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Physics Practical 1 Class 9 Important Viva Questions with Answers (Vernier Calliper)

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  PRACTICAL 1:  To measure the area of cross section by measuring diameter of a solid cylinder with vernier callipers VIVA VOCE: 1. Can you describe the step-by-step procedure for measuring the diameter of a solid cylinder using vernier calipers? Ans: The procedure involves gently placing the cylinder between the jaws of the vernier calipers, ensuring it's perpendicular to the jaws, and then closing the jaws until they grip the cylinder snugly. The diameter can be read directly from the main scale and the vernier scale. 2. Why is it important to ensure that the cylinder is placed perpendicular to the jaws of the vernier calipers during measurement? Ans:  Placing the cylinder perpendicular ensures that the diameter measurement is accurate and consistent. 3. How do you minimize parallax error while taking the reading on the vernier scale? Ans:  To minimize parallax error, align your eye perpendicular to the vernier scale and ensure that the scale is positioned parallel to your line o