Question 1
The graph shows the magnetic flux through each turn of a 50-turn coil over 1.00 s. During which interval is the size of the average emf induced in the coil greatest, and what is that emf?
How to answer HSC Physics short-answer questions
Eighty marks in 20 to 25 items. Calculations need every step and a unit; written parts follow the command word: describe gives features, explain adds cause and effect, and assess or evaluate ends with a judgement.
| Marks | 80, in 20 to 25 items |
|---|---|
| Longest items | At least two worth 7 to 9 marks |
| Often on | An investigation, a device, data or a graph |
| Calculator | NESA-approved |
Write to the marks
- For a calculation, write each step with its formula, carry the units and give the answer to sensible significant figures.
- For explain, give the point, tie it to the object, device or data in the question, then say what it causes.
- For assess and evaluate, weigh a strength and a limitation, then give a judgement and its reason.
Use the stimulus
Quote the numbers, the objects or the result in the question. An answer that could be written without reading the stimulus is rarely a full-marks answer.
Try 2 questions
Question 2
| Nuclide | Binding energy per nucleon (MeV) |
|---|---|
| hydrogen-2 | 1.11 |
| helium-4 | 7.07 |
| iron-56 | 8.79 |
| uranium-235 | 7.59 |
The table gives the binding energy per nucleon of four nuclides. Which process would release energy?
Next step
Questions people ask
How long should a 7 to 9 mark answer be?
Long enough to make each point, tie it to the question and develop it. Plan two or three linked points and a judgement rather than a list.