हिंदी

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?

एक पंक्ति में उत्तर
टिप्पणी लिखिए
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
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 16: Semiconductor Devices - Exercises [पृष्ठ ३६४]

APPEARS IN

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

संबंधित प्रश्न

In a BJT, the largest current flow occurs ______.


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


In a common-base connection, a certain transistor has an emitter current of 10mA and a collector current of 9.8 mA. Calculate the value of the base current.


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


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


The light emitted in an LED is due to


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


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).


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


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


Least doped region in a transistor ____________.


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 ______.


If `alpha`-current gain of a transistor is 0.98. What is the value of `beta`- current gain of the transistor?


In an npn transistor, the collector current is 24 mA. If 80% of electrons reach collector, its base current in mA 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 ____________.


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 a transistor, the thickness of the base region ____________.


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 ______.


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 reverse bias in a junction diode is changed from 8V to 13V, then the value of the current changes from 40μA to 60μA. The resistance of junction diode will be ______.


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?

 


The transfer ratio of a transistor is 50. The input resistance of the transistor when used in the CE configuration is 1K Ω. The peak value for an AC input voltage of 0.01 V of collector current is ______.


Explain the working of the n-p-n transistor in a common base configuration.


How is a transistor biased for operating it as amplifier?


Define peak value of alternating signal.


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


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×