Free CXC Physics Paper 3 May/June 2014 past paper from 2014. Includes a worked answer key. Open the PDF, take a timed test, and study with AI on Caribbean AI.
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CSEC Physics Paper 3 May/June 2014 - Free CXC Past Paper with Answers
Free CXC Physics Paper 3 May/June 2014 past paper from 2014. Includes a worked answer key. Open the PDF, take a timed test, and study with AI on Caribbean AI.
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Every question from this paper as text. See the answers and worked solutions. Questions are the property of the Caribbean Examinations Council; Caribbean AI is not affiliated with CXC.
A teacher did a demonstration to show that temperature remains constant during a phase change. She heated 20 g of ice at for 20 minutes and the students read the thermometers at different intervals. Some of their observations are shown in Figure 1 below.
[20 marks]
Record the readings in Table 1 below.
TABLE 1
| Intervals | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| Time, t/s | 0.0 | 10.0 | 25.0 | 75.0 | 125.0 | 250.0 | 280.0 | 305.0 |
[8 marks]
Plot a graph, on page 3, of Temperature () versus Time (t/s).
[6 marks]
How much time did the change of phase take?
[2 marks]
How much heat is absorbed during the change of phase?
[Specific Latent Heat of Fusion of Ice = ]
[4 marks]
In an experiment to investigate the refraction of light through a glass block, a student produced the result shown in Figure 2.
Draw the path taken by the ray through the block.
[1 mark]
Use the graph to complete the table below.
| 1 | 0.11 | |
| 2 | 0.23 | |
| 3 | 0.50 | |
| 4 | 0.43 | |
| 5 | 0.77 | |
| 6 | 0.87 | |
| 7 |
[8 marks]
State TWO necessary precautions that the student should have taken in conducting the experiment.
[2 marks]
Calculate the gradient, , of the graph.
[4 marks]
What physical quantity does the gradient represent?
[1 mark]
It is known that the gradient is related to the speed of light, , in air and the speed of light, , in the glass such that .
Sandy made the following statement: "The resistance of a metallic conductor at a constant temperature is constant as the potential difference across it varies".
Using the filament of a light bulb, investigate if this statement is true for a range from 1.0V to 2.8V.
Your response should include: (a) EITHER A list of all the apparatus used OR A well-labelled diagram (b) A description of the procedure (c) How the data gathered is used to support or reject Sandy's statement
Write your answers to question 3 here.
[9 marks]
Apparatus
OR
Labelled diagram
[3 marks]
Procedure
[3 marks]
Use of Data to support/reject
[3 marks]
If , find the value of .
[3 marks]