Home
Class 12
PHYSICS
If for a transistor, beta = 49, then the...

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

A

1

B

0.49

C

0.98

D

15

Text Solution

Verified by Experts

The correct Answer is:
C
`beta=alpha/(1-alpha) " " therefore 49=alpha/(1-alpha)`
`49=50 alpha " " therefore alpha = 49/50` = 0.98
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

For a transistor if beta =100 then alpha will be

The value of beta of a transistor is 19. The value of alpha will be

If 3sin alpha = sin beta!=0 , then the value of |(tan((alpha + beta)/2))/(tan((alpha-beta)/2))|

If 5tan alpha tan beta=3 , then find the value of (cos(alpha+beta))/(cos(alpha-beta))

If 3sin alpha-sin beta ne 0, then the value of |(tan((alpha+beta)/(2)))/(tan((alpha-beta)/(2)))|

For a transistor the value of alpha is 0.9 . beta value is

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

If cos(alpha+beta)+sin(alpha-beta)=0 and tan beta ne1 , then find the value of tan alpha .

MARVEL PUBLICATION-SEMICONDUCTORS -MCQs
  1. When n-p-n transistor is used as an amplifier :

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  19. To obtain the current gain (beta) of a transistor, when it is in CE mo...

    Text Solution

    |

  20. The r.m.s. value of the base current ofa transistor is 10muA. What is ...

    Text Solution

    |