Different Types of Resistors

Different Types of Resistors :

Apart from coming in various shapes and sizes, resistors are also classified according to what the active material is made of.

1. Carbon Resistors :

Carbon Film Resistors

The resistive material in these resistors is made of carbon or graphite dust. Since carbon compounds burn easily, these resistors can handle only low amounts of dissipated powers. Also since the material is a powder, they are not very accurate and have loose tolerances.shown

2. Metal Film Resistors :

Metal Film Resistors

Just like their name suggests, the resistive material is a metal film. Since the metal film can be made or calibrated to very specific dimensions, the resistance can be controlled finely and as a result these resistors are very accurate.

3. Wire Wound Resistors :

Wire Wound Resistors

The resistive material is made of a wire. Since these wires can be as thick as one likes, these resistors can be made to handle very high powers and are often wound around a ceramic core as shown.

4. Semiconductor Resistors :

Semiconductor Resistors

These resistors are implemented in silicon and form an integral part of semiconductor ICs.

Comments

what is electric current

Electric Current Definition : Electric current is defined as the rate of flow of negative charges of the conductor. In other words, the continuous flow of electrons in an electric circuit is called an electric current.The conducting material consists a large number of free electrons which move from one atom to the other at random. Unit of Current : Since the charge is measured in coulombs and time in seconds, so the unit of electric current is coulomb/Sec ( C/s ) or amperes ( A ). The amperes is the SI unit of the conductor. The I is the symbolic representation of the current. Current Folw Q= 1 Coulomb; t = 1 Second; then I = 1A Thus, a wire is said to carry a current of one ampere when charge flows through it at the rate of one coulomb per second. When an electrical potential difference is applied across the metallic wire, the loosely attached free electrons start moving towards the positive terminal of the cell shown in the figure below. This continuous flow

Conductance: What is it? (Definition, Units & Formula)

Conductance: What is it? (Definition, Units & Formula) What is Conductance? Conductance (also known as electrical conductance ) is defined as the potential for a substance to conduct electricity Conductance is the measure of how easily electrical current (i.e. flow of charge) can pass through a material. Conductance is the inverse (or reciprocal) of electrical resistance, represented as 1/R. To have a better understanding of conductance, one must recall the resistance of an object. In a qualitative sense, the resistance tells us how difficult it is for an electrical current to pass. The resistance between two points can be defined in the quantitative sense as the difference in voltage that is needed to carry a unit current across the two specified points. The resistance of an object is represented as the ratio of the voltage across something to the current passing through it. The resistance is measured in Ohms. The conductance of a component is a determination of how quickly curre

Electronic Hub

Search This Blog