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Introduction to Heating effect of an electric current – When current flows, electrical energy is transformed into other forms of energy i.e. light, mechanical and chemical changes. Factors affecting electrical heating Energy dissipated by current or work done as current
Electric fields – An electric field is the space around a charged body where another charged body would be acted on by a force. These fields are represented by lines of force.-This line of force also called an electric flux
Electric Potential Difference and Electric Current Electric current – Electric potential difference (p. d) is defined as the work done per unit charge in moving charge from one point to another. It is measured in volts.– Electric current is the rate of flow
Energy This is the ability to do work. Forms of energy a. Chemical energy: – this is found in foods, oils charcoal firewood etc.b. Mechanical energy: – there are four types; Transformation and conservation of energy – Any device that facilitates energy transformations is
Newton’s first law (law of inertia) – This law states that A body continues in its state of rest or uniform motion unless an unbalanced force acts on it.– Inertia is the property that keeps an object in its state of
Introduction to Linear Motion – It is the study of motion. It is divided into two. – In kinematics, forces causing motion are disregarded while dynamics deals with motion of objects and the forces causing them. I. Displacement – Distance moved by a
Fluid Flow: Introduction – Fluid in physics refers to liquids and gases. To study fluid flow we have to make the following assumptions: Streamline and Turbulent Flow – The path followed by a small element of a moving fluid is
Sound: Introduction – Sound is an important example of a longitudinal wave which is composed of both compressions and rarefactions.– The frequency range in which compressional disturbances occur is called the sonic spectrum and is very large.– Compressional waves with
Waves I: Introduction – A wave is simply a disturbance that moves through a medium. Other waves do not require a medium to travel i.e. they can travel in a vacuum, are known as electromagnetic waves e.g. radio, X-rays, gamma rays UV
Hooke’s Law: Introduction – Hooke’s law states that the extension of a spring is proportional to the applied force, provided that the force is not large enough to deform the spring permanently.– Mathematically expressed as Force α extension. Spring Constant – Since Force
What is Agriculture? Agriculture refers to a fundamental human activity, which i...
POPULATION STUDIES Is the general activities carried out for the purpose of acqu...
CONCEPT OF SOIL AND SOIL PROFILE Soil appears very complex and thus differe...
GROUND WATER WATER CYCLE Rain falls on the earth surface in filtrates (soaks int...
THEORIES THEORY OF ISOSTASY Denudation has been going on the continents where to...
GLOBE Is the model of the earth Earth Is ball of rock partly covered by wat...
Photograph are the true image pictures showing truly appearance of the earth’s...
What is a map? Map is a scaled conventional representation of the whole or any o...
INTRODUCTION TO SURVEYING Surveying is an art or a science of measuring and reco...
Definitions of Research – Research is the systematic investigation into a...
STATISTICS Statistics is a branch that deals with every aspect of the data. Stat...
