Home
Class 12
PHYSICS
The ratio of magnetic field and magnetic...

The ratio of magnetic field and magnetic moment at the centre of a current carrying circular loop is x. When both the current and radius is doubled the ratio will be

A

x/8

B

x/4

C

x/2

D

2x

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER 2009

    WB JEE PREVIOUS YEAR PAPER|Exercise Multiple Choice Questions (Physics)|40 Videos

  • QUESTION PAPER 2011

    WB JEE PREVIOUS YEAR PAPER|Exercise PHYSICS|39 Videos

Similar Questions

Explore conceptually related problems

Ratio of magnetic fields at the centre of a current carrying coil of radius r and at a distance 3r on its axis is

Using Bio-Savart law determine the magnetic field at any point on the axis of a current carrying circular loop.

Find the magnetic field at the centre of a square of side 'a' carrying current IA.

What will be the magnetic field at the centre C o the circular loop?

State Biot Savarts law. Write down the expression of magnetic field at the centre of a current carrying circular coil of N turns.

Magnetic field intensity H at the centre of a circular loop of radius r carrying current I e.m.u is

How will the magnetic field intensity, at the centre of a circular coil carrying currents, change if the current through the coil is doubled and radius of the coil is halved ?

How will the magnetic field internsity at the centre of circular coil carrying current change, if the current through the coil is doubled and the radius of the coil is halved?

Determine the magnetic field in the following cases applying Biot-Savart law : at the centre of a current carrying circular loop.

The magnetic field developed at a point near a straight current carrying conductor depends on

WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2010-PHYSICS
  1. The reading on the ammeter in the following figure will be

    Text Solution

    |

  2. An wire of resistance R is elongated n-fold to make a new uniform wire...

    Text Solution

    |

  3. The ratio of magnetic field and magnetic moment at the centre of a cur...

    Text Solution

    |

  4. The current through a coil of self inductance L = 2mH is given by I=t^...

    Text Solution

    |

  5. The magnetic flux across a loop of resistance 10Omega is given by phi...

    Text Solution

    |

  6. The decimal equivalent of the binary number (11010.101)(2) is

    Text Solution

    |

  7. In a common emitter configuration, a transistor has beta=50 and input...

    Text Solution

    |

  8. Half-life of a radioactive substance is 20 minute. The time between 20...

    Text Solution

    |

  9. The energy released by the fission of one uranium atom is 200 MeV. The...

    Text Solution

    |

  10. A body is projected with a speed u m/s at an angle beta with the hori...

    Text Solution

    |

  11. A ball is projected horizontally with a velocity of 5 m/s from the top...

    Text Solution

    |

  12. A stone falls freely from rest and the total distance covered by it in...

    Text Solution

    |

  13. Two blocks of 2 kg and 1kg are in contact on a frictionless table. If ...

    Text Solution

    |

  14. If momentum is increased by 20%, then kinetic energy increases by

    Text Solution

    |

  15. A boy of mass 40 kg is climbing a vertical pole at a constant speed. I...

    Text Solution

    |

  16. The value of lamda for which the two vectors hata = 5hati+lamdahatj+...

    Text Solution

    |

  17. If veca+vecb = vecc and a+b=c then the angle included between veca an...

    Text Solution

    |

  18. The height vertically above the earth's surface at which the accelerat...

    Text Solution

    |

  19. The change in the gravitational potential energy when a body of mass m...

    Text Solution

    |

  20. A particle of mass m is attached to three identical massless springs o...

    Text Solution

    |