These are the full revision notes which cover all the necessary knowledge required by the syllabus for the CAIE A Level Physics Paper 5 Exam (Planning, Analysis and Evaluation). It also covers typical past paper questions and it explains them with diagrams and extra info. The syllabus code is 9702....
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Cambridge International Paper
5 A Level Physics (9702)
Paper 5: Planning, Analysing
and Evaluation
1
,Contents INDEX Page number
-C1. Apparatus 3
-C2. Treatment of Uncertainties 5
-C3. Structure of Answer for Question 1 6
-C4. Extra Details for Different Types of Experiments 7
-C5. Past Paper Solved with Explanations 9
2
, AL
Apparatus
Signal Generator: can be used to produce a sound/voltage/current and
can vary frequency settings on device
Micrometre Screw Gauge: can be used to measure small lengths.
Vernier Callipers: can be used to measure small lengths.
Set Square: used to make sure that the apparatus is perpendicular, it must
be positioned at right angles between the rule and the horizontal surface.
Magnets: can be used with metal objects in experiments.
3
,Balance: can be used to weigh a mass.
Burette: accurately measuring volume of liquid/solvent.
Diffraction Grating: can be used to measure wavelength of a
monochromatic light source.
Pressure Experiments:
Manometer: measures pressure difference between two fluids.
Bourdon gauge: measuring pressure of a gas or liquid.
Pump: can be used to alter pressure in a container
Electrical Experiments
Variable Resistor (rheostat): can be used to alter voltage/current supplied
in a circuit or can be used to keep current constant.
LDR: resistance decreases with increasing light intensity
4
,Photocell: sensors that allow you to detect light. They generate an e.m.f
when light is incident
Treatment of Uncertainties
5
, Structure of Answer for Question 1
When answering this question, we must always include a drawing of the
practical we are going to carry out and the necessary apparatus, with
everything labelled.
Planning:
1. Independent Variable (The one you are deciding to change, goes on
the x-axis)
2. Dependent Variable (The one which changes due to changes in the
independent variable, goes on the y-axis)
3. Quantities to Control and keep constant.
Method of Data Collection:
4. Describe the method to be used to vary the Independent Variable
5. Explain how to measure the Independent Variable and the
instrument used.
6. Explain how to measure Dependent Variable and instrument used.
7. Describe the method to keep the control variables constant.
8. Include how the experiment will be carried out and some specific
details, (these details can also be added in the extra details section)
Analysis:
9. Explain how to make a Graph of a Straight Line.
10. State the Gradient. (You may also right the equation of the line)
11. State the Y-intercept
12. State Condition: If you obtain a straight line that goes through the
origin, then the relationship is true.
Safety Precautions:
13.Asses the Risks
14.Write the precautions, they are usually one or two.
Extra Details:
15. This space used it to add extra important things, or just add some
bits you forgot to say.
6
, Extra Details for Different Types of Experiments
Additional Details for Electrical Experiments:
1. Use a protective resistor to reduce current.
2. Switch off currents when not in use so that wires/coil do not
overheat.
3. Use microammeter and galvanometer for small voltages and
currents.
4. When using ammeter and voltmeter to measure resistance, a power
supply is required.
Type of current to use depending on experiment:
1. Large current to create a large magnetic field.
2. Large current to produce measurable e.m.f./voltage.
3. Small current to reduce heating effect.
Magnetic Field Experiments:
Hall probe: used to measure magnetic fields.
1. Keep Hall probe at right angles to magnetic field by fixing to rule.
2. Calibrate Hall probe in a known magnetic field.
3. Repeat experiment with Hall probe reversed and do an average.
4. In magnetic experiments, avoid external alternating magnetic fields.
Falling Bodies & Oscillations Experiments:
Measuring velocity using light gate:
1. Measure distance between light gates.
2. Connect light gates to time loggers. Calculate time of fall by using
data from loggers – time difference between when the first and
second beam are broken
3. For experiments with light weights or wind, close windows & switch
off air conditioning to avoid draughts.
4. For measuring time period of oscillations, find time for 10
oscillations and then divide by 10. To get average time for one full
oscillation.
7
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