Welcome great EduPodian, here is your First Term SS3 Physics Scheme of Work and the excerpt of the First Term SS3 Physics Lesson Note.
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 ONE
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 made up of red, orange, yellow, green, blue, indigo and violet rays. These are all colours of the rainbow. When these rays combine, they form a white light. In the visible spectrum, red rays have the longest wavelengths while the violet rays have the shortest wavelengths. The main source of light is the sun.
ULTRA VIOLET RAYS
Ultra violet rays are located just beyond the violet end of the visible spectrum. Ultraviolet rays can be produced by quarts, mercury filaments, or the sun. Ultraviolet rays can cause certain materials to fluoresce (i,e glow).
X-RAYS
X-rays are produced when fast moving electrons strike a metal target, which reduces their velocity.X- rays are used in hospitals to destroy malignment growth in the body and to produce X–ray photographs which can locate broken bones, Much of X-ray in the body is harmful and can lead to sterility and adverse change in the blood. X-rays are used in industries to locate cracks in metal castings and flows in pipes.
X-rays ionize gases and have a penetrating effect such that they pass through substances opaque to white light are diffracted by crystals and unaffected by either electric or magnetic fields.
GAMMA – RAYS
Gamma – rays are emitted by radioactive substances such as cobalt. 60, uranium and polonium. Like x- rays, gamma rays ionize gases and darken photographic plates. Because of their shorter wavelengths gamma rays have a greater penetrating power…
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