English

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

Advertisements
Advertisements

Question

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

One Line Answer
Short/Brief Note
Advertisements

Solution 1

For use as an amplifier, the transistor should be inactive mode. Therefore, the emitter-base junction is forward biased and the collector-base junction is reverse biased. Also, an amplifier uses an emitter bias rather than a base bias.

shaalaa.com

Solution 2

For transistor operating as an amplifier, the emitter-base junction is forward biased while the collector-base junction is reverse biased. 

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 16 | Page 364
SCERT Maharashtra Physics [English] Standard 12 Maharashtra State Board
Chapter 16 Semiconductors Devices
Very Short Answer | Q 4

RELATED QUESTIONS

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


Derive the relation between α and β.


For a transistor β =75 and IE = 7.5 mA. The value of α is ______ 


Explain the working of the PNP 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. 


The principle based on which a solar cell operates is ____________.


Explain the current flow in an NPN transistor.


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


What is rectification?


Sketch the static characteristics of a common emitter transistor and bring out the essential features of input and output characteristics.


Transistor functions as a switch. Explain.


In the circuit shown in the figure, the BJT has a current gain (β) of 50. For an emitter-base voltage VEB = 600 mV, calculate the emitter-collector voltage VEC (in volts).


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


In switching circuit, transistor is in ON state. Values of Iand IB are 5.2 mA and 10 µA respectively and value of RC is 1 k`Omega`. If Vcc is at 5.5 V, then VCE is ______.


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 an npn transistor, the base current is 100 µA and the collector current is 10 mA. The emitter current is ______.


ln switching circuit, transistor is in ON state and values of IC and IB are 4.2 mA and 5 µA respectively and RC= l k`Omega` and RB= 300 k`Omega`. If VBE = 0.5 V, find the value of VBB.


In switching circuit, transistor is in ON state, values of IE and lB are 10 mA and 0.8 mA respectively and RL is 2 k`Omega`. If VCE is 7.6 V, then VCC is ____________.


In case of npn transistors, the collector current is always less than the emitter current because ______.


For a common emitter configuration, if 'α' and 'β' have their usual meanings, the correct relationship between 'α' and 'β' is ______.


In common emitter mode of transistor, the d.c. current gain is 20, the emitter current is 7 mA. The collector current is ______.


In a study of transistor as an amplifier, the ratio of collector current to emitter current is 0.98. The collector current is 3mA, then base current will be approximately ______.


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 ______.


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


Define β


For a common emitter transistor configuration the ratio of `I_c/I_E` = 0.96, then the current gain in this configuration is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×