Home
Class 12
PHYSICS
Magnetic moment of an electron of charge...

Magnetic moment of an electron of charge `e` moving in a circular orbit of radius `r` with speed `v is given by

A

(evr)

B

(evr/4)

C

(evr/2)

D

(evr/8)

Text Solution

Verified by Experts

The correct Answer is:
C
`M=IA`
`=(qV)/(2pir)pi r^(2)=(qVr)/(2)=(evR)/(2)`
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    NIKITA PUBLICATION|Exercise MCQs (Sensitivity and accuracy of M.C.G.)|1 Videos

  • MCQS FROM BOARD EXAM

    NIKITA PUBLICATION|Exercise COMMUNICATION SYSTEMS|7 Videos

Similar Questions

Explore conceptually related problems

What is the magnetic moment of an electron orbiting in a circular orbit of radius r with a speed v?

Obtain an expression for the magnetic moment of an electron moving with a speed ‘v’ in a circular orbit of radius ‘r’. How does the magnetic moment change when : (i) the frequency of revolution is doubled? (ii) the orbital radius is halved?

An electron of charge 'e' is revolving in a circular orbit of radius r around a nucleus with speed v. The equivalent current is

The angular momentum of the electron moving around the nucleus in a circular orbit of radius r is given by

An electron moves in circular orbit of radius r with constant speed v.The force acting in it is

If a charge q is moving in a circle of radius r with speed v, then the equivalent current will be :

In a hydrogen atom, an electron carrying charge 'e' revolves in an orbit of radius 'r' with speed 'v' . Obtain an expression for the magnitude of magnetic moment of a revolving electron.

If the angular momentum of an electron revolving in a circular orbit is L , then its magnetic moment is

An electron of charge e is moving in a circular orbit of radius r around a nucleus, at a frequency v. The magnetic moment associated with the orbital motion of the electron is

NIKITA PUBLICATION-MAGNETISM -MCQs
  1. Direction of magnetic field at equatorial point

    Text Solution

    |

  2. Consider a sort magnetic dipole o f magnetic length 10cm. Find its geo...

    Text Solution

    |

  3. Direction of magnetic field at equatorial point

    Text Solution

    |

  4. An iron rod of length L and magnetic moment M is bent in the form of a...

    Text Solution

    |

  5. A wire of length L metre , carrying a current I ampere is bent in the...

    Text Solution

    |

  6. A magnet of length 2l and pole strength m is equally divided in two pa...

    Text Solution

    |

  7. Magnetic potential at a point due to a short magnetic dipole of moment...

    Text Solution

    |

  8. On applying an external magnetic field , to a ferromagnetic substanc...

    Text Solution

    |

  9. The magnetic moment produced in a substance of 1 gm is 6xx10^(-7) "amp...

    Text Solution

    |

  10. If the magnet is cut into four equal parts such that their lengths and...

    Text Solution

    |

  11. At a point on the right bisector of a magnetic dipole the magnetic pot...

    Text Solution

    |

  12. A circular coil of radius r is fromed by wire of length L.If current I...

    Text Solution

    |

  13. The wire of length L is bent in the form of square and circle.The rati...

    Text Solution

    |

  14. Two wires of same length are shaped into a square and a circle. If the...

    Text Solution

    |

  15. Magnetic moment of an electron of charge e moving in a circular orbit ...

    Text Solution

    |

  16. A bar magnet of lenth l and magnetic dipole moment 'M' is bent in the ...

    Text Solution

    |

  17. The ratio of magnetic dipole moment to angular momentum of electron is

    Text Solution

    |

  18. Electromagnets are made of soft iron because soft iron has

    Text Solution

    |

  19. For dimgnetic materials magnetic susceptibility is

    Text Solution

    |

  20. A coil carrying current l has radius r and number of turns n it is r...

    Text Solution

    |