HOW TO REPAIR AND SERVICE YOUR ELECTRONIC GADGETS PART 2

RESISTORS
Before you can be able to repair or service your electronic equipment, you need to know the components use for manufacturing the products. I am going to explain to you what Resistor is and its uses.
Electronic equipment cannot work without resistor, resistor is a material in electronics, with which the flow of current is controlled through its opposition properties. A resistor may be made of carbon within it, or of resistive wire such as is found in pressing iron and water heaters, electronic kettles. Like in everything else, resistors are of different values, identifiable by what is known as their “color –code”. The Ohm is the unit of measurement or simple the naming of the naming of the values. For example, a 100-ohm resistor will oppose the flow of current in a torch light circuit more than a 10-ohm resistor, thus causing the light to be dimmer on the bulb. This means: The higher the resistance (in ohms), the higher the opposition to the flow of electric current. This means less power behind them for the cut down on what comes in.
In some circuits, very high resistors are specially needed for special purpose, such as getting just the little current we need to operate something requiring little power. If there is no other way of supplying that particularly little amount of current than by a resistor, then it has to be.
There are fixed resistors and there are variable ones. The variable resistors are usually employed as volume controls in radio, television and practically in any electronic equipment. Variable resistance means variable current in the circuit, meaning variable sound-level or vision level etc.
THE RESISTOR COLOUR CODE
Brown = 1
Red = 2
Orange= 3
Yellow = 4
Green = 5
Blue = 6
Violet = 7
Grey = 8
White = 9
Black = 0
Let us now read the value of the above resistor: Brown in the first position is = 1, Red in the second position is = 2, ordinarily as in the first. Brown in the third and (last) position means One zero. Overall, we have: 120 ohms. If red was in the third position, it would be 2 zeros. Thus, black in the third position means no zero after the first two numbers.