Home
Class 12
PHYSICS
A thin disc of dielectric material, with...

A thin disc of dielectric material, with a total charge +q distributed uniformly over its surface rotates n times per second about an axis perpendicualr to the surface of the disc and passing through its center. Find the magnetic induction at the center of the disc. The radius of the disc is equal to r.

Text Solution

Verified by Experts

The correct Answer is:
`(mu_(0)nq)/(r )`
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC EFFECT OF CURRENT

    NN GHOSH|Exercise Exercises|25 Videos

  • MAGNETIC DIPOLE

    NN GHOSH|Exercise EXERCISES|10 Videos

  • MAGNETIC FIELD AND POTENTIAL

    NN GHOSH|Exercise EXERCISES B|1 Videos

Similar Questions

Explore conceptually related problems

A this disc of dielectric material, with a total charge +q distributed uniformly over its surface, rotates with angular speed omega about an axis perpendicular to the disc and passing through its centre .Find the magnetic moment with its angular momentum , assuming that its mass is m. [Hint : Consider a ring of radius x and thickness dx. Calculate charge on it and then the current consituited by its rotation .Find its magnetic moment and integrate for the whole disc.]

Two thin discs each of mass M and radius r metre are attached to form a rigid body as shown in figure. The rotational inertia of this body about an axis perpendicular to the plane of disc B and passing through its centre is

Two thin discs each of mass M and radius r are attached as shown in figure, to from a rigid body. The rotational inertia of this body about an axis perpendicular to the plane of disc B and passing through its centre is : .

Radius of gyration of disc rotating about an axis perpendicular to its plane passing through through its centre is (If R is the radius of disc)

Find the moment of inertia of a uniform half-disc about an axis perpendicular to the plane and passing through its centre of mass. Mass of this disc is M and radius is R.

The moment of inertia of a uniform semicircular disc of mass M and radius r about a line perpendicular to the plane of the disc through the center is

A metal disc of radius R rotates with an angular velcoity omega about an axis perpendicular to its plane passing through its centre in a magnetic field B acting perpendicular to the plane of the disc. Calculate the induced emf between the rim and the axis of the disc.

A non-conducting thin disc of radius R charged uniformly over one side with surface density s rotates about its axis with an angular velocity omega . Find (a) the magnetic induction at the centre of the disc, (b) the magnetic moment of the disc.

A thin disc of radius R has charge Q distributed uniformly on its surface. The disc is rotated about one of its diametric axis with angular velocity omega . The magnetic moment of the arrangement is

A non-conducting thin disc of radius R charged uniformly over one side with surface density sigma , rotates about its axis with an angular velocity omega . Find (a) the magnetic field induction at the centre of the disc (b) the magnetic moment of the disc.

NN GHOSH-MAGNETIC EFFECT OF CURRENT-Exercises
  1. Calcualte the current in amperes through a circular loop of 40 turns a...

    Text Solution

    |

  2. A circular coil has 63 turns, each of radius 22cm. It is placed in the...

    Text Solution

    |

  3. A circular coil with 10 turns of mean radius 10 cm is placed in the ma...

    Text Solution

    |

  4. A current of 0.1A passes through a circular coil, 15 cm in diameter an...

    Text Solution

    |

  5. Calculate the magnetic field at the center of a regualr hexagon, 10 cm...

    Text Solution

    |

  6. Two long, straight parallel conductors each carrying 2A current in the...

    Text Solution

    |

  7. Calculate the magnetic field at the orthocenter of an equilateral tria...

    Text Solution

    |

  8. Calculate the magnetic field at the corner of a right angled triangle ...

    Text Solution

    |

  9. The circular coil of tangent galvanometer is set at right angles to th...

    Text Solution

    |

  10. A long thin wire is placed along the y-axis (just outside) of a frame ...

    Text Solution

    |

  11. A circular loop of radius 10 cm carries a current of 15A. At its cente...

    Text Solution

    |

  12. Two long straight conductors carrying current I are located at the cor...

    Text Solution

    |

  13. A thin disc of dielectric material, with a total charge +q distributed...

    Text Solution

    |

  14. A conductor of lengh l is placed in the east-west line on a table. Sud...

    Text Solution

    |

  15. A long wire is bent into the shape shown in the figure. Without cross-...

    Text Solution

    |

  16. Two long straight conductors are connected radially to two arbitary po...

    Text Solution

    |

  17. Calculate the force of attraction per unit length between two long str...

    Text Solution

    |

  18. A wire of c.s.S = 2.5 mm^(2) is bent to make the three sides of a squa...

    Text Solution

    |

  19. A current I flows along a thin-walled, long, half-cylinder of radius R...

    Text Solution

    |

  20. Find the magnetic induction at the point O of the following figures if...

    Text Solution

    |