Resistive resistor is a non active electrical component to generate resistance in the electrical current flow. In most electrical networks and circuits they are very much present. The resistance obtained is measured in Ohms. An ohm is basically the resistance which happens when a direct current of one ohm passes through a resistor having a one volt drop across the terminals of the resistor. A two Ohm or greater resistor will reduce the currents.
There are two types of resistors that are available in the market, which are surface mount and plate mount. In the surface mount type, the metal traces of the resistor are soldered to the surface of the circuit board through a soldering guide. This type resistors are available in different sizes and resistivity values as per the requirement of the circuit.
Plate resistance is used in small electrical circuits. In this case, the resistivity value is directly related with the weight of the circuit. It is available in low, medium and high limit applications. There are several advantages of using this type of resistor in comparison with resistors in the other categories. The plate resistance is connected to the external voltage source.
The advantage of using this electrical component is that the device can get power from the source at any time without interrupting the working. Also the voltage across the resistor is fixed and remains same. This makes it easy for controlling the working load in the circuit. One should always select the resistor based on its resistance value. Generally the lower the resistivity, the larger is the current carried by the resistor.
Some important characteristics of resistors are length, maximum voltage, resistance to electrical field changes, and Ohm’s law. Resistance is measured in Ohms. The resistance decreases as the current increases. Therefore, one should always choose a resistor whose value is proportional to the voltage across it. Also one should make sure that the resistor does not become hot while it is in use.
To maintain the resistance value tolerance, it is better to use a multi-conductor one. This means that there are more than one conductor in the resistor which allows cooling. However, this is not applicable in all the situations. So one should first check whether the electrical current produced exceeds the limits set and then one should opt for a high-resistance resistor which provides adequate protection against fluctuations in electrical current.