Project Work and Viva
The Project Work and Viva domain assesses a small practical project and the questions you answer about it. The examiner is checking whether you did the work and can explain the choices, the measurements and the safety.
Report structure
- Title, aim, apparatus or components list with ratings, brief theory, block or circuit diagram, procedure, observation table with units, result, conclusion, precautions and sources.
- Write the procedure so another student could repeat it; record raw readings, not just the final number.
Viva preparation
- Be ready to explain each block, why a component value was chosen, what the meter read, and what would change if a part were different.
- Expect safety questions: why the battery is disconnected, why a supply is current-limited, how a short is found.
- If something did not work, say so and explain the diagnosis; honest troubleshooting scores better than a perfect story.
Worked example
A project builds a USB charger tester with a 5 V load and a voltmeter. Aim: check whether a charger holds 5 V under load. Observations: 5.12 V open circuit, 4.65 V at 1 A. Conclusion: the charger sags under load and is unsuitable for fast charging. Reasoning: the drop exceeds the 5 percent limit of 0.25 V, so the result is a fail, not a pass.
Traps that cost marks
- Copying a report and then being unable to explain the circuit.
- No observation table or missing units.
- Ignoring safety in the write-up.
- Claiming results you did not measure.
Common viva questions
- Why does a lithium battery stop at 4.2 V?
- What is the difference between eMMC and UFS?
- Why is the charging IC separate from the PMIC?
- What does continuity mode prove?