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What uses a npn transistor?
NPN transistors are mainly used in switching applications. Used in amplifying circuit applications. Used in the Darlington pair circuits to amplify weak signals. NPN transistors are used in the applications where there is a need to sink a current.
Where are transistors used in everyday life?
Transistors are used in our day to day lives in many forms which we are aware of as amplifiers and switching apparatus. As amplifiers, they are being used in various oscillators, modulators, detectors and nearly in any circuit in order to perform a function. In a digital circuit, transistors are used as switches.
Which is true for npn transistor?
Which of the following is true for a npn transistor in the saturation region? Explanation: The commonly used npn transistors have a potential difference of around 0.5V between he collector and the base. Explanation: The value of Vcb is -0.5V for a pnp transistor and 0.5V for an npn transistor.
What is an example of a transistor?
The definition of a transistor is an electronic device that works by controlling the flow of the electrical current. An example of a transistor is something combined in large numbers with microcircuits into a single circuit board and used in a computer.
Why NPN transistor is used more than PNP?
The majority charge carriers in an NPN transistor are electrons and the majority carriers in a PNP transistor are holes. The electrons have better mobility than holes. Therefore, NPN transistors are preferred over PNP transistors.
What devices use transistors?
Transistors are also found in pacemakers, hearing aids, cameras, calculators, and watches. Most of these devices draw their power from tiny batteries. Most spacecraft also rely on microchips, and thus transistors.
What are two types of transistors?
A transistor is a semiconductor device used to amplify or switch electronic signals. Transistors are broadly divided into three types: bipolar transistors (bipolar junction transistors: BJTs), field-effect transistors (FETs), and insulated-gate bipolar transistors (IGBTs).
What is the working principle of a NPN transistor?
(Symbol & Working Principle) An NPN transistor is the most commonly used bipolar junction transistor, and is constructed by sandwiching a P-type semiconductor between two N-type semiconductors. An NPN transistor has three terminals- a collector, emitter and base. The NPN transistor behaves like two PN junctions diodes connected back to back.
Why is NPN transistor prefered over PNP?
When the transistors are used in electronic circuits for switching purpose, then the NPN transistor is more preferable than the PNP transistor because the switching speed of the NPN transistor is greater than the PNP transistor .
Why is NPN transistor commonly used?
Generally the NPN transistor is the most used type of bipolar transistors because the mobility of electrons is higher than the mobility of holes. The NPN transistor has three terminals – emitter, base and collector. The NPN transistor is mostly used for amplifying and switching the signals .
When is a NPN transistor used as an amplifier?
NPN transistors are used in the applications where there is a need to sink a current . Used in some classic amplifier circuits, such as ‘push-pull’ amplifier circuits. In temperature sensors.