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Resistor

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Resistors are truly ubiquitous. The only passive component in electronic circuits that dissipate energy is Resistor. Resistor:  It is a passive electronic component. What it does is it obstructs the current passing through it.  A resistor is just like a wall. Based on the resistance value, it allows some portion of current/large currents through it. The property of obstruction/ opposing the flow of electrons is called Resistivity and the amount of opposing can be judged by parameter Resistance. And it’s units are Ohms (Ω). It is represented by letter ‘R’. Below is the circuit symbol of resistance. Resistors can also be defined as “Component that has Electric Friction”. Resistors are temperature dependent i.e., few resistors’ resistance value varies with a change in temperature. Resistors can be subclassified as shown below: Carbon and Wirewound resistors have their resistance values fixed. Whereas Potentiometers and Rheostats can be varied for a higher range of resistance...
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Introduction to Electronics

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Electronics seems to be difficult to understand. Upon summarizing the whole history of electronics, here is how it looks:  The word “Electronics” stands for “Electro-mechanics”. In simple words, the study of the motion of electrons under the influence of electric/magnetic field is what electronics is all about. Electronics has come into the picture from 1897 where vacuum tubes were used for electron movement and functioning by J.A. Fleming. Later on, Vacuum diodes, triodes came into the picture. The major breakthrough though occurred in Bell laboratory in the year 1948 with the invention of Transistor by combined work of John Bardeen, Walter Brattain, and William Shockley. Further, the evolution of modern electronic technology has been based on the process of micro-miniaturization which in-turn means the reduction in the size of components which led to the advancement of new Integrated circuit technology. This gave birth to SSI, MSI, LSI, and VLSI and still the process is going on ...
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