Summary

• Description:

  The MS Word document comprises MASENO SCHOOL 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 Form 4 Physics Paper 3 practical examination.

  This practical examination assesses candidates' laboratory abilities in circuit assembly, electrical potential-current profiling, geometrical ray optics, and density determination using precision measuring instruments.

  • Total Marks: 40 marks
  • Number of Questions: 2 questions (Questions 1 – 2)
  • Structure: Question 1 (20 marks, current electricity and potential gradient) and Question 2 (20 marks, split into Part A geometrical optics and Part B density measurements)

  It covers the following topics:

  • Question 1 (Current Electricity):
    • Circuit configuration using dry cells, variable mounted resistance wire, voltmeter, ammeter, and bulb
    • Investigating current and potential difference variations with conductor length
    • Graph plotting of voltage against current for a filament lamp
    • Gradient calculation, resistance evaluation, and interpretation of non-ohmic conductor behavior
  • Question 2, Part A (Geometrical Optics):
    • Convex lens image formation on a screen using an illuminated object (candle flame)
    • Measuring object distance and image distance across variable focal alignments
    • Linear magnification calculations and determination of the focal length using the lens formula
  • Question 2, Part B (Mechanics and Mensuration):
    • Precision measurement of rubber bung dimensions using Vernier calipers
    • Mass determination using an electronic beam balance
    • Mathematical volume formulation and experimental density derivation of irregular truncated solids
• File Size:

  150.79 KB
• Length:

  6 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  Physics
• Posted By:

  Caleb_Peter

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