English

In a common-base connection, the emitter current is 6.28 mA and the collector current is 6.20 mA. Determine the common-base DC current gain.

Advertisements
Advertisements

Question

In a common-base connection, the emitter current is 6.28 mA and the collector current is 6.20 mA. Determine the common-base DC current gain.

Numerical
Advertisements

Solution

Data: The emitter current is IE = 6.28 mA.

The collector current is IC = 6.20 mA

`alpha_(dc) = I_C/I_E` 

⇒ `alpha = 6.20/6.28`

⇒ `alpha = 0.987`

The common base DC current gain is 0.987.

shaalaa.com
  Is there an error in this question or solution?
Chapter 16: Semiconductor Devices - Exercises [Page 364]

APPEARS IN

Balbharati Physics [English] Standard 12 Maharashtra State Board
Chapter 16 Semiconductor Devices
Exercises | Q 20 | Page 364

RELATED QUESTIONS

In a BJT, the largest current flow occurs ______.


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


Derive the relation between α and β.


Which method of biasing is used for operating a transistor as an amplifier?


Draw the circuit symbol of the PNP transistor. 


Explain the working of the PNP transistor? 


Draw the circuit symbol for NPN and PNP transistors. What is the difference in the Emitter, Base, and Collector regions of a transistor? 


What is rectification?


Describe the function of a transistor as an amplifier with the neat circuit diagram. Sketch the input and output wave forms.


Assuming VCEsat = 0.2 V and β = 50, find the minimum base current (IB) required to drive the transistor given in the figure to saturation.


In a common emitter amplifier, the input resistance is 1000 Ω, the peak value of Input signal voltage is 5 mV, and β = 60. The peak value of output current is


The condition to convert an amplified signal into an oscillating signal is ______


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


In the symbol for a transistor, the arrow head points in the direction of the ____________. 


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 ______.


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 ____________.


In transistor amplifier, base-emitter junction is forward biased and collector emitter junction is reverse biased. The current gain is ______.


In the case of transistor, the relation between current ratios αdc and βdc is ______.


A transistor having α = 0.8 is connected in a common emitter configuration. When the base current changes by 6 mA, the change in collector current is ______ 


For a transistor,  αdc and βdc are the current ratios, then the value of `(beta_"dc"-delta_"dc")/(alpha_"dc".beta_"dc")` 


In a p-n-p transistor circuit, the collector current is 10 mA. If 90% of the holes emitted from the emitter reach the collector, ______.


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


Define peak value of alternating signal.


Explain the output characteristics of common emitter configuration of n-p-n transistor.


Define α.


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×