Basically, all materials have resistive properties but some materials such as copper, silver, gold and metal materials generally have very little resistance. These materials deliver the electrical current very well, so-called conductors. The opposite of a conductive material, materials such as rubber, glass, carbon has a greater resistance restrain the flow of electrons and are called insulators.Resistor is the basic electronic components used to limit the amount of current flowing in one circuit. As the name implies is a resistive resistor and generally made of carbon materials. From Ohms law is known, the resistance is inversely proportional to the amount of current flowing through it. Unit resistance of a resistor is called Ohm or represented by the symbol W (Omega).
Resistor physical
Other specifications that need to be considered in choosing a design resitor the resistance is greater than big watts his. Because resistors working with electrified, there will be a power dissipation of heat for W = I2R watts. The greater the physical size of a resistor can demonstrate the greater ability of the resistor power dissipation.
Generally in the market available sizes 1 / 8, 1 / 4, 1, 2, 5, 10 and 20 watts. Resistor which has a power dissipation of 5, 10 and 20 watts generally cubic-shaped elongated white square, but there is also a cylindrical. But usually for this jumbo-sized resistor resistance value printed directly on the body, for example 100W5W.
Rumus mengitung nilai resistor seri|paralel
Resistor paralel
Series of resistors in parallel will result in a replacement value of the smaller resistance. Below is an example of resistors that are arranged in parallel.
In parallel resistor circuit applies the formula:
Series of resistors in series will result in the total resistance value is growing. In Below are examples of resistors arranged in series.
Series resistor in the circuit applies the formula:
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