Home
Class 11
PHYSICS
In npn transistor circuit, the collector...

In npn transistor circuit, the collector current us 10 mA. If 95 % of the electrons emitted reach the collector what is the free current ?

Text Solution

Verified by Experts

`I_(c)=95 %,I_(c)=0.95I_(e):. I_(c) = (100)/(95)xxI_(c)=(100)/(95)xx10mA=10.53mA (because I_(c)=10mA)`
Now `I_(e)=I_(c)+I_(b):. I_(b)=I_(a)-I_(c)=10.53-10=0.53mA`
Promotional Banner

Topper's Solved these Questions

  • WAVES AND OSCILLATIONS

    ALLEN |Exercise Part-1(Exercise-01)|53 Videos

  • WAVES AND OSCILLATIONS

    ALLEN |Exercise Part-1(Exercise-02)|19 Videos

  • WAVES AND OSCILLATIONS

    ALLEN |Exercise Part-2(Example)|15 Videos

  • SEMICONDUCTORS

    ALLEN |Exercise Part-3(Exercise-4)|50 Videos

Similar Questions

Explore conceptually related problems

In an n-p-n transistor circuit, the collector current is 20 mA. If 90 % of electron emitted reach the collector :-

In a n-p-n transistor circuit, the collector current is 10 mA. If 95 per cent of the electrons emitted reach the collector, which of the following statements are true?

In an NPN transistor the collector current is 10 mA . If 90% of electrons reach collector, the emitter current (i_(E)) and base current (i_(B)) are given by

In a common base mode of a transition , the collector current is 5.488 mA for an emitter currect of 5.60 mA . The value of the base current amplification factor (beta) will be

Consider an n-p-n transistor amplifer in common-emitter configuration. The current gain of the transistor is 100 . If the collector current changes by 1mA , what will be the change in emitter current?

In an NPN transistor 10^(10) electrons enter the emitter in 10^(-6) s and 2 % electrons recombine with holes in base then current gain alpha and beta are

Statement-I : When base region has larger width, the collector current decreases. Statement-II : In transistor, sum of base current and collector current is equal to emitter current.

For a common emitter amplifier, current gain = 50. If the emitter current is 6.6 mA, calculate the collector and base current. Also current gain. When emitter is working as common base amplifier,

The current of transistor in common emitter mode is 49. The change in collector current and emitter current corresponding to the change in the base current by 5.0 muA m will be :-

The current gain of a common base transistor circuit is 0.96. On changing the emitter current by 10.0 mA, the change in the base current will be .....

ALLEN -WAVES AND OSCILLATIONS-Part-3(Example)
  1. Differentiate zener and avalance breakdown.

    Text Solution

    |

  2. A sinusoidal voltage of amplitude 25 volts and frequency 50 Hz is appl...

    Text Solution

    |

  3. The halfwave rectifier supplies power to be 1 k Omega. The input suppl...

    Text Solution

    |

  4. A fullwave rectifier supplies a load of 1 k Omega. The a.c voltage app...

    Text Solution

    |

  5. A fullwave P.N diode rectifier used load resistor of 1500 Omega. No fi...

    Text Solution

    |

  6. A zener diode of voltage V(Z)(=6 volt) is used to maintain a constant ...

    Text Solution

    |

  7. A Zener diode is specified having a breakdown voltage of 9.1 V with a ...

    Text Solution

    |

  8. In a transistor, the value of beta is 50. Calculate the value of alpha

    Text Solution

    |

  9. Calculate the collector and emitter current for which I(b) = 20 mA, be...

    Text Solution

    |

  10. For a common emitter amplifier, current gain = 50. If the emitter curr...

    Text Solution

    |

  11. Transistor with beta = 75 is connected to common-base configuration. W...

    Text Solution

    |

  12. The base current is 100 muA and collector current is 3 mA (a) Calcul...

    Text Solution

    |

  13. In npn transistor circuit, the collector current us 10 mA. If 95 % of ...

    Text Solution

    |

  14. In an NPN transistor 10^(10) electrons enter the emitter in 10^(-6)s a...

    Text Solution

    |

  15. TV transmission tower at Kota has a height of 80 m. Radius of earth is...

    Text Solution

    |

  16. A ground reciver is receiving a signal at (a) 5 MHz, and (b) 100 MHz, ...

    Text Solution

    |

  17. A separate high freq. wave (i.e. carrier wave) is needed in modulation...

    Text Solution

    |

  18. A message signal of frequency 10kHz and peak voltage of 10"volts" is u...

    Text Solution

    |

  19. The modulation index of an FM carrier having a carrier swing of 200kHz...

    Text Solution

    |

  20. A 100 MHz xarrier wave frequency is modulated by 10 kHz sinusoidal mod...

    Text Solution

    |