First Term SS3 Physics Lesson Note

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Scheme of Work

1. Electromagnetic Spectrum: Propagation, Detection and Uses
2. Gravitational Field: Law, Gravitational Potential, Escape Velocity, Potential Energy in Gravitational Field.
3. Electric Field: Coulombs Law, Electric Field Intensity, Electric Potential, Capacitor and Capacitance.
4. Electric Cells: Primary and Secondary Defects of Simple Cells. Cells in Series and Parallel.Electrolysis: Electrolytes, Electrodes, Ions, Faraday’s laws.
5. Electrical Measurement of Resistance: Resistivity, Conductivity, Conversion of galvanometer to ammeter and Voltmeter, Methods of Measuring Resistance.
6. Magnetism: Magnets and Magnetic Materials, Magnetization, Demagnetization, Magnetic Flux, Earth Magnetic Field.
7. Electromagnetic Field: Magnetic Field around Current Carrying Conductors- Straight Conductor, Circular Conductor, Solenoid, Applications of Electromagnets-Electric Bell, Telephone Ear Piece.
8. Electromagnetic Field: Force on Current Carrying Conductor in a Magnetic Field, Fleming’s Left Hand Rule, Application– DC. Motor, Moving Coil Galvanometers.
9. Electromagnetic Induction(i):Induced Current, Laws of Electromagnetic Induction, Flemings Right Hand Rule,Induction Coil.
10. Electromagnetic Induction(ii):Application in A.C and D.C. Generator, Transformer, and Power Transmission.

REFERENCE TEXTBOOKS
• New School Physics by Prof. M.W Anyakoha
• New System Physics by Dr. Chow.et.al
• WAEC Past Questions Pack
• UTME Past Question Pack
• Masters Physics Practical Manual

Week 1:

ELECTROMAGNETIC WAVES
CONTENT
 Definition and Concept
 Types of Radiation
 Detectors
 Uses
DEFINITION AND CONCEPT
Electromagnetic waves are produced by electromagnetic vibrations. Electromagnetic waves have electrical origin and the ability to travel in vacuum. So, electromagnetic waves are regarded as a combination of traveling electric and magnetic forces which vary in value and are directed at right angles to each other and to the direction of travel. In other words, they are transverse waves.

TYPES OF RADIATION
The electromagnetic waves consist of the following:
1. Radio waves with wavelength 10-3m to 1000m.
2. Infra-red waves with average wavelengths of 10-6m.
3. Visible spectrum, known as light waves, with wavelengths of 7 x 10-7 m for red rays.
4. Ultraviolet rays with wavelength of 10-8m
5. X- rays with wavelength of 10-10 m.
6. Gamma –rays with wavelength of 10-11m.

Radio waves: Radio waves have the longest wavelengths. Radio waves are emitted from transmitters and carry radio signals to radio sets. The shortest radio waves are called microwaves. Microwaves are used in radar and in heating hence they are used in cooking.
Infra-red waves Infra-red waves are found just beyond the red end of the visible spectrum. They are present in the radiation from the sun or from the filament of an electric lamp. Many manufacturing industries used infra-red lamps to dry paints on painted items. They are also used for the treatment of muscular problems.

VISIBLE SPECTRUM OR LIGHT WAVES
The visible spectrum is… Click here to order the complete Physics Lesson Note for SS3 first term

Week 2:

GRAVITATIONAL FIELD
CONTENT
 Introduction
 Law of Universal Gravitation
 Gravitational Potential
 Escape Velocity
 Potential Energy in Gravitational Field.
INTRODUCTION
Gravitational field is a region or space around a mass in which the gravitational force of the mass can be felt. Gravitation is the force of attraction exerted by a body on all other bodies in the universe. Gravitational force exists between a body and all other bodies around it. Gravitational force act between all masses and hold together planets, stars and galaxies. Each mass has a gravitational field around it.

LAW OF UNIVERSAL GRAVITATION
Newton’s law of universal of gravitation states that “every particle in the universe attracts every other particles with a force that is proportional to the products of their masses and inversely proportional to the square of the distance between them… Click here to order the complete first term Physics Lesson Note for SS3

Week 3:
ELECTRIC FIELD
CONTENT
 Electric Field
 Coulomb’s Law
 Electric Field Intensity
 Electric Potential
 Capacitors and Capacitance.
ELECTRIC FIELD
An electric field is a region of space which surrounds a system of electric charges. Electrical forces will act on any electric charge which is placed within the region. Electric field is a vector quantity. The direction of the field can be determined using a test charge (a small positive charge).
Fundamental Law of Electrostatics
The fundamental law of electrostatic states that: “Like charge repels, unlike charges attract… Click here to order the complete Lesson Note on Physics SS3 first term

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