THEORY OF ELECTRICITY
As a form of energy which cannot be seen this is found every where. It come in two forms statics and dynamic.
STATIC ENERGY -NATURAL
DYNAMIC ENERGY -MAN MADE
LAW OF ELECTRYCITY
Like poles repel each other unlike poles attract each other . An atom is composed of –Protons- positively charged, Neutrons- natural, Electrons- negatively charged.
For an atom to take part in an electrical current the atom must have either positive (+) or negative charge chroming an atom consist of taking away or adding electrons. These charge atom are known as IONS. IONS is two types. ANION, CATION
ELECTRICITY CURRENT
Electric current is a flow of electrons along the conductor. The path of a current from the generating source along. Varrious conductor and back to the source is called- ELECTRIC CIRCUIT .
CUNDUCTORS
A substance which allow a free passage of electrical current are called- CONDUCTORS.
INSULATERS
A substance which dose not allow electric current to pass through them are called- INSULATER.
POLARITY
It is the property of having either a negative or positive charge.
FREQUENCY
The number of cycle occurring in a second is call frequency of the current.
HEARTZ
It is the unit to measure frequency a DIRECT CURRENT.
DIRECT CURRENT
It is the current in which the flow of electrons is in one direction only either positive or negative polarity.
ALTERNATING CURRENT
Is the current that charges polarity in a series of cycle and reaches peaks in a wave from called ALTERNATION alternating current comes from the mains out let (220-240).
GALVANIC CURRENT
A constant direct current of either polarity which is used to product a chemical reaction of the skin used in electrolysis (permanent hair removal) galvanic machine lontop horace and Disincrustation .
A HIGH FREQUENCY CURRENT
In this an alternating current is modified so that frequency is so rapid that its oscillation create local heat for a current to be called high frequency there must be a minimum of 500000 cycle pre second.
FARADIC TYPE CURRENT
It is an interrupted surging direct current that dose not alternate polarities. It can called MONO- PHASIC. It is used it gives an uneven pull on muscles where it is applied. It is used by physiotherapists. The faradic current that alternate in polarities is called BI- PHASIC. This is used by beauty therapists as it is comfortable for clients.
ELECTRICAL UNIT
These units are all interconnected, and understanding them is essential for working with electricity.
AMPIRE
Measurement of electrical strength of the electrical circuit refers of the reading on the meter.
THE OHM
Measurement of electrical resistance, the resistance is determine by the length, dimeters and the meter of the conductors.
THE VOLT
Measurement of the electrical pressure or the electrimative force on the push. The voltage of normal domestic supplied in 220-240 volts.
THE WATT
Measurement of the power out put of an electrical machine. It is expressed as the total amount of the electrical energy of power.
ELECTRICAL DEVICE
A device that produces electricity, they can be contrasted with traditional machine device.
THE RHEASTAT
An electrical device used to control the strength of the current by wiring the resistance of the electrical flow in the circuit. It automatically cuts of the power when reaches the desired heat. example – In geysers, iron, (press) etc.
THE TRANSFORMERS
An electrical device used to step up or step down the electrical voltage, example- transformer is old fridge.
A CAPACITOR OR CONDENSER
An electrical device used to store electricity in a circuit i. e to speed up on electrical current.
A RECTIFIER
An electrical device that changes alternative current to direct current .It allows the flow of electrons in one direction only thus in galvanic machine rectifier is there to change the AC to DC.
