Home
Class 12
PHYSICS
When n-p-n transistor is used as an ampl...

When `n-p-n` transistor is used as an amplifier :

A

holes move from emitter to base

B

holes move from base to emitter

C

electrons move from base to collector

D

electrons move from collector to base

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ROTATIONAL MOTION

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 3|8 Videos

  • STATIONARY WAVES

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP-8|20 Videos

Similar Questions

Explore conceptually related problems

When an n-p-n transistor is used as an amplifier, then

With the help of a labelled circuit diagram, explain how an n-p-n transistor can be used as an amplifier in common-emitter configuration. Explain how the input and output voltages are out of phase by 1800 for a common-emitter transistor amplifier.

When NPN transistor is used as an amplifier

In an n-p-n transistor

Passage I An n-p-n transistor is used as a voltage amplifier in a commoin emitter circuit given V_(CC)=8V I_(C )=4mA V_(CE)=4V, (V_(BE)=0.6 V, V_(BB)=8V beta_(Dc)=200 The value of load resistqacne is

To use a transistor as an amplifier

A p-n-p transistor is used as common base amplifier as V_(eb) =3V . When its emitter current changes from 13.4 mA to 20.14 mA its collector current changes from 13.4 mA to 19.9 mA. Its current gain will be

MARVEL PUBLICATION-SEMICONDUCTORS -MCQs
  1. In the circuit, Fig The current through the zener diode is

    Text Solution

    |

  2. In the study of transistor as an amplifier , alpha=lC/lE and beta=IC/I...

    Text Solution

    |

  3. When n-p-n transistor is used as an amplifier :

    Text Solution

    |

  4. For a transistor circuit in common emitter configuration, the voltage ...

    Text Solution

    |

  5. If for a transistor, beta = 49, then the value of alpha is

    Text Solution

    |

  6. If alpha= 60/61 for a transistor, the value of beta is

    Text Solution

    |

  7. In an n-p-n transistor, the collector current is 10 mA. If 90% of the ...

    Text Solution

    |

  8. In a silicon transistor, a change of 7.89 mA in the emitter current pr...

    Text Solution

    |

  9. The transfer ration of a transistor is 50. The input resistance of th...

    Text Solution

    |

  10. What is the voltage gain in a common emitter amplifier when the input...

    Text Solution

    |

  11. A transistor connected in CE mode , has a current gain of 50. If the l...

    Text Solution

    |

  12. Three energy levels L1,L2 and L3 of a hydrogen atom correspond to incr...

    Text Solution

    |

  13. In a n-p-n transister circuit the collector current is 9 mA. If 90% of...

    Text Solution

    |

  14. For a transistor, beta = 50. To change the collector current by 350 mu...

    Text Solution

    |

  15. The current gain in the CE mode of a transistor is 10. If the input im...

    Text Solution

    |

  16. When a transistor is operated in the active region, it cannot be used

    Text Solution

    |

  17. For a transistor 1/alpha -1/beta is equal to

    Text Solution

    |

  18. What is the current gain for a transistor used as a common emitter amp...

    Text Solution

    |

  19. The difference in the working of a step up transformer and an amplifie...

    Text Solution

    |

  20. In an oscillator, for sustained oscillations, Barkhausen criterion is ...

    Text Solution

    |