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its because it only allows current to passy through one direction. They are like diodes

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13y ago

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Related Questions

What is the purpose of the Unijunction Transistor?

A Unijunction Transistor is a transistor that acts solely as a switch.


How transistor acts as a amplifier?

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


Which semiconductor acts like a diode and two resistors?

uni junction transistor


How is a transistor used as a switch?

A transistor (bipolar junction transistor BJT) will only conduct in ONE DIRECTION. And the voltage drop is not Ohmic - it is *NOT* strictly related to current flow. If you're referring to a Field-Effect Transitor (JFET, IGFET, MOSFET, etc), then the device may be able to be used in a bidirectional circuit. But the question stated "transistor", which is understood to be a BJT.


How a transistor use as a switch?

A transistor (bipolar junction transistor BJT) will only conduct in ONE DIRECTION. And the voltage drop is not Ohmic - it is *NOT* strictly related to current flow. If you're referring to a Field-Effect Transitor (JFET, IGFET, MOSFET, etc), then the device may be able to be used in a bidirectional circuit. But the question stated "transistor", which is understood to be a BJT.


Can a transistor can act like resistor capacitor inductor?

A transistor acts like a resistor when Gate is connected to Source.


Does a transistor in cut-off region acts as an open switch?

No


What is transistor as a switch?

transistor is a nonlinear device. it will acts as a swicth based on the cut in voltage we can easily identifying the the transistor is in forward or reverse bias.in forward it is 'on' reverse bias 'off'.


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.


When operated in cut off and saturation mode the transistor acts like what?

switch


Can be a distribution transformer be bidirectional?

Transformers are inherently bidirectional.


Are relays unidirectional or bidirectional devices?

Relays are bidirectional devices.