Physics Practical 2 Class 9 Important Viva Questions with Answers (Vernier Calliper)

 PRACTICAL 2:

To measure the area of cross section by measuring diameter of a solid cylinder with Vernier Calipers.

VIVA VOCE


1. How would you ensure that the solid cylinder is placed correctly between the jaws of the vernier calipers for accurate measurement?

Ans: Ensuring the cylinder is perpendicular to the jaws and gently placing it between them ensures accurate placement.

2. What precautions should be taken to minimize errors while measuring the diameter of the cylinder with vernier calipers?

Ans: Precautions include avoiding parallax error, ensuring proper alignment, and using a steady hand during measurement.

3. Can you explain how the vernier scale aids in obtaining more precise measurements compared to the main scale?

Ans. The vernier scale provides finer divisions than the main scale, allowing for more precise readings.

4. Describe the procedure for reading the measurement of the diameter on the vernier calipers.

Ans. To read the measurement, align the zero mark of the vernier scale with the nearest mark on the main scale, then note the corresponding mark on the vernier scale.

5. What factors could potentially introduce errors into your measurements, and how would you mitigate them?

Ans. Potential errors may arise from parallax, improper alignment, or irregularities in the cylinder's surface. These can be mitigated by careful measurement techniques and calibration.

6. How does the cross-sectional area of the cylinder relate to the measured diameter?

Ans. The cross-sectional area is proportional to the square of the diameter of the cylinder.

7. Could you explain the significance of measuring the diameter at multiple points along the length of the cylinder?

Ans. Measuring at multiple points helps identify any variations in diameter along the length, ensuring a more accurate representation of the cylinder's cross-section.

8. What is the mathematical formula used to calculate the area of the cross-section based on the measured diameter?

Ans. The formula for calculating the area of the cross-section is: Area = π * (diameter/2)^2.

9. How do you handle situations where the cylinder is not perfectly circular in cross-section?

Ans. Irregularities in the cylinder's shape may require averaging measurements or using other methods to estimate the true diameter.

10. What steps would you take to validate the accuracy of your measurements and ensure the reliability of your results?

 Ans. Validating accuracy involves checking the calibration of the vernier calipers, verifying measurements against a known standard, and repeating measurements to ensure consistency.


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