About KCSE Physics
KCSE Physics is one of the most demanding sciences on the Kenyan secondary curriculum, but it carries massive weight in engineering, architecture, aviation and computer-science admissions. The syllabus moves from measurement and Newtonian mechanics through waves, electricity, electromagnetism, thermodynamics and modern physics. Most candidates lose marks not on the physics itself but on careless unit conversions, mis-rearranged equations and skipped diagram labels. The topics below break the syllabus into focused practice sets — work through each in order if you're starting from scratch, or jump to your weakest topic via the navigation cards.
Paper structure
Physics has THREE papers: Paper 1 (short structured, 80 marks), Paper 2 (long structured + essays, 80 marks), and Paper 3 (practical, 40 marks). Paper 3 typically tests measurement, error analysis and a single experimental investigation.
Top exam tips
- Always write SI units — answers without units lose the unit mark even if numerically correct.
- Show free-body diagrams in every mechanics question; examiners give credit for labelled forces.
- Use 'g = 10 m/s²' unless the question specifies otherwise — saves arithmetic errors.
- For electrical circuit questions, redraw the circuit before solving — many mistakes come from misreading the diagram.
All Physics Topics
Tap any topic to see full revision notes, practice questions and marking schemes.
Introduction to physics and applications
Measurement and SI units
Errors, accuracy and precision
Distance and displacement
Speed, velocity and acceleration
Newton's laws of motion
Forces and friction
Moments and equilibrium
Pressure in solids
Pressure in liquids
Atmospheric pressure
Work, energy and power
Conservation of mechanical energy
Simple machines
Thermal expansion of solids
Thermal expansion of liquids and gases
Heat transfer by conduction
Heat transfer by convection
Heat transfer by radiation
Wave properties
Wave reflection and refraction
Sound production and transmission
Characteristics of sound
Light propagation
Reflection of light
Refraction of light
Lenses and image formation
Electrostatics
Electric current and circuits
Ohm's law
Cells and batteries
Magnetism
Electromagnetism
Electromagnetic induction
Radioactivity
Semiconductors
Diodes
Transistors
Particulate nature of matter
Evidence for particles, Brownian motion, states of matter, diffusion
Hooke's law
Hooke's law, spring constant, spring balance, elastic limit
Fluid flow
Streamline and turbulent flow, equation of continuity, Bernoulli's effect and applications
Heating effect of electric current
Factors affecting electrical energy, P=VI, heating devices
Quantity of heat
Specific heat capacity, latent heat, boiling/melting points, calorimetry
Gas laws
Boyle's law, Charles' law, pressure law, absolute zero, kinetic theory
Uniform circular motion
Angular velocity, centripetal force, banked tracks, centrifuge
Floating and sinking
Archimedes' principle, law of flotation, relative density, applications
Electromagnetic spectrum
EM wave types, properties, detection and applications
Mains electricity
Power transmission, domestic wiring, kWh, cost of electricity
Cathode rays
Production and properties of cathode rays, CRO, TV tube
X-rays
Production, properties, soft/hard X-rays, dangers, uses
Photoelectric effect
Photons, threshold frequency, work function, Einstein's equation, applications
Linear motion
Distance, displacement, speed, velocity, acceleration, motion graphs, equations of motion, free fall, projectiles
Frequently asked questions about KCSE Physics
What does the KCSE Physics syllabus cover?
KCSE Physics is one of the most demanding sciences on the Kenyan secondary curriculum, but it carries massive weight in engineering, architecture, aviation and computer-science admissions. The syllabus moves from measurement and Newtonian mechanics through waves, electricity, electromagnetism, thermodynamics and modern physics. Most candidates lose marks not on the physics itself but on careless unit conversions, mis-rearranged equations and skipped diagram labels. The topics below break the syllabus into focused practice sets — work through each in order if you're starting from scratch, or jump to your weakest topic via the navigation cards.
How is KCSE Physics examined?
Physics has THREE papers: Paper 1 (short structured, 80 marks), Paper 2 (long structured + essays, 80 marks), and Paper 3 (practical, 40 marks). Paper 3 typically tests measurement, error analysis and a single experimental investigation.
How many Physics practice questions are on HighMarks?
HighMarks has 52 Physics topics and 5653+ practice questions, each with a detailed marking scheme. The first three questions per topic are free; sign up to unlock the rest, plus mock exams and past papers.
How should I revise Physics for KCSE?
Start with the topics you find weakest, work through the lesson notes and key points, then practise questions in increasing difficulty. Sign up for HighMarks to get a personalised study plan that adapts to your weak areas, plus timed mocks and detailed performance tracking. See pricing.
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More KCSE resources
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