Free KCSE Physics Topical Questions KNEC Standards

Explain how the greenhouse gets warm.

28/7/2020

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K.C.S.E Physics Q & A - MODEL 2017PP2QN07

Explain how the greenhouse gets warm.

answer

The light passes through the walls and gets absorbed by the soil, emitting energy of longer wavelengths which cannot penetrate the walls hence get trapped within the green house causing heating.

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Explain the fact that radiant heat from the sun penetrates a glass sheet while radiant heat from burning wood is cut off by the glass sheet.

23/7/2020

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K.C.S.E Physics Q & A - MODEL 2013PP2QN11

Explain the fact that radiant heat from the sun penetrates a glass sheet while radiant heat from burning wood is cut off by the glass sheet.

answer

Sun being hotter produces short wavelength infrared waves which penetrate glass;
burning wood produces long wavelength infrared waves which do not penetrate glass.

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K.C.S.E Physics Q & A - MODEL 2012PP2QN010

21/7/2020

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K.C.S.E Physics Q & A - MODEL 2012PP2QN10

Figure 9, shows the cross-section of an optical fibre made of two types of glass A and B. The refractive index of B is lower than that of A.

A ray of light enters the optical fibre at P and emerges from Q.
(i) Sketch the path of the ray through the fibre.
(ii) State the reason why light travels through the fibre as in (i) above.

answer

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K.C.S.E Physics Q & A - MODEL 2009PP2QN16

17/7/2020

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K.C.S.E Physics Q & A - MODEL 2009PP2QN16

(a) Figure 10 shows a ray of light incident on a triangular glass prism and white screen S placed after the prism

(i) Complete the path of the ray through the prism to show how a spectrum is formed on the screen
(ii) A thermometer with a blackened bulb is placed at various parts of the spectrum. State with reason the region where the thermometer indicates the highest reading
(b) A pin is placed at the bottom of a beaker of depth 11.5 cm. The beaker is then filled with kerosene. By using another on the side of the beaker and observing from the top, the distance of the image of the pin in the beaker is found to be 3.5 cm from the bottom. Determine the refractive index of kerosene.

answers

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K.C.S.E Physics Q & A - MODEL 2009PP2QN07

17/7/2020

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K.C.S.E Physics Q & A - MODEL 2009PP2QN07

Determine the speed of light in water given that the speed of light in air is 3.0 x 108 ms^-1 and the refractive index of water is 1.33

answer

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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)

Explain how the greenhouse gets warm.

Explain how the greenhouse gets warm.

Explain the fact that radiant heat from the sun penetrates a glass sheet while radiant heat from burning wood is cut off by the glass sheet.

Explain the fact that radiant heat from the sun penetrates a glass sheet while radiant heat from burning wood is cut off by the glass sheet.

K.C.S.E Physics Q & A - MODEL 2012PP2QN010

K.C.S.E Physics Q & A - MODEL 2012PP2QN10

K.C.S.E Physics Q & A - MODEL 2009PP2QN16

K.C.S.E Physics Q & A - MODEL 2009PP2QN16

K.C.S.E Physics Q & A - MODEL 2009PP2QN07

K.C.S.E Physics Q & A - MODEL 2009PP2QN07

Determine the speed of light in water given that the speed of light in air is 3.0 x 108 ms^-1 and the refractive index of water is 1.33

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FORM I - PHYSICS SYLLABUS

FORM II - PHYSICS SYLLABUS

FORM III - PHYSICS SYLLABUS

FORM IV - PHYSICS SYLLABUS

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Explain how the greenhouse gets warm.

Explain how the greenhouse gets warm.

Explain the fact that radiant heat from the sun penetrates a glass sheet while radiant heat from burning wood is cut off by the glass sheet.

Explain the fact that radiant heat from the sun penetrates a glass sheet while radiant heat from burning wood is cut off by the glass sheet.

K.C.S.E Physics Q & A - MODEL 2012PP2QN010

K.C.S.E Physics Q & A - MODEL 2012PP2QN10

K.C.S.E Physics Q & A - MODEL 2009PP2QN16

K.C.S.E Physics Q & A - MODEL 2009PP2QN16

K.C.S.E Physics Q & A - MODEL 2009PP2QN07

K.C.S.E Physics Q & A - MODEL 2009PP2QN07

Determine the speed of light in water given that the speed of light in air is 3.0 x 108 ms-1 and the refractive index of water is 1.33

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

Determine the speed of light in water given that the speed of light in air is 3.0 x 108 ms^-1 and the refractive index of water is 1.33