If temperature is increased, the dielectric constant of a polar dielectric decreases whereas that of a non-polar dielectric does not change significantly
The magnitude of dipole moment of individual polar molecule decreases significantly with increase in temperature.

Options

A. Both A and R false
B. Both A and R true and R is not correct reason for A
C. A is true and R is false
D. Both A and R are true and R is correct reason of A.

Answer

To analyze the question regarding the behavior of polar and non-polar dielectrics with temperature changes, we can break down the solution into several steps:

### Step-by-Step Solution:

1. **Understanding Dielectric Constants**:
- The dielectric constant (κ) is a measure of a material's ability to polarize in response to an electric field, which affects its capacitance.
- Polar dielectrics have permanent dipoles, while non-polar dielectrics do not have permanent dipoles.

**Hint**: Recall the definitions of polar and non-polar dielectrics and their characteristics.

2. **Effect of Temperature on Polar Dielectrics**:
- As temperature increases, the thermal energy of the molecules also increases. This increased energy can disrupt the alignment of the dipoles in polar dielectrics.
- Consequently, the dielectric constant of polar dielectrics decreases with an increase in temperature because the effective polarization decreases.

**Hint**: Consider how thermal energy affects molecular motion and alignment in polar materials.

3. **Effect of Temperature on Non-Polar Dielectrics**:
- Non-polar dielectrics do not have permanent dipoles. Instead, they can develop induced dipoles when an external electric field is applied.
- The increase in temperature does not significantly affect the induced dipoles, so the dielectric constant remains relatively unchanged.

**Hint**: Think about the nature of induced dipoles and how they respond to temperature changes.

4. **Magnitude of Dipole Moment in Polar Molecules**:
- The dipole moment (p) of a polar molecule is defined as the product of the charge (q) and the distance (d) between the charges (p = q × d).
- As temperature increases, while the orientation of dipoles may become less aligned, the overall dipole moment of individual polar molecules does not decrease; rather, it may increase due to increased molecular motion.

**Hint**: Analyze how temperature influences molecular interactions and dipole alignment.

5. **Conclusion**:
- The first statement regarding the dielectric constant of polar dielectrics decreasing with temperature is correct.
- The second statement about the dipole moment of individual polar molecules decreasing with temperature is incorrect, as the dipole moment can increase due to increased molecular motion.

**Hint**: Summarize the findings and clarify which statements are true or false based on the analysis.

### Final Answer:
- The first statement is correct: The dielectric constant of polar dielectrics decreases with an increase in temperature.
- The second statement is incorrect: The magnitude of the dipole moment of individual polar molecules does not decrease with an increase in temperature; it may actually increase due to increased thermal motion.