MCQ Quiz On Measurement: Trivia!

The volume of the stone is 22 cm3 because it is the only value that is mentioned in the given results. The other values are not relevant to finding the volume of the stone.

Vernier calipers should be used to measure the internal diameter of a water pipe as accurately as possible. Vernier calipers are a precision measuring tool that can measure small distances with great accuracy. They have a sliding scale with a vernier scale that allows for precise readings. The other options, such as the meter rule, micrometer screw gauge, and measuring tape, are not as suitable for measuring small internal diameters accurately.

To measure the time for one oscillation of the pendulum accurately, timing 20 oscillations and then dividing the total time by 20 would be the most accurate method. This is because taking an average of multiple oscillations helps to minimize any errors or inconsistencies in timing. By dividing the total time by 20, we can obtain a more precise measurement of the time for one oscillation.

The period of a pendulum is the time it takes for one complete swing, from one extreme point to the other and back. In this question, the bob of the pendulum takes 17.6s to swing from P to Q and back to P again twenty times. To find the period, we divide the total time (17.6s) by the number of swings (20). This gives us a period of 0.88s.

A micrometer is the most suitable instrument for measuring the diameter of a pin because it provides precise and accurate measurements. A micrometer has a fine screw that allows for precise adjustments and a calibrated scale for reading measurements. On the other hand, a beaker has a larger internal diameter, and using a vernier caliper would be more appropriate. Vernier calipers have jaws that can be adjusted to fit the inside diameter of the beaker and provide accurate measurements. Using a ruler for either measurement would not provide the necessary level of accuracy.

The correct reading is 33.5 mm because the vernier scale is used to measure small increments. In the diagram, the zero on the vernier scale aligns with the 33 mm mark on the main scale, and the next marking on the vernier scale aligns with the 0.5 mm mark on the main scale. Therefore, the total reading is 33 mm + 0.5 mm, which equals 33.5 mm.

The vernier calipers are used to measure the diameter of the beaker. The diagram shows the enlargement of part of the vernier calipers, indicating that the measurement is being taken using the vernier scale. The vernier scale allows for more precise measurements by providing additional subdivisions. Among the given options, the measurement closest to the value indicated by the vernier scale is 4.18 cm, which is therefore the diameter of the beaker.

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The student should use a length-metre rule to measure the length of the wire because it provides accurate measurements for longer distances. For measuring the diameter of the wire, a micrometer should be used because it is capable of measuring small dimensions with high precision. A vernier caliper is not suitable for measuring the diameter of the wire as it is designed for measuring larger dimensions.

The period of a pendulum is the time it takes for one complete oscillation, which includes passing through the middle point (Y) twice. Since the stopwatch is started when the pendulum first passes through Y and stopped when it passes through Y for the twenty-first time, it means that the stopwatch has measured the time for 20 complete oscillations. Therefore, the period of the pendulum can be calculated by dividing the total time (T) by the number of complete oscillations (20), resulting in T/20. However, the question asks for the period of the pendulum, not the time for 20 oscillations. Therefore, the correct answer is T/10, which represents the period of the pendulum.