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A: The small base current will control the collector current flow by adding a resistor this changes of current flow will be evident as a voltage amplifier.

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Q: How does a transistor function as an amplifier?
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Related questions

How transistor acts as a amplifier?

A transistor does not act as an amplifier. It is used as a component in an amplifier circuit.


Can a transistor alone perform the function of an amplifier?

No, it needs several other components and a source of power.


When a PNP transistor is connected in a circuit it can be used as a power amplifier because?

A PNP transistor has no advantage or disadvantage over an NPN transistor in its ability as an amplifier. Rather, the current-handling capacities of the transistor determine if it's usable as an amplifier.


What is the function of resistor in single stage amplifier?

A simple, 1 transistor single stage amplifier can be made using several resistors to bias a NPN or PNP transistor into its' linear operating region. With this done, a small voltage signal applied to the input of the amplifier will have the voltage amplified at the output in a linear fashion. I'm not sure what your question is; if this does not answer it let me know.


When transistor acts as an amplifier then does its output voltage increase or decrease?

That depends on both the input signal and the type of amplifier the transistor is used in.


Why does a CE amplifier have a high gain?

GAIN is a function of load current but basically a small current in the base will make a big change of collector current therefore making a transistor a voltage amplifier as opposed to a current amplifier


What component is typically used as an amplifier?

A transistor


Why the gain of pnp transistor is low?

it doesn't have to be. depends on design of amplifier using transistor.


What configuration commonly employed in bipolar transistor amplifier?

Common Emitter - Class A Amplifier.


Difference between cascode and cascade amplifier?

cascade: the output of one amplifier stage is connected to the input of another amplifier stages, it's also connected in series. cascode: it said to be cascode, when it has one transistor on the top of another where a common emitter transistor drives a common base transistor.


Why a transistor is used as a amplifier and switch?

transistor has 2 output 1 and 0 so can be used as a switch


How does using a transistor with a different β affect the operation of the common emitter amplifier?

the amplification factor is a function of β. Higher β causes a higher amplification.