Arrange the following materials in increasing order of their resistivity,
Nichrome, Copper, Germanium,Silicon

Options

A. `"Copper" lt "Nichrome" lt "Germanium" lt "Silicon"`
B. `"Germanium" lt "Copper"lt "Nichrome" lt "Silicon"`
C. `"Nichrome" lt "Copper" lt "Germanium" lt "Silicon"`
D. `"Silicon" lt "Nichrome" lt "Germanium" lt "Copper"`

Explanation

To arrange the materials Nichrome, Copper, Germanium, and Silicon in increasing order of their resistivity, we will first need to know the resistivity values of each material:

1. **Copper**: The resistivity of copper is \(1.7 \times 10^{-8} \, \Omega \cdot m\).
2. **Nichrome**: The resistivity of nichrome is \(100 \times 10^{-8} \, \Omega \cdot m\) or \(1.0 \times 10^{-6} \, \Omega \cdot m\).
3. **Germanium**: The resistivity of germanium is \(0.46 \, \Omega \cdot m\).
4. **Silicon**: The resistivity of silicon is \(2300 \, \Omega \cdot m\).

Now, we can list these resistivities in order from the lowest to the highest:

- **Copper**: \(1.7 \times 10^{-8} \, \Omega \cdot m\) (lowest resistivity)
- **Nichrome**: \(1.0 \times 10^{-6} \, \Omega \cdot m\)
- **Germanium**: \(0.46 \, \Omega \cdot m\)
- **Silicon**: \(2300 \, \Omega \cdot m\) (highest resistivity)

Now, arranging them in increasing order of resistivity, we have:

1. Copper
2. Nichrome
3. Germanium
4. Silicon

Thus, the final answer is:
**Increasing order of resistivity**: Copper < Nichrome < Germanium < Silicon