KCSE Physics Paper 1 2019 PDF – If You are among the Candidates that will be writing Physics in the upcoming KCSE exams this year, review the past paper 2, It is very helpful. After a successful download of the PDF of KCSE Physics Past Paper 1 for 2019, start practicing the KCSE Physics Paper 1 2019 consistently to see good results.

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There are KCSE Physics past Papers that will prepare You for the upcoming KCSE exams 2020, We believe that KCSE Physics questions and answers are worth It when it comes to revision for KCSE examinations. You must know that there are no new questions, it’s just a repetition of already-set Physics questions but in a different tricky form.

KCSE Physics PAPER 1 2019 with Answers

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Kenya Certificate of Secondary Education Physics Past Paper 

KCSE Physics Paper 1 2019

Physics KCSE 2019 Questions and Answers

PHY paper 1

SECTION A: (25 marks)

1. A micrometer screw gauge has a —0.03 mm error. State the reading that is observed on the instrument s’hen used to measure the diameter of a wire whose actual diameter is 0.38 mm. (1 mark)

It was observed that upon sucking the straw, milk did not rise up the straw. Explain this observation. (2 marks)

3. State two ways of reducing surface tension of a liquid. (2 marks)

4. Figure 2 shows a round bottomed flask containing a coloured liquid.

The flask is fitted with a capillary tube.

It is observed that on holding the flask with bare hands, the level of the liquid in the capillary tube initially drops slightly and then rises. Explain this observation. (3 marks)

5. figure, 3 shows two metal rods A and B of equal length made of the same material but different diameters.Wax is attached at one end of each rod . A source of heat is placed between the two metal rods

State with a reason, what is observed on the wax. (2 marks)

On the axes provided, sketch a displacement — time graph for a trolley moving down a frictionless inclined plane till it reaches the end of the incline.(1 mark)

7. A student carrying a heavy box using the right fund is observed to lean towards the left hand side. Explain this observntion. (2 marks)

8. Figure 4 shows a one meter long uniform rod of negligible weight supporting two weights.

Determine the position of the fulcrum from Ocm for the rod to remain in equilibrium. (3 marks)

9. State the meaning of the term “radian” as a unit of measurement. ( 1 mark)

10. For a fluid flowing at a velocity V in a tube of cross-sectional area A, VA = assumptions made in deriving this equation. (2 marks)

11. A stone of volume 800 cm3 experiences an upthrust of 6.5 N when fully immersed in a certain liquid.Determine the density of the liquid. (2 marks)

12. Figure 5 shows two springs C and D of the same length and equal number of turns made from the same wire.

State with a reason which of the two springs can support a heavier load before attaining the elastic limit. (2 marks)

13. Two boxes E and F of masses 2.0kg and 4.0kg respectively are dragged along a fiictioness surface using identical forces.

State with a reason which box moves with a higher velocity. (2 marks)

SECTION B (55 marks)

Answer all the questions in this section

14. (a) A student is provided with five 20g masses, a meter rule, a spring with a pointer,a stand,a boss and a clamp.

(i) In the space provided, sketch a labelled diagram of the setup that may be used in order to verify Hooke’s law using these apparatus. (3 marks)

(ii) State two measurements that should be recorded in order to plot a suitable graph so as to verify Hooke’s law. (2 marks)

(iii) Describe how the measurements made in (ii) can be used to determine tlic spring constant. (2 marks)

(b) A helical spring stretches by 0.6 cm when Supporting a weight Of 40 g. Determine the extension when the same spring supports a weight of 65 g. (3 marks)

15. (il) Figure 6 shows a bottle top opener being used to open a bottle.

Indicate on the diagram the direection of the load and the effort. (2 marks)

(b) State two ways in which an inclined plane can be made to reduce the applied effort when pulling a load along the plane. (2 marks)

(c) A block and tackle system has three pulleys in the upper fixed block and two pulleys in the lower movable block.

(i) Draw a diagram to show how the system can be set up in order to lift a load and indicate the position of the load and effort. (3 marks)

(ii) State the velocity ratio of the set up. (1 mark)

(iii) In such a block and tackle system an effort of 200N is required to lift a load of 600 N. Determine its efficiency. (3 marks)

16. (a) State the meaning of the term “heat capacity.” (1 mark)

(b) State how pressure affects the melting point of a substance. (3 marks)

(C) Figure 7 Shows a set up of apparatus that may be used to measure the specific latent heat of vaporisntion of stenm.

(i) Describe how the mass of condensed steam is determined. (3 marks)

(ii) Other than mass and time, state two other measurements that should be taken during the experiment. (2 marks)

(iii) Show how the measurements in (c)(ii) can be used to determine the specific latent heat of vaporisation of water. (2 marks)

(iv) State the precautions that should be taken so that the mass of the condensed steamed measured corresponds to the actual mass of steam collected during the time recorded in the eperiment (1 mark)

(v) State why it is not necessary to measure temperature in this set up. (1 mark)

17. (a) State what is meant by Brownian Motion (I mark)

(b) Figure 8 shows the graph of velocity against tiiiic for a small steel ball falling in a viscous liquid.

(i) Describe the motion of the steal ball as represented my port OA. (1 mark)

(ii) Explain why the velocity between A and B is constant. (3 marks)

(ii) velocity with which the ball hits the ground. 18. (a) Figure 9 shows a graph of pressure against temperature for a fixed mass of gas at constant volume

From the graph, determine the values of n and c given that P = nT + c where n and c are constants. (4 marks)

(b) Explain why it is not possible to obtnin zcro pressure of a gas in real life situation. (2 marks)

(c) A fixed mass of a gas occupies 1.5 x 10^-3m³ at a pressure of 760 mmHg and a temperature of 273 K. Determine the volume the gas will occupy at a temperature of 290 K and a pressure of 720 mmHg. (3 marks)

(d) State any three assumptions made in kinetic theory of gases. (3 marks)

KCSE Physics Paper 1 2019 Questions and Answers

KCSE Physics Marking scheme Paper 1 – Physics and PHY paper 1

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KCSE Physics Paper 2 2019

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KCSE Physics Paper 3 2019

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