Different types of resistors
Fusible restores perform double jobs means they limit the current as well as it can be used as a fuse. The type of resistor determines the importance of each component.
Carbon Resistors The resistive material in these resistors is made of carbon or graphite dust. What if we connected a resistor?
Uses of resistor
The resistor is coated with an insulating material to protect the conducting material from the surrounding environment and vice versa. These resistors are used rarely because of moving part and uncertainty. Alternatively, the statement means that the current and voltage ratio remains constant and is called resistance. This is a model of how a resistor actually behaves in a circuit. Through hole resistors , along with the resistance, are rated according to the power they dissipate. On the other end of the scale you can find resistors that dissipate a massive W. These resistors consist of fixed value of resistance between two terminals and are mostly used for setting the sensitivity of sensors and voltage division. Adjustable Resistors There are many different types of adjustable resistors. Rather than using a carbon film, this resistor type uses a metal oxide film deposited on a ceramic rod.
It has a high tolerance. Moreover, Wire wound resistors are generally used in high power rating devices and equipments, Testing and measuring devices, industries, and control equipments. Some of these are described below.
Construction of Tapped Rheostat Variable wire wound resistors are available in the range of 1 ohm up to Ohms. When the middle tab is used along with the other tab, it becomes a rheostat or variable resistor.
Types of variable resistors
Both are variable resistors. The properties like reliability, accuracy and stability are considerably better for these resistors. There are two conductor wires on the both ends of the resistor for easy connectivity in the circuit via soldering. When voltage increases due to lighting or line faults across a connected sensitive device or system, then it reduces the level of voltage to a secure level i. An LDR for example are special resistors whose resistance varies with the amount of light that falls on them. When electrons flow through the wire, some of them pass right through the gaps in the wire, but some of them hit an atom and bounce back, sometimes electrons themselves collide. A potentiometer or pot acts as a variable voltage divider by moving a wiper across the surface of a fixed-resistance element. Since carbon compounds burn easily, these resistors can handle only low amounts of dissipated powers. Carbon composition resistors are formed by mixing carbon granules with a binder which was then made into a small rod. Following are the further types of Variable Resistors Potentiometers Trimmers Potentiometers Potentiometer is a three terminal device which is used for controlling the level of voltage in the circuit. The properties of these different resistors vary, and it helps to obtain the right type of resistor for any given design to ensure that the best performance is obtained. Some of these are described below. Resistance is analogous to friction.
based on 86 review