Use this ZIMSEC O-Level Physics Paper 4 November 2012 marking scheme for checking answers, revision, and exam preparation in Zimbabwe.
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This is the ZIMSEC O-Level Physics marking scheme for Paper 4 from November 2012. It shows how marks are awarded, so you can mark your own answers.
Physics Practical Test
Question 1
Measurements and observations
M1 Readings (6 observations)
Write the number of readings as a ringed total by the results table
[3]
Check a value of the $V^{2}$. Tick if correct.
If incorrect, write in correct value and -1 .
Check a value for $\operatorname{Sin}^{2} \theta$. Tick if correct.
If incorrect, write in correct value and -1 .
ignore small rounding errors.
6 sets of readings scores 3 marks.
5 sets of readings scores 2 marks.
4 sets of readings scores 1 marks etc.
If help given by supervisor then -1 , excessive help the -2 .
If help was given from the supervisor then write 'SR' in a ring at the top of the front page of the candidate's script. Also, please indicate the type of help given in a written comment by the table of results.
M2 Repeated measurements of t and finding average ${ }^{-} \mathrm{t} / \mathrm{s}$
[1]
M13 Quality of results
Judge by scatter of points about the lines of best fit.
[1]
Presentation of Results
R. Column headings
Every column must be headed with a quantity and a correct unit
[1]
Allow $\theta$ in ${ }^{\circ}$ or a solidus notation occupying two lines. $\theta /{ }^{\circ}$
Do not allow $\theta^{\circ}$ or just $\theta$ (with not unit).
R2 Consistency of raw readings given in the table of results.
Apply to raw values of $t$ and $\theta$ only.
[1]
All readings of a particular quantity must be given to the same degree of precision (e.g. if one value of to is measured to 2 . p. then all values oft should be given to 2 d.p.).
Write $V_{c}$ at the foot of the column for each correct column of raw readings.
Ring any inconsistency noted, write $X_{\mathrm{c}}$ at the foot of the column, and -1 .
$\mathbb{R} 3$ SF in calculated quantities
Apply to $V^{2}$ and $\operatorname{Sin}^{2} \theta$
[1]