Home
Class 12
PHYSICS
A parallel-plate capacitor of capacity 0...

A parallel-plate capacitor of capacity `0.5pF` is to be constructed using paper sheets of thickness 0.04 mm as dielectric. Find how many circular metal foils of diameter 0.1m will have to be used. Take the dielectric constant of peper used as 4.

Text Solution

Verified by Experts

The correct Answer is:
73
Promotional Banner

Topper's Solved these Questions

  • CAPACITORS

    SL ARORA|Exercise Problem From Competitive Examinations|17 Videos
  • ATOMS, NUCLEI AND MOLECULES

    SL ARORA|Exercise Problems For Self Practice|87 Videos
  • CHEMICAL EFFECT OF CURRENT

    SL ARORA|Exercise TYPE-B|5 Videos

Similar Questions

Explore conceptually related problems

A parallel plate capacitor of capacitance has spacing between two plates having area The region between the plates is filled with dielectric layers, parallel to its plates, each with thickness delta=d/N . The dielectric constant of the m^(th) layer is K_(m)=K(1+m/N) . For a very large N(gt10^(3)) , the capacitance C is alpha((Kin_(0)A)/(dln2)) . Find the value of alpha.[in_(0) is the permittivity of free space]

A parallel plate capacitor of capacitance C has spacing d between two plates having area A. The region between the plates is filled with N dielectric layers, parallel to its plates, each with thickness delta =(d)/(N) .The dielectric constant of the m^(th) layer is K_m =K(1+(m)/(N)) . For a very large N(lt 10 ^(3)) , the capacitance C is alpha ((kin_0A)/( d1n 2)) .The value of alpha will be . [in _0 is the permittivity of free space ]

A parallel plate capacitor is to be constructed which can store q = 10 muC charge at V = 1000 volt. The minimum plate area of the capacitor is required to be A_(1) when space between the plates has air. If a dielectric of constant K = 3 is used between the plates, the minimum plate area required to make such a capacitor is A_(2) . The breakdown field for the dielectric is 8 times that of air. Find (A_(1))/(A_(2))

A parallel-plate capacitor is made up of 15 strips, each of 6 cm xx 4 cm, separated by sheet of mica of dielectric coefficent 6 and constant thickness of 0.15 mm. Calculate its capacitance.

A parallel plate capacitor is constructed with plates of area 0.0280 m^(2) and separation 0.550 mm . Find the magnitude of the charge on each plate of this capacitor when the potential between the plates is 20.1 V

The plates of a parallel plate capacitor are separated by a distance d = 1 cm . Two parallel sided dielectric slabs of thickness 0. 7cm and 0.3cm fill the space between the plates. If the dielectric constants of the two slabs are 3 and 5 respectively and a potential difference of 440V is applied across the plates. Find (a) The electric field intensities in each of the slabs. (b) The ratio of electric energies stored in the first to that in the second dielectric slab.

A parallel-plate capacitor contains a mica sheet (thickness 10^(-3) m) and a sheet of fibre (thickness 0.5xx10^(-3) m). The dielectric constant of mica is 8 and that of the fibre is 2.5. Assuming that the fibre breaks down when subjected to an electric field of 6.4xx10^(6)Vm^(-1) , find the maximum safe voltage that can be applied to the capacitor.

A parallel-plate of capacitor of capacitance 5mu F is connected in a battery of emf 6V. The separation between the plate is 2mm.(a) Find the charge on the positive plate.(b) find the eletric field between the plate.(c) A dielectric slab of thickness 1 mm and dielectric constant 5 is inserted into the gap to occupy the lower half of it.Find the capacitance of the new combination .(d)How much charge has flow n through the battery after the slab is inserted?

The capacitance of a capacitor made by a thin metal foil is 2muF . If the foil is filled with paperr of thickness 0.15 mm, dielectric constant of paper is 2.5 and width of the paper is 400 mm. what is the length of foil?

SL ARORA-CAPACITORS-problem for self practive
  1. Two capacitors of capacitances 4muF and 6muF are connected in series w...

    Text Solution

    |

  2. Two capacitors of capacitances 20 .0pF and 50.0pF are connected in se...

    Text Solution

    |

  3. A capacitor charged from a 50 V d.c. supply is found to have charge ...

    Text Solution

    |

  4. The plates of a parallel plate capacitor have an area of 100cm^(2) eac...

    Text Solution

    |

  5. A 800 pF capacitor is charged by a 100 V battery. After sometime, the ...

    Text Solution

    |

  6. A 20muF capacitor charged to 100 V is connected in parallel to a 10muF...

    Text Solution

    |

  7. Two insulated metallic spheres of 3mu F and 5 muF capacitances are cha...

    Text Solution

    |

  8. Three capacitors of 10,15 and 30 muF are connected in series and on th...

    Text Solution

    |

  9. Two capacitors are connected in parallel and the energy stored is 18 J...

    Text Solution

    |

  10. Two capacitors of capacitances 25muF and 100 muF are connected in seri...

    Text Solution

    |

  11. In the network shown in figure. C(1)=2.0muF,C(2)=6.0 and C(3)=2.5muF. ...

    Text Solution

    |

  12. Two parallel plates, separated by 2 mm of air, have a capacitance of 3...

    Text Solution

    |

  13. The radii of cahrged metallic spheres are 5 cm and 10 cm. both have a ...

    Text Solution

    |

  14. A parallel-plate capacitor having plate are 100 cm ^2 and separation ...

    Text Solution

    |

  15. Two parallel plate capacitors, each of capacitance 40 muF, are connect...

    Text Solution

    |

  16. A parallel-plate capacitor of consists of 26 metal strips, each of 3c...

    Text Solution

    |

  17. A parallel-plate capacitor of capacity 0.5pF is to be constructed usin...

    Text Solution

    |

  18. A slab of material of dielectric constant K has the same area as the ...

    Text Solution

    |

  19. Calculate the capacitance of a spherical capacitor consisting of two c...

    Text Solution

    |

  20. The insulated plates of a parallel plate capacitor has a charge densit...

    Text Solution

    |