Statement I: Heater wire must have high resistance than connecting wires and high netallic point.
Statement II : If resistance is high , the electrical conductivity will be less.

Options

A. Statement I is True , Statement II is True , Statement II is a correct explanation for Statement I.
B. Statement I is True, Statement II is True , Statement II is NOT a correct explanation for statement I.
C. Statement I is True , Statement is False.
D. Statement I is False, Statement II is True.

Explanation

To analyze the statements provided in the question, we will break down the reasoning step by step.

### Step 1: Understanding Statement I
**Statement I**: "Heater wire must have high resistance than connecting wires and high melting point."

- **Analysis**:
- The heater wire is designed to convert electrical energy into heat energy. For this to happen efficiently, it must have a higher resistance than the connecting wires. This is because, according to the formula for power (P = I²R or P = V²/R), if the resistance (R) is high, the power (P) dissipated as heat in the heater will also be high, assuming the current (I) remains constant.
- Additionally, the heater wire must have a high melting point to prevent it from melting due to the heat generated during operation. If the melting point is low, the wire could fail and stop functioning.

**Conclusion for Statement I**: This statement is correct.

### Step 2: Understanding Statement II
**Statement II**: "If resistance is high, the electrical conductivity will be less."

- **Analysis**:
- Electrical resistance (R) and electrical conductivity (σ) are inversely related. The relationship can be expressed as:
\[ R = \frac{\rho L}{A} \]
where ρ is resistivity, L is the length of the conductor, and A is the cross-sectional area.
- Conductivity (σ) is the reciprocal of resistivity:
\[ \sigma = \frac{1}{\rho} \]
- Therefore, if resistance is high, it implies that resistivity is high, which means conductivity must be low. This confirms that higher resistance corresponds to lower conductivity.

**Conclusion for Statement II**: This statement is also correct.

### Step 3: Final Conclusion
- Both statements are correct, but they do not provide a direct explanation for each other. Thus, while both are true, Statement II does not serve as a correct explanation for Statement I.

### Final Answer:
- **Statement I is true.**
- **Statement II is true.**
- **Statement II is not the correct explanation for Statement I.**

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