NECO Physics: Topics to Focus On
NECO Physics topics ranked for 2027: mechanics, heat, waves and electricity first, then magnetism, atomic physics and electronics, with practice advice.
ExamPadi Editorial · Updated · 7 min read
Physics rewards the candidate who understands one idea at a time and builds on it. The topics look separate, but they share tools: quantities and units, rearranging formulae, reading graphs and drawing diagrams. Spend your first weeks on these tools through mechanics, and the rest of the syllabus becomes more manageable.
NECO does not give a topic-by-topic frequency list, so the three groups below are our own study-priority judgement for 2027, based on which topics the others depend on. They are not NECO's weighting. For the paper format, timing and any practical component, rely on the syllabus on neco.gov.ng.
The map of the subject
| Area | Examples |
|---|---|
| Measurement and mechanics | Units, motion, forces, work, energy, power, machines |
| Matter and heat | States of matter, expansion, heat capacity, change of state |
| Waves, sound and light | Wave properties, reflection, refraction, lenses, sound |
| Electricity | Current, voltage, resistance, circuits, power |
| Magnetism and electromagnetism | Magnets, fields, induction, motors, generators |
| Modern physics | Atomic structure, radioactivity, electronics |
Group one: must master
Mechanics. Distance, speed, velocity and acceleration; the equations of uniform motion; Newton's laws; work, energy and power; moments and simple machines. Original example: A 4 N weight hangs 20 cm from the pivot of a light beam. At what distance on the other side of the pivot must a 5 N weight hang to balance it? Clockwise moment equals anticlockwise moment, so 4 × 20 = 5 × d, giving d = 16 cm.
Electricity. Charge, current, potential difference and resistance; Ohm's law; series and parallel combinations; electrical power and energy. Practise drawing circuit diagrams and combining resistors. Most mistakes here come from using the wrong combination rule.
Heat and thermal physics. Temperature scales, thermal expansion, specific heat capacity, latent heat and gas laws as required by the syllabus. Learn the formulae with their units, and practise questions that move between them.
Group two: commonly tested
Waves, light and sound. Properties of waves, reflection and refraction, mirror and lens ray diagrams, and sound. Ray diagrams are skills: draw them with a ruler and label them.
Magnetism and electromagnetism. Magnetic fields and their patterns, the magnetic effect of a current, electromagnetic induction, and the working of motors, generators and transformers. Learn the rules for direction (as your teacher presents them) and use the same one consistently.
Atomic and nuclear physics. Atomic structure, radioactive decay and half-life. Half-life questions are short calculations once you see the pattern of halving.
Group three: lower priority
- Electronics. Basic components and simple ideas. Revise late.
- Fine detail of instruments. Know what each measures and how it is read; skip the long histories.
- Rarely used derivations. Learn the result, and the derivation only if the syllabus asks.
Working through a calculation
- List the quantities given and the one asked for, with units.
- Choose the formula that links them.
- Rearrange before substituting numbers.
- Substitute with units and compute.
- Check that the units and the size of the answer make sense.
Showing these steps protects marks even if an arithmetic slip occurs. If your course includes practical work, see the habits in WAEC Physics practical tips, which apply to similar practical skills such as reading instruments and recording measurements.
A practice plan
| Phase | Focus | Method |
|---|---|---|
| Weeks 1-2 | Units, motion, forces | Formula sheet, ten problems per session |
| Weeks 3-4 | Work, energy, heat | Worked examples, then timed sets |
| Weeks 5-6 | Electricity, waves, light | Circuit and ray diagram drills |
| Weeks 7-8 | Magnetism, atomic physics, electronics | Concept questions and short calculations |
| Final weeks | Everything | Mixed timed practice and an error log |
How to use past questions shows how to build a revision list from mistakes. For a wider plan, read how to pass NECO Physics, and see the NECO grading system for how results are reported.
Mistakes to avoid
- Using the wrong units, such as grams where kilograms are needed.
- Memorising formulae without knowing what each symbol means.
- Drawing circuits and ray diagrams without a ruler or labels.
- Trusting any "expo" on offer. Malpractice can cancel a result, and it teaches you nothing you can use in the paper.
Sense-checking your numbers
A wrong order of magnitude is the quickest error to spot, if you know what sizes are reasonable. Keep a short list of rough values in your head:
| Quantity | Rough size |
|---|---|
| Walking speed | about 1.5 m/s |
| Speed of sound in air | about 340 m/s |
| Speed of light | 3 × 10⁸ m/s |
| Acceleration of free fall | about 10 m/s² (use the value the question gives) |
| Density of water | 1,000 kg/m³ |
| Specific heat capacity of water | about 4,200 J/kg/K |
An original check: How long does a stone dropped from rest take to fall 20 m? Take g = 10 m/s². From s = ½gt², t² = 2 × 20 ÷ 10 = 4, so t = 2 s. If you had got 200 s or 0.02 s, the list above would have told you to look again.
Making the plan stick
Take one topic at a time with ten problems, then mix topics in the next session. Keep a formula sheet with units and the meaning of each symbol, and refresh it from memory every weekend. For diagrams, use a ruler and label every part.
Practise the topics
Start with mechanics and electricity, then widen out. ExamPadi has free NECO Physics questions with explanations and a timed CBT mode, so you can test each group as you finish it. The NECO hub covers your other subjects. No guide can promise a grade, but a short daily problem set will teach you more than rereading notes.
Practise with real past questions and worked answers
Practise NECO Physics freeFrequently asked questions
Which NECO Physics topic should I learn first?
Mechanics, covering motion, forces, work, energy and power. It teaches the habits of formulae, units and diagrams that every other topic uses.
How many formulae should I memorise?
Memorise the core relationships and learn how to derive or rearrange the rest. Know the units of each quantity. Check the current syllabus for any formulae supplied in the paper.
Is Physics all calculations?
No. Definitions, laws, diagrams and explanations carry marks alongside calculations. Prepare both.
Does NECO publish how often each Physics topic is tested?
No. The groups here are editorial judgement built on the syllabus structure and are not an official weighting.