Summary

• Description:

  The PDF document comprises KALA Joint Trials Physics Paper 2 2025 Mock Exam with Marking Scheme.

  It is a KCSE Physics Paper 2 (232/2) KALA Trial Examination (July 2025).

  • Duration: 2 Hours
  • Total Marks: 80
  • Number of Questions: 19 (Section A: Questions 1–14; Section B: Questions 15–19)
  • Marking Scheme: The marking scheme is in a different document.

  It covers the following topics:

  • Light and optics: shadows, defective eye correction, concave mirror ray diagrams
  • Refraction and total internal reflection in prisms (refractive index, critical angle, angle calculations)
  • Magnetism: magnetisation (domain theory) and electromagnetic effects
  • Sound: factors affecting speed of sound in air
  • Electrostatics and safety: petrol tanker earthing chain
  • Electricity and circuits: three-pin plug safety (earth pin), capacitors and charge calculations
  • Power transmission: stepping up voltage for transmission efficiency
  • Electromagnetic spectrum: identifying radiation between visible and X-rays
  • Cells and accumulators: lead-acid accumulator charging and gas release
  • Semiconductors: p–n junction behaviour and current differences in forward/reverse bias
  • Electron physics: cathode ray tube (Maltese cross shadow) and deflection systems
  • Electrical energy and power ratings (kW, V) and energy consumed (kWh)
  • Electromagnetic induction: Faraday’s law, simple DC generator parts/functions, induced e.m.f graphs, Lenz’s law
  • Resistor networks: current and resistance determination from given potential differences
  • Nuclear physics: alpha/beta emissions, half-life from graphs and calculations
  • Radiation detection: diffusion cloud chamber operation and advantages over a GM tube
  • Waves: stationary vs progressive waves, frequency from displacement–time graphs, ripple tank wavefronts
  • Photoelectric effect: factors affecting emission and demonstration using zinc plate and electroscope
  • X-rays: properties enabling imaging, adjustments for different applications, X-ray tube energy calculations
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  PHYSICS

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