A Physics calculation can go wrong before you enter any numbers. Practise choosing the formula, drawing a useful diagram and converting units, as well as doing the arithmetic.
Topics to check against your syllabus
| Topic area | Examples to practise |
|---|---|
| Mechanics (motion, forces, energy) | Equations of motion, Newton's laws, work and energy, moments |
| Electricity & Magnetism | Ohm's law, circuits, electromagnetic induction, magnetic fields |
| Waves, Sound & Light | Refraction, lenses, wave properties, sound |
| Measurement & Vectors | Units, significant figures, scalars vs vectors |
| Heat & Thermal Physics | Temperature scales, specific heat capacity, expansion |
| Electronics & Modern Physics | Basic semiconductors, introductory atomic/nuclear physics |
Misconceptions that show up again and again
- Believing a moving object needs a continuous force to keep moving. By Newton's first law, an object in motion stays in motion unless acted on by a net force. A lot of mechanics questions are really testing whether this idea has actually replaced the more intuitive but wrong version most people start with.
- Confusing speed and velocity. Speed is a scalar, velocity is a vector with direction. Questions that involve a change in direction, like an object moving in a circle, specifically test whether a student notices that velocity has changed even if speed hasn't.
- Mixing up series and parallel resistance rules. Resistors in series add directly; resistors in parallel use a reciprocal relationship. Applying the wrong rule to the wrong circuit type is one of the most common electricity mistakes on WASSCE scripts.
- Skipping units or using inconsistent ones mid-calculation. Physics answers are frequently marked down for a right method with the wrong or missing unit, or for mixing units (like cm and m) without converting first.
Write down the formula before substituting numbers
A habit that prevents a lot of avoidable errors: write the relevant formula on its own line first, then substitute values, rather than trying to combine both steps in your head. It also means an examiner can award method marks even if the final number is wrong.
How questions in this subject tend to be asked
Expect a mix of stating a definition or law, numerical problems that require substituting into a formula, questions that ask you to rearrange or derive a relationship, questions built around interpreting a graph (like a velocity-time graph), and questions that ask you to explain an experimental observation in words. The graph-interpretation and explanation questions are where students who only practiced plug-and-chug calculations tend to lose marks, since they require understanding what the numbers actually represent.
For how WAEC generally splits objective and theory questions across subjects, see How WASSCE Questions Are Structured.
Where to focus if your time is limited
Use recent practice to find gaps in calculations and explanations. Work on those gaps while keeping time for every topic and practical requirement in your current syllabus.
Practise a Physics topic
Generate questions on a topic such as motion or circuits. Work through the calculations yourself and check the feedback with your notes.
Practice Physics freeFrequently asked
Which WASSCE Physics topic should I prioritise if I'm short on time?
Start with a topic where recent answers show a gap. Mechanics and electricity offer useful calculation practice, but keep time for the other topics and practical requirements in your school syllabus.
Do I need a calculator for WASSCE Physics?
Many Physics questions are numerical and require substituting values into a formula, so check the current exam instructions for your year on what's permitted, since calculator policy can change between cycles.