Home
Class 12
PHYSICS
In a parallel plate capacitor with air, ...

In a parallel plate capacitor with air, the distance between the plates is reduced to half and the space is filled with dielectric of constant 4. If initial capacity of capacitor is `2muF`, then final value of capacity is

A

`4muF`

B

`8muF`

C

`16muF`

D

`2muF`

Text Solution

Verified by Experts

The correct Answer is:
C
`C_(1)=2muF,C_(2)=?" ""If"" "d_(2)=d_(1)/2,k=4,C_(m)=?`
`Cprop1/d" "thereforeC_(2)=4muF`
Now`" "C_(m)=C_(2)xxk=4xx4=16muF`
Promotional Banner

Topper's Solved these Questions

  • ELECTRONS AND PHOTONS

    NIKITA PUBLICATION|Exercise MCQs|162 Videos

  • GRAVITATION

    NIKITA PUBLICATION|Exercise Multiple Choice Questions|409 Videos

Similar Questions

Explore conceptually related problems

In a parallel plate air capacitor the distance between plates is reduced to one fourth and the space between them is filled with a dielectric medium of constant 2. If the initial capacity of the capacitor is 4muF . then its new capacity is .

In a parallel plate capacitor , the capacity increases if

To reduce the capacitance of parallel plate capacitor, the space between the plate is

A parallel plate capacitor with air between the plates has a capacitance of 8pF. The separation between the plates is now reduced by half and the space between them is filled with medium of dielectric constant 5. The value of capacitance of a capacitor in the second case is

The capacity of a parallel plate capacitor with no dielectric substance but with a separation is reduced to half and it is filled with a dielectirc substance of value 2.8 . The final capacity of the capacitor is

A parallel plate capacitor with air inbetween the paltes has a capacitance of 8 pF. The separation between the plates is now reduced by half and the space between them is filled with a medium of dielectric constant 5. Calculate the new value of capacitance.

A parallel plate capacitor with air in between the plates has a capacitance of 8 pF . The separation between the plates is now reduced to half and the space between them is filled with a medium of dielectric constant 5. Calculate the value of capacitance in the second case.

If the distance between the plates of parallel plate capacitor is halved and the dielectric constant of dielectric is doubled, then its capacity will

The capacity of a parallel plate condenser without any dielectric is C. If the distance between the plates is doubled and the space between the plates is filled with a substance of dielectric constant 3, the capacity of the condenser becomes:

A parallel plate capacitor with air between the plates has a capacitance C. If the distance between the plates is doubled and the space between the plates is filled with a dielectric of dielectric constant 6, then the capacitance will become.

NIKITA PUBLICATION-ELECTROSTATICS-Multiple Choice Questions
  1. If charge q is induced on outer surface of sphere of radius R, then in...

    Text Solution

    |

  2. When three identical capacitors are connected in series, their equival...

    Text Solution

    |

  3. In a parallel plate capacitor with air, the distance between the plate...

    Text Solution

    |

  4. Unit of electric flux is

    Text Solution

    |

  5. Consider a sphere of radius R and cylinder of length L. If both have s...

    Text Solution

    |

  6. If 4 xx 10^(20)eV energy is required to move a charge of 0.25 coulomb ...

    Text Solution

    |

  7. A parallel plate capacitor has a capacity c. If a medium of dielectric...

    Text Solution

    |

  8. Two capacitors of capacities 1muF and 4muF are connected in series wit...

    Text Solution

    |

  9. Energy stored in a condenser of capacity 10 uF, charged to 6kV is use...

    Text Solution

    |

  10. Three charges +5C, +7C and -4C are situated within a closed surface an...

    Text Solution

    |

  11. Electric intensity at a point just outside a charged conductor of any ...

    Text Solution

    |

  12. A capacitor of 20muF is given a potential difference of 500 V and a 10...

    Text Solution

    |

  13. A string is compressed by 2 mm by a force of 8 N and condenser is char...

    Text Solution

    |

  14. Condenser is a device used to store

    Text Solution

    |

  15. Two capacitor each of capacity 4muF are connected in series and third ...

    Text Solution

    |

  16. Three capacitor of capacitance C(mu F) are connected in parallel to wh...

    Text Solution

    |

  17. If dielectric is inserted in charged capacitor ( battery removed ), t...

    Text Solution

    |

  18. A charged oil drop is suspended in a uniform filed of 3xx10^4 v//m so ...

    Text Solution

    |

  19. In a parallel plate capacitor , the capacity increases if

    Text Solution

    |

  20. The electric intensity of outside a charged sphere of radius R at a di...

    Text Solution

    |