Home
Class 12
PHYSICS
The natural frequency of an L-C circuit ...

The natural frequency of an L-C circuit is 125000 cycles/s. When a dielectric medium of dielectric constant K is introduced between the plates of the capacitor, the frequency decreases by 25 kHz. The value of K is

A

3

B

2.1

C

1.56

D

1.7

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    AAKASH SERIES|Exercise EXERCISE - II|8 Videos
  • APPENDICES ( REVISION EXERCISE )

    AAKASH SERIES|Exercise REVISION EXERCISE (MAGNETISM AND MATTER )|52 Videos

Similar Questions

Explore conceptually related problems

The natural frequency of an LC - circuit is 1,25,000 cycles per second. Then the capacitor C is replaced by another capacitor with a dielectric medium of dielectric constant k. In this case, the frequency decreases by 25 kHz. The value of k is

The resonant frequency of L-C circuit is f_0 before insertion of dielectric of (dielectric constant) (E_r = 4) . After inserting the dielectric, the resonant frequency will be

The parallel combination of two air filled parallel plate capacitor of capacitance C and nC is connected to a battery of voltage, V. When the capacitors are fulley charged, the battery is removed and after that a dielectric material of dielectric constant K is placed between the two plates of the first capacitors. the new potential difference of the combined system is

In the arrangement shown, the battery is disconnected and a dielectric slab of dielectric constant K is insereted between the plates of capacitor with capacitance C, so as to completely fill the space. What is the final potential differnece across capacitor with capacitance 2C ?

As shown in Fig, a dielectric material of dielectric constant K is insered in half portan between plates of parallel plate capacitor. If its initial capacitance is C, what is the new capacitance ?

A parallel plate capacitor is charged by a battery. After some time the battery is disconnected and a dielectric slab of dielectric constant K is inserted between the plates. How would (i) the capacitance, (ii) the electric field between the plates and (iii) the energy stored in the capacitor, be affected ? Justify your answer.

Two identical capacitors A and B shown in the given circuit are joined in series with a battery. If a dielectric slab of dielectric constant K is slipped between the plates of capacitor B and battery remains connected, then the energy of capacitor A will-

The potential enery of a charged parallel plate capacitor is U_(0) . If a slab of dielectric constant K is inserted between the plates, then the new potential energy will be

The potential enery of a charged parallel plate capacitor is U_(0) . If a slab of dielectric constant K is inserted between the plates, then the new potential energy will be

Figue shows a parallel plate capacitor with plate area A and plate separation d . A potential difference is being applied between the plates. The battery is then disconnected and a dielectric slab of dieletric constant K is placed in between the plates of the capacitor as shown. The electric field in the dielectric slab is

AAKASH SERIES-ALTERNATING CURRENT-EXERCISE - III
  1. An ideal choke takes a current of 10 A when connected to an ac supply ...

    Text Solution

    |

  2. An ideal choke takes a current of 8A when connected to an a.c. source ...

    Text Solution

    |

  3. When 100 V DC is applied across a solenoid , a current of 1 A flows in...

    Text Solution

    |

  4. In an L-R circuit, the inductive reactance is equal to the resistance ...

    Text Solution

    |

  5. An alternating voltage E = 200sqrt 2sin(100t) is connected to a muF ca...

    Text Solution

    |

  6. At a frequency omega(0) the reactance of a certain capacitor equal tha...

    Text Solution

    |

  7. An L-C-R series circuit consists of a resistance of 10 Omega a capacit...

    Text Solution

    |

  8. An L-C-R seriescircuit with a resistance of 100Omega connected to an A...

    Text Solution

    |

  9. An electric lamp designed for operation on 110 V AC is connected to a ...

    Text Solution

    |

  10. In a series LCR circuit the frequency of a 10 V, AC voltage source is ...

    Text Solution

    |

  11. A circuit draws 330 W from a 110 V , 60 Hz AC line. The power factor i...

    Text Solution

    |

  12. The natural frequency of an L-C circuit is 125000 cycles/s. When a die...

    Text Solution

    |

  13. The self inductance of the motor of an electric fan is 10 H. In order ...

    Text Solution

    |

  14. In an oscillating L-C circuit, the maximum charge on the capacitor is ...

    Text Solution

    |

  15. Powre dissipated in an LCR series circuit connected to an ac source of...

    Text Solution

    |

  16. Which of the following combination should be selected for better tunin...

    Text Solution

    |

  17. A small town with a demand of 800 kW of electric power at 220 V is sit...

    Text Solution

    |

  18. A 220 V input is supplied to a transformer. The output circuit draws a...

    Text Solution

    |

  19. A transformer having efficiency of 90% is working on 200 V and 3kW pow...

    Text Solution

    |

  20. The figure shows variation of R, underset(L)(X) and underset(C )(X) wi...

    Text Solution

    |