IGCSE Physics Past Paper(alternative to practical)0625/62-May/June2025-CIE-Solution of Q1

Описание: In this video, we will solve IGCSE physics past paper alternative to practical 0625/62, May/June 2025 Question 1. We will discuss

1. A student determines the internal diameter d of a test-tube.
(i) fills a measuring cylinder with water up to the 100 cm3 mark pours some water from the measuring cylinder into the test-tube.
measure the height h in centimetres to the nearest millimetre.
Record your result in the top row of Table
(ii)Take the reading R of the volume of water remaining in the measuring cylinder.
Record your result in the top row of Table
(iii)Calculate the volume V of water poured into the test-tube. Use the equation:
V = (100cm3 – R). Record your result in Table
(b) The student:
• adds more water from the measuring cylinder into the test-tube
• measures the new height h of the water in the test-tube
• measures the new reading R of the water remaining in the measuring cylinder
• calculates the volume of water V in the test-tube
• repeats the procedure for three more values of h, R and V.
The student’s results are shown in Table 1.1.
It is important to avoid line-of-sight (parallax) errors when reading the scale of the measuring cylinder.
Describe how such errors are avoided. You may draw a diagram.
Plot a graph of V/cm3 (y-axis) against h/cm (x-axis). Start your axes at the origin (0,0).
(i) Draw the best-fit straight line.
(ii)Determine the gradient G of your line. Show all working and indicate on the graph the values you use.
The internal diameter d of a cylinder is given by the equation d = k G , where k = 1.13 cm.
Calculate d for the test-tube.
Suggest one reason why your calculated value for d is only approximate.

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