Summary

• Description:

  The MS Word document comprises CROSS COUNTY JET 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 Paper 3 examination.

  This laboratory practical paper tests candidates' hands-on experimental capabilities, precision measurements, graphical construction, and analytical evaluation of physical laws in mechanics, current electricity, and geometrical optics.

  • Duration: 2½ Hours
  • Number of Questions: 2 (Questions 1 - 2)
  • Structure: Two compulsory practical tasks: Question 1 (Mechanics and Principle of Moments) and Question 2 (Part A: Current Electricity and Potentiometer circuits; Part B: Geometrical Optics and Lens Formula).

  It covers the following topics:

  • Mechanics (Question 1):
    • Experimental balancing of a suspended metre rule using counterweights
    • Determination of liquid volumes, distance calibration, and reciprocal distance calculations
    • Graph plotting of volume against reciprocal distance (1/K)
    • Linear regression analysis: determining the slope, intercepts, and deriving unknown constants (d and m) representing liquid densities and mass configurations
  • Current Electricity (Question 2 Part A):
    • Measurement of electromotive force (E) and terminal potential difference using voltmeters
    • Closed circuit current measurements and determination of internal cell resistance
    • Ohm's law verification and resistance calculation for an unknown resistor
    • Potentiometer wire investigation: voltage drop across variable conductor lengths, ratio analysis, and potential gradient determination
  • Geometrical Optics (Question 2 Part B):
    • Determination of focal length (f) of a biconvex lens using distant object focusing
    • Real image formation using an illuminated object, lens, and screen
    • Object distance (u) and image distance (v) measurements
    • Evaluation and verification of the thin lens formula
• File Size:

  243.39 KB
• Length:

  8 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  Physics
• Posted By:

  Caleb_Peter

Enter your details below to initiate a payment using MPESA.