Physics Form 3 Annual Examination & Answers (Marking Guide)
Download Physics Form Three Annual Exam with Marking Schemes for free.
COMPETENCY BASED ASSESSMENT PHYSICS ANNUAL EXAMINATION 2025
SECTION C (30 Marks)
Answer any two questions
9. (a)A wire is Answer is carrying current is it charged?
(b)Explain the following
i. A Kettle of water with steady supply of heats taken much longer time to boil dry it does to reach its boiling point.
ii. How does molecular theory of matter account for drop in temperature which results when for evaporation of volatile liquid occurs
(c)Why is a dull Black surface a better absorber of heat than a brightly polished surface?
10. (a) In which way does a wire carrying electric and placed between the poles of two magnets as shown in figure below tend to move? Explain your answer
(b)Explain any four (4) causes of power looses in a transformer that can reduce the efficiency of the transformer
(c)A 240V mains transformer has 1000 turns in its primary coil and it is designed to supply electrical energy to a 12V, 24W lamp. Determine the efficiency of the transformer if the current drawn from the 240V mains is 0.125A
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