Resistance:
What is Electrical Resistance?
When electrons flow through a bulb or another conductor, the conductor does offers some obstruction to the current. This obstruction is called electrical resistance.
•The longer the conductor higher the resistance.
•The smaller its area the higher its resistance.
•The smaller its area the higher its resistance.
Every material has an electrical resistance and it is the reason that the conductor give out heat when the current passes through it.
Reading Resistor Values:
The resistance of resistors is indicated using colour-coded bands on the body of the resistor. The first three colour bands indicate the value of the resistor in Ohms. The first band tells us the first digit, the second band tell us the second digit and the third band tell us the number of zeros.
Examples:
If the first band is green (5) the second digit is blue (6) and the third band is orange (3), the value of the resistor is 56000 ohm. Because 1000 Ohm = 1 K, we have 56k
No comments:
Post a Comment