Home
Class 11
PHYSICS
In an n-p-n transistor circuit, the coll...

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

A

the emitter current will be 18 mA

B

emitter current will be 22 mA

C

base current will be 2mA

D

base current will be 1mA

Text Solution

Verified by Experts

The correct Answer is:
B, C
`I_(C)=90%I_(E)rArrI_(E)=(100)/(90)xxI_(C)=(100)/(90)xx20=22mA`
`I_(B)=I_(E)=I_(C)=22-20=2mA`
Promotional Banner

Topper's Solved these Questions

  • SEMICONDUCTORS

    ALLEN |Exercise Part-3(Exercise-3)|27 Videos

  • SEMICONDUCTORS

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

  • SEMICONDUCTORS

    ALLEN |Exercise Part-3(Exercise-1)|84 Videos

  • PHYSICAL WORLD, UNITS AND DIMENSIONS & ERRORS IN MEASUREMENT

    ALLEN |Exercise EXERCISE-IV|7 Videos

  • WAVES AND OSCILLATIONS

    ALLEN |Exercise Part-1(Exercise-05)[B]|42 Videos

Similar Questions

Explore conceptually related problems

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

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?

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.

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 .....

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

An n-p-n transistor in a common emitter mode is used as a simple voltage amplifier with a collector connected to load resistance R_(L) and to the base through a resistance R_(B) . The collector-emmiter voltage V_(CE) = 4V , the base-emitter voltage V_(BE) = 0.6 V , current through collector is 4 mA and the current amplification factor beta = 100 Calculate the value of R_(L) and R_(B) .

A transistor has a current amplification factor (current gain) of 50 , In a CE amplifier circuit, the collector resistance is chosen as 5 k Omega and the input resistance is 1 k Omega Calculate the output voltage if input voltage is 0.01 V.

ALLEN -SEMICONDUCTORS-Part-3(Exercise-2)
  1. An electric field us applied to a semiconductor.Let the number of char...

    Text Solution

    |

  2. Two identical p-n juctions may be connected in series with a battery i...

    Text Solution

    |

  3. In an n-p-n transistor circuit, the collector current is 20 mA. If 90 ...

    Text Solution

    |

  4. In sample of pure silicon 10^(13) "atom"//cm^(3) is mixed of phosphoru...

    Text Solution

    |

  5. Mobility of electron in N-type Ge is 5000 cm^(2)//"volt" sec and condu...

    Text Solution

    |

  6. A diode made forward biased by a two volt battery however there is a d...

    Text Solution

    |

  7. Forbidden energy gap of Ge is 0.75eV, maximum wave length of incident ...

    Text Solution

    |

  8. In the figure, the input is across the terminals A and C and the o...

    Text Solution

    |

  9. An oscillator is nothing but an amplifier with

    Text Solution

    |

  10. In the following common emitter configuration an NPN transistor with c...

    Text Solution

    |

  11. In the given transistor circuit, the base current is 35 muA. The value...

    Text Solution

    |

  12. In the cuircuit shown here the transistor used has a current gain beta...

    Text Solution

    |

  13. Choose the only false statement from the following.

    Text Solution

    |

  14. What will be conductance of pure silicon crystal at 300 K Temp. If ele...

    Text Solution

    |

  15. The output of the given logic gate is 1 when inputs A,B and C are such...

    Text Solution

    |

  16. The arrangement shown in figure performs the logic function of a/an….g...

    Text Solution

    |

  17. You are given two circuits as shown in following figure. The logic ope...

    Text Solution

    |

  18. Which of the following Boolean expression is not correct :-

    Text Solution

    |

  19. Which of the following relation is valid in Boolean algebra :-

    Text Solution

    |

  20. Given below are four logic tage symboles. Those for OR, NOR and NAND a...

    Text Solution

    |