconductor $= D (2.3 \times 10^3 $ ohm$).$

Question

The electrical resistivities of four materials $A, B, C$ and $D$ are given below:
$\text{A}\ -110\times10^{-8}\Omega\text{ m}$
$\text{B}-\ 1.0\times10^{10}\Omega\text{ m}$
$\text{C}-\ 10.0\times10^{-8}\Omega\text{ m}$
$\text{D}-\ 2.3\times10^{3}\Omega\text{ m}$
Which material is:

Good conductor.
Resistor.
Insulator, and
Semiconductor

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Solution

Good conductor $= C (10 \times 10^{-8} $ ohm$).$
Resistor $= A (110 \times 10^{-8} $ ohm$).$
Insulator $= B (1 \times 10^{10} $ ohm$).$
Semiconductor $= D (2.3 \times 10^3 $ ohm$).$

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