1) Every instrument reading MUST record to the decimal place of the accuracy of the instrument.
Example:
Metre rule: 15 cm record as 15.0 cm or 0.150 m. NOT 15 cm or 0.15 m.
Stop-watch: 1:20:00 s record as 80.00 s. NOT 1.20 s or 1.20.00 s or 80 s.
Ammeter: (Refer below) Record as decimal place of 0.02 A. . NOT 0.1 A.
Voltmeter: (Refer below) Record as decimal place of 0.1 V. NOT as 1V.
2) DON'T write SI units in your table readings.
It makes your readings look like it has another number.
3) DO record all your readings to the SAME no. of decimal places in EACH column.
4) Do READ all the way to the end of the experiment to avoid redrawing your graph.
5) Do start both axes from ZERO if the question wants a Y-intercept reading.
-If don't need Y-intercept, you can start with any no.
-NEVER use ODD scale. eg. 0.3, 0.6, 0.9 or 0.133, 0.667....
6) Do choose a big scale for your graph.
(Your 1st point to the last point must cover >70% of graph paper, not your line)
7) Do write the title of your graph on the top of your graph paper.
(eg. Graph of A against B)
8) Do label your axes correctly AND with the SI units.
Examples:
- Graph of A against B. Means A = y-axis, B = x-axis
-Graph of W as horizontal axis and P as Vertical axis. Means W = x-axis, P = y-axis
9) Do draw a BEST-FIT Line or BEST-FIT curve. The question will tell you!
Best-fit means go in between your points.
10) Do draw a BIG gradient triangle AND label your coordinates for straight line graph.
11) DON'T have HAIRY lines.
12) Do use PENCIL.
Marks are penalized for graph drawn in pen.
13) DO draw a tangent to find gradient at a point.
This is for best-fit curve.
14) DO record all calculated readings AFTER the table recording in 3 significant figures.
15) DO TIME yourself to move onto the next experiment after 45 mins.
Set an alarm.
16) DO finish at least the graph.
17) DO read the instructions carefully and follow step-by-step.
Bring highlighters to highlight the important points.
Thats all guys, all the best tomorrow! :)
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