Summary

• Description:

  The MS Word document comprises Navakholo Joint Examination Physics Paper 3 (Practical) March 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 KCSE Physics Paper 3 (Practical) examination. This paper assesses Form 4 candidates' ability to conduct experiments, record observations accurately, plot graphs, determine constants, and apply practical Physics skills — central competencies tested in the national practical examination.

  • Month Administered: March 2026
  • Duration: 2½ hours
  • Total Marks: 40
  • Number of Questions: 2 (both compulsory)
  • Structure:
    • Question 1 – 20 marks
    • Question 2 – 20 marks (Part A and Part B)

  It covers the following topics:

  • Question 1 — Oscillations and Gravity (Pendulum Experiment):
    • Determining the volume of water using a measuring cylinder and calculating moment of inertia constant I
    • Measuring period T for varying wire lengths L (70 cm to 20 cm), completing a data table
    • Plotting a graph of T² against L
    • Determining the slope of the graph
    • Using the relationship T² = 4π²L/G to determine the constant G from the graph
  • Question 2 — Electrical Measurements and Optics (Part A and Part B):
    • Part A — Resistance of a nichrome wire: measuring EMF, recording voltmeter and ammeter readings at varying lengths (10, 20, 30 cm), determining X from the equation V = X – 0.3I, measuring wire diameter with a micrometer screw gauge, calculating resistance R = V/I, and determining resistivity using R = 4ρ/πd²
    • Part B — Focal length of a converging lens: finding approximate focal length using a distant object, recording image distances v for object distances u = 40, 45, 50 cm, calculating magnification m and focal length f = v/(m+1) for each value
• File Size:

  473.51 KB
• Length:

  8 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  PHYSICS
• Posted By:

  Caleb_Peter

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