Cambridge A Level Physics: December 2020

December 11, 2020

Paper 5 Q1 Answer Template (A Level 9702 Physics)

What is this practical paper about? Here's an intro briefing!

Important: Break your answer into sections with headers, and use point form when writing your answer!

A) DIAGRAM

Use ruler, draw a clear diagram (show relative positions of apparatus)
Label all apparatus (including the table!)

B) DEFINING THE PROBLEM

Independent variable: __________________
Dependent variable: ___________________
Constant variables: ___________________ (list 2-3 other possible variables)

C) METHODS OF DATA COLLECTION

1. Set up the apparatus as shown in the diagram above.
2. Vary the independent variable by _______________	❑ Include details how to vary ❑ Take preliminary readings to ensure workable range of variables ❑ Any safety considerations?
3. Measure the constant variable by ____.	❑ Include details how you would know the constant variable is unchanging. ❑ Measuring instrument(s) used
4. Measure the independent variable by ______________. *Clearly describe procedure in a logical sequence	❑ Include details on method & technique for reliable results ❑ Measuring instrument(s) used ❑ Any safety considerations? ❑ Any limitations/suggestions?
5. Measure the dependent variable by ______________. *Clearly describe procedure in a logical sequence	❑ Include details on method & technique for reliable results ❑ Measuring instrument(s) used ❑ Any safety considerations? Any limitations/suggestions?
6. Repeat procedure to obtain an average value for ________ (dependent variable)	❑ Details of averaging method to reduce uncertainty from random errors
7. Repeat steps ________ to _________ for different values of ______________ (independent variable)	❑ Mention how constant variables made sure they are kept constant as steps are repeated

D) METHOD OF ANALYSIS

1. In the given equation,
p is _______, q is ________, and
_______________ are constants.

❑ Identify IV/DV symbols

❑ Identify constants

2. Include math steps to linearize equation.
e.g. Taking log on both sides, log(y) = n log(x) + log(k)

❑ Put equation in linear form Y = mX + C

3. Plot a graph of _______ against _______

4. If the above relationship is true, a straight line graph will be obtained where the gradient is equal to _______ and the y-intercept is equal to ______________.

(constant to find) = ___(expression)_____.

Include expressions for

❑ Gradient

❑ y-intercept

❑ Constant to find