Summary

• Description:

  The MS Word document comprises CEKENAS Physics Paper 2 2026 Pre-Mock Exam with Marking Scheme. The PDF version is also available upon your request. The marking scheme is in a different document.

  It was a CEKENAS Form 4 Physics Paper 2 examination covering geometric optics, waves, electricity, magnetism, and electromagnetism. This paper provides rigorous preparation for the KCSE physics theory examination, accessible via PDF download with marking scheme answers.

  • Month Administered: March/April 2026
  • Duration: 2 Hours
  • Total Marks: 80 Marks
  • Number of Questions: 20 (Questions 1–20)
  • Structure: Section A (25 marks, compulsory short Questions 1–13) and Section B (55 marks, compulsory long Questions 14–20).

  It covers the following topics:

  • Section A
    • Reflection at plane surfaces and ray construction
    • Rectilinear propagation of light and shadow formation
    • Magnetic field patterns around soft iron rods
    • Magnetic storage and soft iron keepers
    • Accumulator testing and maintenance parameters
    • Primary vs. secondary chemical cells
    • Electrostatic induction on metallic spheres
    • Electromagnetic induction and Lenz's law
    • Sound velocity measurement using echo method
    • Infrared radiation detectors and electromagnetic spectrum
    • Transverse vs. longitudinal wave characteristics
    • Simple cell defects (Polarization and local action)
    • Total internal reflection conditions
  • Section B
    • Sound wave interference (Constructive vs. destructive interference, loudness along lines)
    • Wave parameters (Periodic time, frequency, wavelength, and wave speed calculations)
    • Current electricity (Determining e.m.f. and internal resistance from $V-I$ graphs, Wheatstone meter bridge calculations)
    • Reflection at curved surfaces (Concave shaving mirrors, $1/u$ vs. $1/v$ focal length determination, convex mirror ray diagrams)
    • Refraction and thin lenses (Short-sightedness eye defect correction, convex lens magnification and focal length)
    • Electrostatics and capacitance (Electroscope divergence, parallel plate capacitors, stored charge, electric field patterns, sharp point discharge)
    • Refraction of light (Snell's law, critical angle, glass refractive index, speed of light in glass)
    • Electromagnetism and motor effect (Right-hand grip rule, parallel conductor force directions, DC motor split-ring commutators)
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  PHYSICS
• Posted By:

  Caleb_Peter

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