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

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

Advertisements
Advertisements

प्रश्न

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

एका वाक्यात उत्तर
टीपा लिहा
Advertisements

उत्तर १

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

उत्तर २

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

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 16. | पृष्ठ ३६४

संबंधित प्रश्‍न

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


In a common base configuration, the transistor has an emitter current of 10 mA and a collector current of 9.8 mA. The value of base current is ______ 


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? 


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


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


What is rectification?


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.


A transistor has a voltage gain A. If the amount βA of its output is applied to the input of the transistor, then the transistor becomes oscillator, when ______.


Least doped region in a transistor ____________.


In switching circuit, transistor is in ON state. Values of IC and 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 ______.


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 ____________.


Which of the following regions of a transistors are, respectively, heavily dopped and lightly dopped?


In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be: ____________.


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


In an npn transistor circuit, the collector current is 10 mA. If 90% of the electrons emitted reach the collector, the emitter current (IE) and base current (IB) are given by ____________.


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


In a silicon transistor, a change of 7.89 mA in the emitter current if produces a change of 7.8 mA in the collector current, then the base current must change by ____________.


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


A common emitter amplifier has a voltage gain of 50, an input impedance of 100Ω and an output impedance of 2000Ω. The power gain of the amplifier is ______.


A conducting wire has length 'L1' and diameter 'd1'. After stretching the same wire length becomes 'L2' and diameter 'd2' The ratio of resistances before and after stretching is ______.


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


A common emitter amplifier circuit built using an n-p-n transistor is shown in the figure. Its DC current gain is 300, RC = 4 kΩ and VCC = 20 V. What is the minimum base current for VCE to reach saturation?

 


How is a transistor biased for operating it as amplifier?


Define peak value of alternating signal.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×