Home
Class 12
PHYSICS
A transistor -oscillator using a resonan...

A transistor -oscillator using a resonant circuit with an inductor `L` (of negligible resistance) and a capacitor `C` in series produce oscillations of frequency `f`. If `L` is doubled and `C` is changed to `4C`, the frequency will be

A

f/2

B

f/4

C

8f

D

`f//2sqrt2`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    NARAYNA|Exercise EXERCISE-4|16 Videos

  • ELECTROMAGNETIC INDUCTION

    NARAYNA|Exercise ASSERTION & REASON|6 Videos

  • ELECTROMAGNETIC INDUCTION

    NARAYNA|Exercise EXERCISE-2 (H.W)|16 Videos

  • ELECTRO MAGNETIC WAVES

    NARAYNA|Exercise LEVEL-II(H.W)|14 Videos

  • ELECTROMAGNETIC WAVES

    NARAYNA|Exercise EXERCISE -4|15 Videos

Similar Questions

Explore conceptually related problems

A resistor R , an inductor L and a capacitor C are connected in series to an oscillator of frequency n . If the resonant frequency is n_r, then the current lags behind voltage, when

A resistor R ,an inductor L , and a capacitor C are connected in series to an oscillator of freqency upsilon .if the resonant frequency is upsilon_(r) , then the current lags behind voltage, when:

In a series resonant L–C–R circuit, if L is increased by 25% and C is decreased by 20%, then the resonant frequency will –

A resistor R , an inductor L and a capacitor C are connected in series to a source of frequency n . If the resonant frequency is n_(r) , then the current lags behind voltage when

An oscillator circuit consists of an inductance of 0.5mH and a capacitor of 20muF . The resonant frequency of the circuit is nearly

An oscillator circuit consists of an inductance of 0.5mH and a capacitor of 20muF . The resonant frequency of the circuit is nearly

In series L-C-R resonant circuit, to increase the resonant frequency

NARAYNA-ELECTROMAGNETIC INDUCTION-EXERCISE-3
  1. Two coils of self-inductance 2mH and 8 mH are placed so close togethe...

    Text Solution

    |

  2. The core of any transformer is laminated so as to

    Text Solution

    |

  3. A transistor -oscillator using a resonant circuit with an inductor L (...

    Text Solution

    |

  4. The primary and secondary coils of a transmformer have 50 and 1500 tur...

    Text Solution

    |

  5. A transformer is used to light a 100 W and 110 V lamp from a 220V main...

    Text Solution

    |

  6. What is the value of inductance L for which the current is a maximum i...

    Text Solution

    |

  7. The primary and secondary coils of a transmformer have 50 and 1500 tur...

    Text Solution

    |

  8. A long solenoid has 500 turns. When a current of 2A is passed through ...

    Text Solution

    |

  9. A circular disc of radius 0.2 m is placed in a uniform magnetic fied...

    Text Solution

    |

  10. A long solenoid has 500 turns. When a current of 2 A is passed through...

    Text Solution

    |

  11. A conducting circular loop is placed in a uniform magnetic field 0.04T...

    Text Solution

    |

  12. A rectangular, a square , a circular and an elliptical loop, all in th...

    Text Solution

    |

  13. Which of the following figure correctly depicts the Lenz’s law. The ar...

    Text Solution

    |

  14. A conducting circular loop is placed in a uniform magnetic field, B=0....

    Text Solution

    |

  15. A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz f...

    Text Solution

    |

  16. The current i in a coil varies with time as shown in the figure. The v...

    Text Solution

    |

  17. The current (I) in the inductance is varying with time according to th...

    Text Solution

    |

  18. A coil of resistance 400Omega is placed in a magnetic field. If the ma...

    Text Solution

    |

  19. A wire loop is rotated in magneitc field. The frequency of change of d...

    Text Solution

    |

  20. A thin semicircular conducting ring (PQR) of radius r is falling with ...

    Text Solution

    |