Home
Class 12
PHYSICS
A circular metal plate of radius 10 cm i...

A circular metal plate of radius 10 cm is given a charge of `20muC` on its surface. The charge density of the plate is

A

`3.185xx10^(-6)C//m^(2)`

B

`2xx10^(-6)C//m^(2)`

C

`3xx10^(-9)C//m^(2)`

D

`3.184xx10^(-4)C//m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
`sigma=q/(2piR^(2))=(20xx10^(-6))/(2xx3.14xx10^(-2))`
`= 3.184xx10^(-4)C//m^(2)`
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

A metal plate of area 0.5 m^(2) is given a charge of 50muC , what is the charge density ?

A circular metal plate of radius 10 cm is given a charge of 20muC . The outward pull on the plate in the vacuum is

A metal sphere of radius 10 cm is given a charge of 12muC . The force acting on unit area of its surface is

A metal plate of area 2m^(2) is charged with 12xx10^(-6)C . The surface surface density of charge is

A metal wire is bent in a circle of radius 10 cm. It is given a charge 200 muC which is spread on it uniformly. Calculate the electric potential at its center.

A paralel plate capacitory has each plate of ara A=10 sq. cm. it is given a charge of 1 C. as one of the plates was slightly damaged it was cut annd the plate area was reduced to 5 sq. cm. the quantity of charge on each plate will

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 air filled parallel plate capacitor having circular plates of diameter D is given a charge Q.The magnitude of the force acting between plates is

To what potential must a insulated sphere of radius 10 cm be charged so that the surface density of charge is equal of 1 muC//m^ 2 .

NIKITA PUBLICATION-ELECTROSTATICS-Multiple Choice Questions
  1. The surface density of charge on a conductor situated in air, is 2xx10...

    Text Solution

    |

  2. An electric cable of diameter 10 cm runs under water for a distance of...

    Text Solution

    |

  3. A circular metal plate of radius 10 cm is given a charge of 20muC on i...

    Text Solution

    |

  4. The surface density of charge on the earth's surface is 2.65xx10^(-9)C...

    Text Solution

    |

  5. The mechanical force acting on a unit area of a charged conductor is

    Text Solution

    |

  6. The mechanical stress of a charged conductor is directly proportional ...

    Text Solution

    |

  7. A metal surface of area 1 m^(2) is charged with sqrt(8.85)muC in air. ...

    Text Solution

    |

  8. In an electron gun, the electrons are accelerated by the potential V. ...

    Text Solution

    |

  9. A charged conductor of area ds is placed in electric field of strength...

    Text Solution

    |

  10. The mechanical stress of a charged conductor of charge density sigma i...

    Text Solution

    |

  11. A metal sphere of radius 10 cm is given a charge of 12muC. The force a...

    Text Solution

    |

  12. Inside a hollow charged spherical conductor, the potential

    Text Solution

    |

  13. The energy per unit volume of a dielectric medium is directly proporti...

    Text Solution

    |

  14. The energy density of air medium is 44.25xx10^(-8)J//m^(3). The intens...

    Text Solution

    |

  15. The energy density of a medium of dielectric constant k surrounding th...

    Text Solution

    |

  16. Calculate the energy per unit volume of a medium of dielectric constan...

    Text Solution

    |

  17. The electrostatic energy stored in the 1 litre volume of air when it i...

    Text Solution

    |

  18. A potential difference of 50 V is maintained between the two plates of...

    Text Solution

    |

  19. A cube of marble of each side 5m long is placed in electric field of i...

    Text Solution

    |

  20. A small sphere carries a charge of 20muC. The energy density of electr...

    Text Solution

    |