Free KCSE Physics Topical Questions KNEC Standards

K.C.S.E Physics Q & A - MODEL 1999PP2QN06

7/7/2020

K.C.S.E Physics Q & A - MODEL 1999PP2QN06

a) Explain the following observations: ice cube float on water and solid benzene sinks in liquid benzene.
bi) You are provided with the following:
An overflow can - A beaker -A spring balance
A metal block -Water and - String
Describe an experiment to verify Archimedes principle.
ii) A block of wood weighing 2.0N is held under water by a string attached to the bottom of a container. The tension in the string is 0.5N. Determine the density of the wood.
ci) Define half – life of a radioactive material.
ii) Figure 6 shows a graph of the variation of the number of atoms of a certain radioactive material with time.
Figure6: Determine the half – life of the material

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K.C.S.E Physics Q & A - MODEL 1999PP2QN05

7/7/2020

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K.C.S.E Physics Q & A - MODEL 1999PP2QN05

a) A circuit consists of a battery, a metal wire, an ammeter and a switch connected in series. The switch is closed and the ammeter reading noted. The metal wire is now heated. State the observations made on the ammeter reading and give a reason for your answer.
b) An electric heater is made of a wire of resistance 100ohms and connected to a 240V mains supply. Determine the:
i) Power rating of the heater ii) Current flowing in the circuit.
iii) Time taken for the heater to raise the temperature of 200g of water from 23°C to 95°C.

(Specific heat capacity of water is 4200^-1K^-1)

iv) Cost of using the heater for two hours a day for 30 days.(The power and lighting company charges Kshs 5.00 per kilowatt — hour)

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K.C.S.E Physics Q & A - MODEL 1999PP2QN04

7/7/2020

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K.C.S.E Physics Q & A - MODEL 1999PP2QN04

Figure 5 represents a simple voltage amplifier circuit.

a) i) Identify the transistor in the circuit.
ii) Explain how the base bias is produced.
iii) Describe how an alternating signal that is fed in the input V1 is amplified.
b) When a signal is fed in the input, the collector current is 2.5mA. If the current gain is 62.5 and the voltage across the transistor (VCE) is 4.5V determine the :
i) Power rating of the heater
ii) Current flowing in the circuit.

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K.C.S.E Physics Q & A - MODEL 1999PP2QN03

7/7/2020

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K.C.S.E Physics Q & A - MODEL 1999PP2QN03

A tape attached to a moving trolley is run through a ticker timer. Figure 3 shows a section of the tape after running.

If the frequency of the ticker – timer is 50Hz, determine the:
i) Average velocity at intervals AB and CD.
ii) A average acceleration of the trolley.
b) A stone is released from a height, h. if the acceleration due to gravity is g, derive an expression of the velocity of the stone just before hitting the ground.
c) Figure 4 (a) shows a velocity – time graph of an object in motion.

Sketch on the axes provided in figure b4 (b0, the displacement – time graph of the Motion
(Motion upwards is taken as positive.

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K.C.S.E Physics Q & A - MODEL 1999PP2QN01

7/7/2020

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K.C.S.E Physics Q & A - MODEL 1999PP2QN01

a) Distinguish between longitudinal and transverse waves
b) In the Young‟s double slit experiment, and interference pattern of bright and dark fridges was formed as shown in figure 1 by alight of wavelength coming from two narrow slits X and Y.

i) Write an expression for the path difference between XP and YP where corresponds to the 2nd bright fringe.
ii) Explain how the dark and bright fringes are formed.
iii) State and explain what would be observed on the screen if the slits X and Y were made large.
c) Figure 2 represents a displacement – time graph for a wave.

i) Determined the frequency of the wave.
ii) Sketch on the same axes, the displacement – time graph of a wave of the same frequency but 180 out of phase and with a smaller amplitude.

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FORM I - PHYSICS SYLLABUS

Introduction to Physics (4 Lessons)
Measurements 1 (12 Lessons)
Force (16 Lessons)
Pressure (24 Lessons)
Particulate Nature of Matter (12 Lessons)
Thermal Expansion (12 Lessons)
Heat Transfer
Rectilinear Propagation of Light and Reflection at Plane Surface (16 Lessons)
Electrostatics (12 Lessons)
Cells and Simple Circuits (12 Lessons)

FORM II - PHYSICS SYLLABUS

Magnetism (12 Lessons)
Measurements II (16 Lessons)
Turning Effect of Force (10 Lessons)
Equilibrium Centre of Gravity (12 Lessons)
Reflection at Curved Surfaces (16 Lessons)
Magnetic Effect of Electric Current (18 Lessons)
Hooke's Law (8 Lessons)
Waves (14 Lessons)
Sound (12 Lessons)
Fluid Flow (14 Lessons)

FORM III - PHYSICS SYLLABUS

Linear Motion (20 Lessons)
Refraction of Light (20 Lessons)
Laws of Motion (15 Lessons)
Energy, Power and Machines (20 Lessons)
Current Electricity (20 Lessons)
Waves II(10 Lessons)
Electrostatics II (15 Lessons)
Heating Effect of Electric Current (10 Lessons)
Quantity of Heat (20 Lessons)
Gas Laws (15 Lessons)

FORM IV - PHYSICS SYLLABUS

Thin Lenses (20 Lessons)
Uniform Circular Motion (10 Lessons)
Floating and Sinking (15 Lessons)
Electromagnetic Spectrum (15 Lessons)
Electromagnetic Induction (20 Lessons)
Mains Electricity (10 Lessons)
Cathode Rays and Cathode Ray Tube (10 Lessons)
X-rays (8 Lessons)
Photoelectric Effect (15 Lessons)
Radioactivity (15 Lessons)
Electronics (10 Lessons)

K.C.S.E Physics Q & A - MODEL 1999PP2QN06

K.C.S.E Physics Q & A - MODEL 1999PP2QN06

K.C.S.E Physics Q & A - MODEL 1999PP2QN05

K.C.S.E Physics Q & A - MODEL 1999PP2QN05

(Specific heat capacity of water is 4200^-1K^-1)

iv) Cost of using the heater for two hours a day for 30 days.(The power and lighting company charges Kshs 5.00 per kilowatt — hour)

K.C.S.E Physics Q & A - MODEL 1999PP2QN04

K.C.S.E Physics Q & A - MODEL 1999PP2QN04

K.C.S.E Physics Q & A - MODEL 1999PP2QN03

K.C.S.E Physics Q & A - MODEL 1999PP2QN03

K.C.S.E Physics Q & A - MODEL 1999PP2QN01

K.C.S.E Physics Q & A - MODEL 1999PP2QN01

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FORM II - PHYSICS SYLLABUS

FORM III - PHYSICS SYLLABUS

FORM IV - PHYSICS SYLLABUS

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K.C.S.E Physics Q & A - MODEL 1999PP2QN06

K.C.S.E Physics Q & A - MODEL 1999PP2QN06

K.C.S.E Physics Q & A - MODEL 1999PP2QN05

K.C.S.E Physics Q & A - MODEL 1999PP2QN05

(Specific heat capacity of water is 4200-1K-1)

iv) Cost of using the heater for two hours a day for 30 days.(The power and lighting company charges Kshs 5.00 per kilowatt — hour)

K.C.S.E Physics Q & A - MODEL 1999PP2QN04

K.C.S.E Physics Q & A - MODEL 1999PP2QN04

K.C.S.E Physics Q & A - MODEL 1999PP2QN03

K.C.S.E Physics Q & A - MODEL 1999PP2QN03

K.C.S.E Physics Q & A - MODEL 1999PP2QN01

K.C.S.E Physics Q & A - MODEL 1999PP2QN01

Categories

FORM I - PHYSICS SYLLABUS

FORM II - PHYSICS SYLLABUS

FORM III - PHYSICS SYLLABUS

FORM IV - PHYSICS SYLLABUS

Archives

M.A Nyamoti

HIGH SCHOOL RESOURCES

PRIMARY SCHOOL RESOURCES 8-4-4

PRIMARY SCHOOL RESOURCES CBC

COLLEGE RESOURCES

FREE NOVELS

Send Us a Message

(Specific heat capacity of water is 4200^-1K^-1)