मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Define α

Advertisements
Advertisements

प्रश्न

Define α.

 Define the current gain αDC for a transistor.

व्याख्या
Advertisements

उत्तर

The dc common-base current ratio or current gain (αdc) is defined as the ratio of the collector current (Ic) to emitter current. (Ig)

`alpha_"dc" = "I"_"C"/"I"_"E"`

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 16: Semiconductor Devices - Exercises [पृष्ठ ३६४]

APPEARS IN

बालभारती Physics [English] Standard 12 Maharashtra State Board
पाठ 16 Semiconductor Devices
Exercises | Q 17 i | पृष्ठ ३६४

संबंधित प्रश्‍न

In a BJT, the largest current flow occurs ______.


Why is the base of a transistor made thin and is lightly doped?


Why are the emitter, the base, and the collector of a BJT doped differently?


The common-base DC current gain of a transistor is 0.967. If the emitter current is 10mA. What is the value of base current?


In a transistor amplifier, IC = 5.5 mA , IE = 5.6 mA. The current amplification factor β is ______ 


Explain the working of the PNP transistor? 


With the help of a neat diagram, explain the working of the npn transistor?  


With the help of a neat circuit diagram, explain the transistor as an amplifier? 


Draw the circuit diagram to study the characteristic of the transistor in common emitter mode. Draw the input and output characteristics. 


Explain the need for a feedback circuit in a transistor oscillator.


For a transistor, the current ratio 'βdc' is defined as the ratio of ______.


Least doped region in a transistor ____________.


Ve, Vb, and Ve are emitter, base, and collector voltage respectively for npn transistor in CE mode. Amplifier works for the combination of biasing voltage equal to ______.


In a transistor in CE configuration, the ratio of power gain to voltage gain is ____________.


A pnp transistor is used in common-emitter mode. If a change of 40 µA in base current brings a change of 2 µA in collector current with 0.04 V in base-emitter voltage, then the input resistance is ____________.


The current gain `alpha` of a transistor is 0.95. The change in collector current corresponding to a change of 0.4 mA in the base current in a common emitter arrangement is ______.


A transistor is connected in C - E mode. If collector current is 72 × 10-5 A and α = 0.96, then base current will be ______.


In common emitter amplifier, a change of 0.2 mA in the base current causes a change of 5 mA in the collector current. If input resistance is 2K `Omega` and voltage gain is 75, the load resistance used in the circuit is ______.


In the common-emitter configuration of a transistor, the current gain is more than 1 because [lb, le, and lc are base, emitter, and collector currents respectively] ______


The collector current in a common-emitter transistor amplifier is 4 mA. When the base current is increased by 20 µA, the collector current increases to 6 mA. The current gain is ______.


How is a transistor biased for operating it as amplifier?


In a CE amplifier, the current gain is 80 and the emitter current is 9 mA. The base current is ______.


When an n-p-n junction transistor is used as an amplifier in common emitter mode, ______.


In a transistor (common emitter configuration) the ratio of power gain to voltage gain is (α and β are current ratios) ______.


In the case of constants ‘α’ and ‘β’ of a transistor ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×