The solids which are good conductor of electricity should have conductivities in the order of

Options

A. `10^(7)Omega^(-1)m^(-1)`
B. `10^(-20)Omega^(-1)m^(-1)`
C. `10^(-6)Omega^(-1)m^(-1)`
D. `10^(4)Omega^(-1)m^(-1)`

Answer

To determine the range of conductivities for solids that are good conductors of electricity, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Conductivity Ranges**:
- Conductors, insulators, and semiconductors have different ranges of electrical conductivity measured in ohm-meters (Ω·m).
- Conductors have high conductivity, insulators have very low conductivity, and semiconductors have intermediate conductivity.

2. **Identify the Ranges**:
- The range of conductors is typically from \(10^4\) to \(10^7 \, \text{S/m}\) (Siemens per meter).
- The range of insulators is from \(10^{-20}\) to \(10^{-10} \, \text{S/m}\).
- The range of semiconductors is from \(10^{-6}\) to \(10^{-4} \, \text{S/m}\).

3. **Determine the Highest Order**:
- Among these ranges, the highest order of conductivity is found in conductors, which is \(10^7 \, \text{S/m}\).
- The minimum conductivity for good conductors is \(10^4 \, \text{S/m}\).

4. **Conclusion**:
- Therefore, the solids that are good conductors of electricity should have conductivities in the order of \(10^4\) to \(10^7 \, \text{S/m}\).

### Final Answer:
The solids which are good conductors of electricity should have conductivities in the order of \(10^4\) to \(10^7 \, \text{S/m}\).

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