Cambridge International Examinations Cambridge International General ...

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Cambridge International Examinations Cambridge International General Certificate of Secondary Education

PHYSICS Paper 6 Alternative to Practical

Candidates answer on the Question Paper. No Additional Materials are required.

0625/62 February/March 2017

1 hour

READ THESE INSTRUCTIONS FIRST

Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE IN ANY BARCODES.

Answer all questions. Electronic calculators may be used. You may lose marks if you do not show your working or if you do not use appropriate units.

At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question.

The syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.

This document consists of 12 printed pages.

DC (ST/FC) 125968/9 ? UCLES 2017

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?10 0 10 20 30 40 50 60 70 80

10 20 30 40 50 60 70 80 90 100

2 1 Some students are investigating how the surrounding temperature affects the rate at which water

cools. They are using the apparatus shown in Fig. 1.1.

test-tube hot water

?C beaker

cold water

hot water

?C

warm water

beaker A

beaker B

Fig. 1.1 (a) Using Fig. 1.1

? record the temperature A of the cold water in beaker A,

A = ...............................................................

? record the temperature B of the warm water in beaker B.

B = ............................................................... [1]

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3

(b) The test-tubes of hot water are placed into beakers A and B.

The students record the temperatures of the water in the test-tubes every 30 s. Their readings are shown in Table 1.1.

Complete the units and the time column in Table 1.1.

Table 1.1

time

tube in beaker A with cold water

tube in beaker B with warm water

t /

/

/

0

80.5

81.0

52.5

64.5

42.0

55.0

36.0

50.5

32.5

48.0

30.5

46.5

29.0

45.5

[2]

(c) Describe two precautions that you would take, before reading the thermometer, to ensure that the temperature readings are as accurate as possible in the experiment.

1. ...............................................................................................................................................

...................................................................................................................................................

2. ...............................................................................................................................................

................................................................................................................................................... [2]

(d) Write a conclusion stating how increasing the temperature of the surrounding water affects the rate of cooling of the water in the test-tube.

Justify your answer by reference to the results in Table 1.1.

...................................................................................................................................................

...................................................................................................................................................

...................................................................................................................................................

...............................................................................................................................................[2]

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4 (e) Suggest one change to the experiment shown in Fig. 1.1 to ensure that the comparison of the

effect of surrounding temperature on cooling is a fair test. Explain why the change is an improvement. change ...................................................................................................................................... ................................................................................................................................................... explanation ............................................................................................................................... ...................................................................................................................................................

[2] (f) The students use a measuring cylinder to measure 200 cm3 of cold water.

Describe briefly how to read a measuring cylinder to obtain an accurate value for the volume of water. You may draw a diagram.

................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ...............................................................................................................................................[2]

[Total: 11]

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5 2 A student is investigating the resistance of three wires A, B and C. He is using the circuit shown in

Fig. 2.1. The circuit is set up to test wire A. The length, l of each wire is measured and recorded.

power supply

A

crocodile clip

A B C

resistance wires

Fig. 2.1

(a) On Fig. 2.1, draw a voltmeter connected so that it will measure the potential difference across

wire A.

[1]

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 ................
................

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