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"Types of Resistor and their applications", Useful/Daily…
"Types of Resistor and their applications"
Types of resistor
Carbon Composition Resistor
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A carbon composition resistor (also known as a carbon resistor) is a commonly used resistor. These resistors are low cost and are easy to construct.
Carbon resistors are mainly made of carbon clay composition covered with a plastic case. The lead of the resistor is made of tinned copper.
The main advantages of these resistors are that they are readily available, low cost, and they are very durable.
Metal Film Resistor
The resistor is constructed by means of deposition a thin film of a conductive material such as pure carbon or metal on to an insulating core.
The desired value of resistance of metal film resistor or carbon film resistor can easily be obtained by either trimming the layer of the thickness or by cutting helical grooves of suitable pitch along its length.
Thermistor
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The word thermistor means a thermal resistor. Its resistance value changes with the change in the temperature.
Most thermistors have a negative temperature coefficient which means its resistance will fall down when the temperature increases.
These are normally made of semiconductor materials. Resistance up to a few megaohms can be obtained from thermistors.
They are used to detect small temperature changes, when there is a temperature change, however small, there will be a large change in the value of the resistance.
Light Dependent Resistor
A Light Dependent Resistor (or LDR) will vary in resistance depending on the intensity of light falling on it. This is made of cadmium sulfide which contains a small number of electrons when it is not illuminated.
When a light ray falls on it, electrons get ejected and hence the conductivity of it increases. Hence, it offers low resistance when light falls on it and offers high resistance in the dark.
A resistor is a passive component in a circuit which provides resistance to the flow of current. There are many different types of resistors. These resistors vary in their construction, power dissipation capacities, and tolerance to various parameters (such as temperature and light).
What is resistor in mobile phone?
Useful/Daily applications
Resistors are used in high frequency instrument.
Resistor is used in power control circuit.
It is used in DC power supplies.
Resistors are used in filter circuit networks.
It is used in amplifiers, oscillators, telecommunication and digital multimeter.
It is used in wave generators.
Resistors are used in transmitters, modulators and demodulators.
It is used in medical instrument.
It is used in instrumentation applications.
Resistor is used in voltage regulators.
