Home
Class 12
PHYSICS
A common emitter amplifier is designed w...

A common emitter amplifier is designed with `NPN` transistor `(alpha=0.99)`. The input impedence is `1k Komega` and load is `10 Komega`. The voltage gain will be

A

`9.9`

B

`99`

C

`990`

D

`9900`

Text Solution

Verified by Experts

The correct Answer is:
C
Voltage gain `=betaxx` Resistance gain
`beta=(alpha)/(1+alpha)=0.99/((1-0.99))=99`
Resistance gain `=(10xx10^(3))/(10^(3))=10`
`implies` Voltage gain `=99xx10=990`
Promotional Banner

Topper's Solved these Questions

  • SEMICONDUCTOR ELECTRONICS

    A2Z|Exercise Digital Electronics|40 Videos

  • SEMICONDUCTOR ELECTRONICS

    A2Z|Exercise Problems Based On Mixed Concepts|32 Videos

  • SEMICONDUCTOR ELECTRONICS

    A2Z|Exercise Diode In Circuits|40 Videos

  • NUCLEAR PHYSICS

    A2Z|Exercise Section D - Chapter End Test|29 Videos

  • SOURCE AND EFFECT OF MAGNETIC FIELD

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

A common emitter amplifier is designed with NPN transistor (alpha = 0.99) . The input impedance is 1 K Omega and load is 10 K Omega . The voltage gain will be

A common-emitter amplifier is designed with an n-p-n transistor (alpha=0.99) .The input impedance is 1kOmega and the load is 10kOmega .The voltage gain will be

A common emitter amplifier is designed with n-p-n transistor (alpha=0.99) . The input resistance is 1K ohm and load is 10 k ohm . The voltage gain will be

A CE amplifier is designed with a transistor having alpha =0.99 . Input impedance is 1 k Omega and load is 10 k Omega . Voltage gain will be :

The current gain in the common emitter mode of a transistor is 10. The input impedance is 20kOmega and load of resistance is 100k Omega . The power gain is

A change of 0.2mA in the base current cause a change of 5mA in the collector current for a common emitter amplifier. (i) Find the a.c. current gain of the transistor (ii) If the input resistance is 2kOmega and its voltage gain is 75. Calculate the load resistance used in the circuit.

A non transistor operates as a common emitter amplifier, with a power gain of 60 dB. The input circuit resistance is 100 Omega and the output load resistance is 10 k Omega . The common emitter current gain beta is:

An npn transistor operates as a common emitter amplifier with a power gain of 10^6 . The input circuit resistance is 100 Omega and the output load resistance is 10 k Omega . The common emitter current gain ' beta ' will be (Round off to the Nearest Integer)

A common emitter amplifier has a voltage gain of 50 , an input impedence of 100 Omega and an output impedence of 200 Omega . The power gain of the of the amplifier is

A2Z-SEMICONDUCTOR ELECTRONICS-Junction Transistor
  1. For a transistor the parameter beta=99. The value of the parameter alp...

    Text Solution

    |

  2. In a PNP transistor the base is the N-region. Its width relative to th...

    Text Solution

    |

  3. A common emitter amplifier is designed with NPN transistor (alpha=0.99...

    Text Solution

    |

  4. The symbol given in figure represents

    Text Solution

    |

  5. An NPN-transistor circuit is arranged as shown in figure. It is

    Text Solution

    |

  6. The part of a transistor which is heavily doped to produce a large num...

    Text Solution

    |

  7. For a transistor the current amplification factor is 0.8. The transist...

    Text Solution

    |

  8. In a common base amplifier circuit, calculate the change in base curre...

    Text Solution

    |

  9. In case of NPN-transistor the collector current is always less than th...

    Text Solution

    |

  10. In a transistor circuit shown here the base current is 35 muA. The val...

    Text Solution

    |

  11. In transistor, a change of 8.0 mA in the emitter current produces a ch...

    Text Solution

    |

  12. In a transistor configuration beta -parameter is

    Text Solution

    |

  13. Which of these is unipolar transistor?

    Text Solution

    |

  14. For a transistor, in a common emitter arragement, the alternating curr...

    Text Solution

    |

  15. The relation between alpha and beta parameters of current gains for a ...

    Text Solution

    |

  16. When npn transistor is used as an amplifler

    Text Solution

    |

  17. In the CB mode of a transistor, when the collector voltage is changed ...

    Text Solution

    |

  18. Which of the following is used to produce radio waves of constant ampl...

    Text Solution

    |

  19. While a collector to emitter voltage is constant in a transistor, the ...

    Text Solution

    |

  20. NPN transistor are prefered to PNP transistor because they have

    Text Solution

    |