What is transistor?

Question

Why do people use transistor for switching while they could simply use a normal switch? and Why resistors are needed in transistor operation?

Answer 1

there are two types, metal oxide field effect transistor (MOSFET) and bipolar junction transistor (BJT). most digital application use MOSFET (the out put is either 1 or 0), while an analog application use BJT (such as the radio).

the most popular application of transistor is automatic switch. thus, you dont have to use your hand to control the switch. duh? if we are talking about transistor, we are not talking about a light switch, we talking about computer chip here. especially MOSFET. for example, your comp processor is made of a lots lots of transistorsssss. which is actually work as a switchesssss. that is why we did not use a normal switchesssss.

however, we can also use them in a cheap things such as, the normal light. but to think about it, its better to use the normal switch unless you want an automatic light.

the resistor can be any types of resistive/inductive/capacitive circuit which depends on the characteristic of the circuit that you want. for example, you can use a light sensing resistor to make the circuit characteristic change depending on the intensity of light. for example, most of the road lights using it.

conclusion: transistor is very very very important

Answer 2

no longer in basic terms are the different solutions fantastic, one needed component has been disregarded, going to a greater valuable transistor is going to get you no the place, different than per probability to a burned out potential grant, or worse. EP because of the fact that's obvious which you haven't any longer have been given the abilities mandatory. stay with what you have. To effectively use a greater valuable output transistor, of the BJT kind, forget approximately the MOSFET, you need to extend the stress from the winning drivers, boost the potential grant, be specific that the output circuitry will cope with the hot load without changing output impedance, and that the warmth sink is rated for the hot load. One a probability answer for the motive force point is to apply Darlington pair style output transistor. at an identical time as this seems after the motive force matters, it does no longer something for the potential grant, output impedance matters, nor the heatsink. If those issues are no longer scaled appropriate, or changed as mandatory, you're able to finally end up with a small scale version of the Hiroshima mushroom cloud, yet without the radiation. save what you have, and pass purchase a clean amp.

Answer 3

A transistor is a semiconductor device that uses a small amount of voltage or electrical current to control a larger change in voltage or current. Because of its fast response and accuracy, it may be used in a wide variety of applications, including amplification, switching, voltage stabilization, signal modulation, and as an oscillator. The transistor is the fundamental building block of both digital and analog circuits — the circuitry that governs the operation of computers, cellular phones, and all other modern electronics. Transistors may be packaged individually or as part of an integrated circuit chip, which may hold thousands of transistors in a very small area.

Answer 4

If you mean by a normal switch a mechanical switch, then there is a limit as to how fast it can operate. Even very small reed relays can only switch at a few hundred Hz at most. Transistors can switch at MHz or even GHz frequencies.

To learn more about transistors see http://en.wikipedia.org/wiki/Transistor

Answer 5

Consider them a micro switch, meaning really small, consider this , the latest micro processors,aka duo core have transistors so small that 100 could fit into one human cell, if they had a normal sized switch ,our computors would be the size of a baseball field, and that would be a small one.the resistors are to drop the voltage/ heat to the transistor, as thier small size could not handle the true amperage of the circuit that they are switching

Answer 6

A component to rising the electricity.

Answer 7

www.wikipedia.com