What is Electricity?

Electricity 

is the foundation of technological civilization and modernization in our society. Without Electricity we revert to the stone age,  no household appliances, telephone, light bulb, television and other electric device.

Electric Circuit

in an interconnection of the electrical elements. A simple electric circuit is consist of 3 basic elements:

1. A source of electrical potential difference or voltage. (typically a battery or electrical outlet)
2. A conductive path which would allow for the movement of charges. (typically made of wire)
3. An electrical resistance (resistor) which is loosely defined as any object that uses electricity to do work. (a light bulb, electric motor, heating element, speaker, etc.)

Current

is a flow of electrical charge carriers, usually electrons. The common symbols for current is I. The standard unit is the ampere, symbolized by A.

Voltage

is the electric potential difference between two points, or the difference in electric potential energy of a unit charge transported between two points. Voltage is equal to the work done per unit charge against a static electric field to move a charge between two points. A voltage may represent either a source of energy (electromotive force), or lost, used, or stored energy.

Power

is the rate at which electric energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second. Electric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries. Electric power is generally supplied to businesses and homes by the electric power industry.

Learning's 

      My learning in this 1st week in circuit is that many appliances (device) in our homes uses mains electricity to work. Without electricity our lives would be boring, no television , no computer games, no cellular phones, no radio. Modern society relies heavily on the convenience and versatility of electricity. It powers our light bulb for the safety of our house especially at night. When an electric charge builds up on the surface of an object it creates static electricity. You have probably experienced static electricity in the form of a small electric shock, which is what happens when the electric charge is quickly neutralized by an opposite charge. 

Electricity, simply put, is the flow of electric current along a conductor. This electric current takes the form of free electrons that transfer from one atom to the next. Thus, the more free electrons a material has, the better it conducts. so be careful of the electricity because our body is a good conductor.