A micrometer screw gauge has a zero error of mm. When it is used to measure the diameter of a ball bearing, the sleeve scale reads 5.5 mm and the thimble scale reads 27. Determine the actual diameter of the ball bearing.[2]
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KCSE Physics232
2 papers160 marks4 h
What we predict comes up
From the syllabus weighting and how the papers are usually set. The papers below follow it.
- Thermal physics and gas laws19%Gas laws, quantity of heat and the particulate nature of matter give Paper 1 several short items and at least one long question.
- Mechanics: motion, moments and machines18%Rectilinear motion, Newton's laws, moments and machines carry a full Section B question or two on Paper 1 every year.
- Modern physics15%Photoelectric effect, the CRO, X-rays and radioactive half-life together fill a large share of Paper 2.
- Measurement, forces and pressure14%Instruments, density, Hooke's law and pressure (hydraulics, barometers) are routine Paper 1 openers.
Paper 1
2 h · 80 marks · Calculator allowed
- This paper has two sections: A and B.
- Answer ALL the questions in sections A and B in the spaces provided.
- All working MUST be clearly shown.
- Non-programmable silent electronic calculators may be used.
- Take the acceleration due to gravity, g, as 10 N/kg (10 m/s²) unless stated otherwise.
Answer or mark a question and your score adds up here.
Section A25 marks
Answer all the questions in this section. (25 marks)
An empty density bottle has a mass of 25.0 g. When full of water its mass is 75.0 g, and when full of a liquid its mass is 65.0 g. Calculate the density of the liquid in . (Density of water )[2]
Smoke particles viewed under a microscope in a smoke cell are seen to move about randomly. Explain this observation.[1]
14 more questions
Every paper, every question, the answers and the mark scheme. Free with a Knomi account.
Not included: Paper 3 (232/3), the practical, is sat in the laboratory with apparatus and is not included.