Which of the following is not bad conductor?

Options

A. Mica
B. Iron
C. Wood
D. Rubber

Answer

To determine which of the following materials is not a bad conductor, we need to understand the definitions of conductors and insulators.

### Step-by-Step Solution:

1. **Understand Conductors and Insulators**:
- A **conductor** is a material that allows electricity to flow through it easily.
- An **insulator** is a material that does not allow electricity to flow through it easily.

2. **Identify the Materials**:
- The materials we are considering are mica, wood, rubber, and iron.

3. **Classify Each Material**:
- **Mica**: This is an insulator; it does not conduct electricity well.
- **Wood**: This is also an insulator; it does not conduct electricity well.
- **Rubber**: This is another insulator; it does not conduct electricity well.
- **Iron**: This is a conductor; it allows electricity to flow through it easily.

4. **Determine the Answer**:
- Since we are looking for a material that is not a bad conductor, we find that **iron** is the only material among the options that is a good conductor of electricity.

5. **Conclusion**:
- Therefore, the answer to the question "Which of the following is not a bad conductor?" is **iron**.