Home
Class 12
PHYSICS
An amplifier has a voltage gain A(V)=100...

An amplifier has a voltage gain `A_(V)=1000`. The voltage gain in `dB` is

A

30 dB

B

60 dB

C

3 dB

D

20 dB

Text Solution

Verified by Experts

The correct Answer is:
B

Voltage gain in `DB=20log_(10)A_(V)`
`=20log_(10)(1000)=20xx3=60dB`
Promotional Banner

Topper's Solved these Questions

  • ELECTRONIC DEVICES

    MTG GUIDE|Exercise CHECK YOUR BEET VITALS|25 Videos
  • ELECTRONIC DEVICES

    MTG GUIDE|Exercise AIPMT/NEET (MCQs)|42 Videos
  • ELECTRONIC DEVICES

    MTG GUIDE|Exercise AIPMT/NEET (MCQs)|42 Videos
  • ELECTROMAGNETIC WAVES

    MTG GUIDE|Exercise AIPMT/NEET(MCQs)|15 Videos
  • ELECTROSTATICS

    MTG GUIDE|Exercise AIPMT/NEET (MCQ.s)|34 Videos

Similar Questions

Explore conceptually related problems

An amplifier has a voltage gain of 100. The voltage gain in dB is

Two amplifiers are connected one after the other in series. The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20. If the input signal is 0.012 volt then output signal (in V)?

Two amplifiers are connected one after the other in series (cascaded). The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20 . If the input signal is 0.01 V , calcualte the output AC signal .

The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be :-

Three amplifier circuit are connected in series. The voltage gain of each is 5. What is the final voltage amplification?

The voltage gain of an amplifier with 9% negative feedback is 10 . The voltage gain without feedback will be

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

Three amplifiers each having voltage gain 10, are connected in series. The resultant gain would be

MTG GUIDE-ELECTRONIC DEVICES-NEET CAFÉ (TOPICWISE PRACTICE QUESTIONS)
  1. Two amplifiers are connected one after the other in series (cascaded)....

    Text Solution

    |

  2. The input resistance of a common emitter transistor amplifier, if the ...

    Text Solution

    |

  3. An amplifier has a voltage gain A(V)=1000. The voltage gain in dB is

    Text Solution

    |

  4. An n-p-n transistor having a.c. current gain of 50 to be used to make ...

    Text Solution

    |

  5. In a common emitter transistor amplifier, the output resistance is 500...

    Text Solution

    |

  6. A transistor oscillator is (i) An amplifier with positive feedback ...

    Text Solution

    |

  7. For a common emitter amplifier, the audio frequency voltage across the...

    Text Solution

    |

  8. If beta, RL and r are the ac current gain, load resistance and the inp...

    Text Solution

    |

  9. The transfer characteristics of a base biased common in the figure. Wh...

    Text Solution

    |

  10. The transfer characteristics of a base biased transistor has the opera...

    Text Solution

    |

  11. To get an OR gate from a NAND gate we need

    Text Solution

    |

  12. In the following circuit, Y is

    Text Solution

    |

  13. The Booleam expression for the given circuit is

    Text Solution

    |

  14. In Boolean expression, a gate may be expressed as Y=bar(A+B). Which on...

    Text Solution

    |

  15. Which of the following gates (figure) will have an output of 1 ?

    Text Solution

    |

  16. The combination of the gates as shown in figure represent

    Text Solution

    |

  17. The real time variation of input signals A and B are as shown below. I...

    Text Solution

    |

  18. Identify the logic operation performed by the circuit as shown in the ...

    Text Solution

    |

  19. In the circuit below, A and B represent two inputs and C represents th...

    Text Solution

    |

  20. In the Boolean algebra, what is the equivalent expression for barA.bar...

    Text Solution

    |