Statement-I : Optical fibres are free from electromagnetic disturbances
Statement-II : Optical fibres are electrically insulated.

Options

A. Statetment-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-II is False
D. Statement-I is False, Statement-II is True

Answer

To solve the question regarding the statements about optical fibers, we will analyze each statement step by step.

### Step 1: Analyze Statement-I
**Statement-I**: Optical fibers are free from electromagnetic disturbances.

- Optical fibers transmit light signals through the principle of total internal reflection. This means that they do not rely on electrical signals, which are susceptible to electromagnetic interference. Therefore, they are less affected by electromagnetic disturbances compared to traditional electrical cables.

### Step 2: Analyze Statement-II
**Statement-II**: Optical fibers are electrically insulated.

- Optical fibers are made of glass or plastic, which are non-conductive materials. This means they do not conduct electricity, hence they are electrically insulated. This insulation helps in preventing any electrical interference from affecting the light signals traveling through the fiber.

### Step 3: Establish the Relationship Between the Statements
- Since optical fibers are electrically insulated (Statement-II), this characteristic contributes to them being free from electromagnetic disturbances (Statement-I). Thus, Statement-II serves as a valid explanation for Statement-I.

### Conclusion
Both statements are true, and Statement-II is the correct explanation for Statement-I.

### Final Answer
- Statement 1 is true, Statement 2 is true, and Statement 2 is the correct explanation for Statement 1.

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