Summary

• Description:

  The MS Word document comprises MURANG'A EAST JOINT Physics Paper 3 2026 Mock Exam with Answers (Marking Scheme). The PDF version is also available upon your request. The marking scheme is in a different document.

  It was a KCSE Physics 232/3 practical examination.

  This practical examination evaluates hands-on laboratory proficiencies in mechanics, upthrust and relative density, geometrical optics and refraction, and electrical circuit resistivity analysis.

  • Duration: 2 Hours
  • Number of Questions: 2 Questions (Question 1 and Question 2)
  • Structure: 2 compulsory practical experiments: Question 1 (Mechanics, Principle of Moments, Upthrust, and Glass Block Refraction) and Question 2 (Current Electricity, Ohm's Law, and Resistivity Determination).

  It covers the following topics:

  • Question 1 (Flotation, Moments & Optics):
    • Part A (Principle of Moments & Upthrust): Balancing a metre rule on a knife edge, submerged mass measurements, calculating apparent weight in water and kerosene, determining liquid upthrust, and evaluating relative density
    • Part B (Refraction in Glass Block): Tracing ray paths through a rectangular glass block using optical pins, measuring lateral displacement distance against varying angles of incidence, plotting displacement-angle graphs, and determining zero-incidence displacement
  • Question 2 (Current Electricity & Resistivity):
    • Wire diameter precision measurement using a micrometer screw gauge across multiple points
    • Circuit assembly with cell holder, switch, mounted resistance wire, voltmeter, and milliammeter
    • Measuring potential difference and current across progressive wire lengths, calculating electrical resistance, plotting resistance against wire length, determining graph gradient, and evaluating wire resistivity
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  PHYSICS
• Posted By:

  Caleb_Peter

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