Home
Class 12
PHYSICS
An air capacitor with plates of area 1 m...

An air capacitor with plates of area `1 m^(2)` and `0.01 metre` apart is charged with `10^(-6) C` of electricity. When the capacitor is submerged in oil of relative permittivity `2`, then the energy decreases by.

A

0.2

B

0.5

C

0.6

D

0.75

Text Solution

Verified by Experts

The correct Answer is:
B
`U^(/)=(U)/(K)`.
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A parallel plate capacitor of plate area (1xx3) m^(2) and plate separation 5.0 mm is charged to 10 kV in air. Find charge density and field displacement.

A parallel plate air capacitor has plates of area 0.5 m^(2) and plate separation of 2 cm. if epsi_(0)=8.8xx10^(-12)C^(2)//N-m^(2) then the capacitance of the capacitor is

The capacity of a parallel plate air capacitor is 10muF and it is given a charge of 40muC . The electrical energy stored in the capacitor is

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

A parallel plate vacuum capacitor with plate area A and separation x has charges +Q and -Q on its plates. The capacitor is disconnected from the source of charge, so the charge on each plate remains fixed. (a) What is the total energy stored in the capacitor? (b) The plates are pulled apart an additional distance dx. What is the change in the stored energy? (c) If F is the force with which the plates attract each other, then the change in the stored energy must equal the work dW = Fdx done in pulling the plates apart. Find an expression for F . (d) Explain why F is not equal to QE , where E is the electric field between the plates.

A parallel plate capacitor has plates of area 4 m^2 separated by distance of 0.5 mm. The capacitor is connected across a cell of emf 100 V. Find the capacitance, charge and energy stored in the capacitor.

The plates of a parallel plate capacitor have on area of 90 cm^(2) each and are separated by 2.5 mm . The capacitor is charged to 400 V. How much electrostatic energy is stored in it ? How much when it is filled with a dielectric medium K = 3 and then charged ? If it is first charged as an air capacitor and then filled with th dielectric, then ?

A parallel plate vacuum capacitor eith plate area A and separation x has charges +Q and -Q on its plates. The capacitor is disconnected from the source of charge, so the charge on each plate remains fixed. a. What is the total energy stored in the capacitor? b. The plates are pulled apart an additional distance each case. c. If F is the force with which the plates attract each other, the change in the stored energy must equal the work dW =F dx done in pulling the plates apart. Find an expression for F d. Energy storage in a capacitor can be limited by the maximum electric field between the plates. What is the ratio of the electric field for the series for parallel combinations?

A parallel plate capacitor of plate area 0.2m^(2) and spacing 10^(-2) m is charged to 10^(3) volts and is then disconnected from the battery. How much work is required if the plates are pulled apart to double the plate spacing ? Calculate the final voltage onthe capacitor epsi_(0)^(-1)=36pixx10^(9)VmA^(-1)s^(-1)

A parallel-plate air capacitor has rectangular plates each of size 40 cm xx 10cm , separated by 1mm, if a charge of 10^(-10) C is given to the capacitor calcualte the potential difference and electric field between the plates.

NARAYNA-CAPACITANCE-Level-III (C.W)
  1. A capacitor of capacitance C is charged to a potential difference V fr...

    Text Solution

    |

  2. A parallel plate capacitor with plates separated by air acquires 1 mu ...

    Text Solution

    |

  3. An air capacitor with plates of area 1 m^(2) and 0.01 metre apart is c...

    Text Solution

    |

  4. Three uncharged capacitors of capacities C(1),C(2) and C(3) are connec...

    Text Solution

    |

  5. In the given figure the capacitor of plate area A is charged upto char...

    Text Solution

    |

  6. If metal section of shape H is inserted in between two parallel plates...

    Text Solution

    |

  7. The equivalent capacitance C(AB) of the circuit shown in the figure is...

    Text Solution

    |

  8. A solid conducting sphere of radius 10 cm is enclosed by a thin metall...

    Text Solution

    |

  9. A condenser of capacity 500 mu F is charged at the rate of 400 mu F pe...

    Text Solution

    |

  10. The equivalent capacitance of the arrangement shown in figure, if A is...

    Text Solution

    |

  11. Two capacitors C(1) = 2 muF and C(2) = 6 muF in series, are connected ...

    Text Solution

    |

  12. A capacitor is chared to store an energy U. The charging battery is di...

    Text Solution

    |

  13. A parallel plate condenser with a dielectric of dielectric constant K ...

    Text Solution

    |

  14. A fully charged capacitor has a capacitance 'C'. It is discharged thro...

    Text Solution

    |

  15. A parallel plate capacitor of capacitty 100 mu F is charged by a batte...

    Text Solution

    |

  16. The equivalent capacity between the points A and B in the adjoining ci...

    Text Solution

    |

  17. A parallel plate capacitor with air as medium between the plates has a...

    Text Solution

    |

  18. The capacity of a parallel plate condenser with air medium is 60 mu F ...

    Text Solution

    |

  19. In the adjoining diagram, the condenser C will be fully charged to pot...

    Text Solution

    |

  20. The capacity between the point A and B in the adjoining circuit will b...

    Text Solution

    |