Home
Class 12
PHYSICS
The resistances of three parts of a cir...

The resistances of three parts of a circular loop are as shown in Fig. The magnetic field at the centre O is (current enters at A and leaves at B and C as shown)

A

`(mu_(0)I)/(6a)`

B

`(mu_(0)I)/(3a)`

C

`2/3 (mu_(0)I)/a`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D
No current will flow through section `BC` as the potential of point `B` and `C` are same hence magnetic field at centre `O` will be equal and opposite due to section `AB` and `AC` hence cancel out.
Promotional Banner

Topper's Solved these Questions

  • SOURCE AND EFFECT OF MAGNETIC FIELD

    A2Z|Exercise Problems Based On Mixed Concepts|32 Videos

  • SOURCE AND EFFECT OF MAGNETIC FIELD

    A2Z|Exercise Section B - Assertion Reasoning|31 Videos

  • SOURCE AND EFFECT OF MAGNETIC FIELD

    A2Z|Exercise Magnetic Field Due To Current|44 Videos

  • SEMICONDUCTOR ELECTRONICS

    A2Z|Exercise EXERCISE|29 Videos

  • WAVE OPTICS

    A2Z|Exercise Section D - Chapter End Test|29 Videos

Similar Questions

Explore conceptually related problems

A current l flows through a closed loop as shown in figure .The magnetic field at the centre O is

The wire loop shown in figure carries a current as shown. The magnetic field at the centre O is ,

For the arrangement shown in Fig. determine the magnetic field at centre O.

Magnetic field at the centre of a circular loop & arc

A current I is flowing through the loop , as shown in the figure . The magnetic field at centre O is

A2Z-SOURCE AND EFFECT OF MAGNETIC FIELD-Magnetic Field Due To Circular Arc
  1. Two similar coils are kept mutually perpendicular such that their cent...

    Text Solution

    |

  2. In the figure, what is the magnetic field at the point O?

    Text Solution

    |

  3. The resistances of three parts of a circular loop are as shown in Fig...

    Text Solution

    |

  4. Considering magnetic field along the axis of a circular loop of radius...

    Text Solution

    |

  5. In Fig. infinite conducting rings each having current i in the directi...

    Text Solution

    |

  6. The field normal to the plane of a wire of n turns and radius r which ...

    Text Solution

    |

  7. Two identical wires A and B , each of length 'l', carry the same curre...

    Text Solution

    |

  8. Two circular coils X and Y, having equal number of turns and carrying ...

    Text Solution

    |

  9. The magnetic field at the centre of the circular loop as shown in Fig....

    Text Solution

    |

  10. Figure shows three cases: in all case the circular part has radius r a...

    Text Solution

    |

  11. The ratio of the magnetic field at the centre of a current carrying ci...

    Text Solution

    |

  12. A long straight non-conducting string carriers a charge density of 40 ...

    Text Solution

    |

  13. In a bent wire shown in figure, a current I is passed. Find the value ...

    Text Solution

    |

  14. The current in the wire is I. The current comes from infinite parallel...

    Text Solution

    |

  15. A circular current carrying coil has a radius R. The distance from the...

    Text Solution

    |

  16. A square conducting loop of side length L carries a current I.The magn...

    Text Solution

    |

  17. A current i ampere flows in a circular arc of wire whose radius is R, ...

    Text Solution

    |

  18. An otherwise infinite, straight wire has two concentric loops of radii...

    Text Solution

    |

  19. For c=2a if, the magnetic field at point P will be zero when

    Text Solution

    |

  20. A non - popular loop of conducting wire carrying a current I is placed...

    Text Solution

    |