### Emission Spectra

Major objective of this lecture is to present on Emission Spectra. The spectrum formed by electromagnetic radiations emitted by a given source, characteristic of the source and the type of excitation inducing the radiations. Emission spectra are produced by thin gases in which the atoms do not e.....

### Lecture on Electromagnetism

Main objective of this lecture is to present on Electromagnetism. A magnetic field is produced when an electric current flows through a coil of wire. This is the basis of the electromagnet. Magnets have both a north pole and a south pole. The magnetic lines of force flow from pole to pole as .....

### Using Voltmeters and Ammeters

The aim of this lecture is to describe on using Voltmeters and Ammeters. A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. An ammeter is a measuring device used to measure the electric current in a circuit. A voltmeter is.....

### Electricity Practical Example and Experiment

Prime objective of this lecture is to present on Electricity; Practical Example and Experiment. Electricity includes: Charges; Electrons; Voltage; Current; Series; Parallel and Resistance. Electrical phenomena have been studied since antiquity, though progress in theoretical understandin.....

### Sources of Electricity

Electricity can be very dangerous. You should never put anything into electric sockets, except plugs. There are many sources of electricity such as: Fossil fuels: coal, oil and wood. Sources of electricity were fossil fuels 67%, renewable energy 16% (mainly hydroelectric, wind, solar and biomas.....

### Types of Circuit

There are two types of electrical circuits; A collection of wires and electric components connected together in such a way that electric current can flow through them. – Series Circuit and Parallel Circuit. In Series Circuit; the components are connected end-to-end, one after the other. .....

### Introduction to Electricity

General objective of this lecture is to present on Introduction to Electricity. Electricity is a type of energy that can build up in one place or flow from one place to another. Electricity is all around us–powering technology like our cell phones, computers, lights, soldering irons, and air.....

### Electrical Safety and Prevention

Appliances have three safety devices: the fuse; the earth wire and the switch. These devices are designed to stop you from being electrocuted and to prevent the appliance from being damaged. A fuse is a thin piece of wire which will melt when too much current passes through it. The fuse stops .....

### Electrical Safety in Home

Electrical hazards can cause burns, shocks and electrocution (death). Prime purpose of this lecture is to present on Electrical Safety in Home. by this lecture you can understand the effects of electric shocks; how a plug should be wired correctly; how electrical safety devices work etc. All el.....

### Electric Circuits

Prime purpose of this lecture is to present on Electric Circuits. The cell stores chemical energy and transfers it to electrical energy when a circuit is connected. When two or more cells are connected together we call this a Battery. The cells chemical energy is used up pushing a current rou.....