K.C.S.E Physics Q & A - MODEL 2010PP2QN19

19/7/2020

K.C.S.E Physics Q & A - MODEL 2010PP2QN19

(a) State the property of radiation that determines the number of electrons emitted when a radiation falls on a metal surface.
(b) Figure 15 is a graph of the stopping potential Vs against frequency in an experiment on photoelectric effect.

(i) What is meant by stopping potential?
(ii) Given that the stopping potential Vs is related to the frequency by the equation

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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)

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Magnetism (12 Lessons)
Measurements II (16 Lessons)
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Waves II(10 Lessons)
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X-rays (8 Lessons)
Photoelectric Effect (15 Lessons)
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