Home
Class 12
PHYSICS
The magnetic field at the centre of a ci...

The magnetic field at the centre of a circular coil of radius `r` carrying current `l` is `B_(1)`. The field at the centre of another coil of radius `2r` carrying same current `l` is `B_(2)`. The ratio `(B_(1))/(B_(2))` is

A

`1/2`

B

1

C

2

D

4

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • KINETIC THEORY OF GASES

    ERRORLESS |Exercise QUESTIONS|126 Videos

  • MAGNETISM

    ERRORLESS |Exercise Assertion & Reason|1 Videos

Similar Questions

Explore conceptually related problems

The magnetic field at the centre of current carrying coil is

The magnetic field at centre of a hexagonal coil of side l carrying a current I is

The magnetic field at the centre of the current carrying coil

What is the magnetic field at a distance R from a coil of radius r carrying current l ?

The magneitc field produced at the center of a current carrying circular coil of radius r, is

A circular coil of n turns and radius r carries a current I. The magnetic field at the center is

Find the magnetic field B at the centre of a rectangular loop of length l and width b, carrying a current i.

ERRORLESS -MAGNETIC EFFECT OF CURRENT-Exercise
  1. The dimension of magnetic field in M,L,T and C (coulomb) is given as

    Text Solution

    |

  2. A current of 2 amp. flows in a long, straight wire of radius 2 mm. The...

    Text Solution

    |

  3. The magnetic field at the centre of a circular coil of radius r carryi...

    Text Solution

    |

  4. 1A current flows through an infinitely long straight wire. The magneti...

    Text Solution

    |

  5. Two infinitely long parallel wires carry equal current in same directi...

    Text Solution

    |

  6. A wire in the from of a square of side 'a' carries a current i. Then t...

    Text Solution

    |

  7. An electron moving in a circular orbit of radius r makes n rotation...

    Text Solution

    |

  8. A long solenoid has n turns per metre and current IA is flowing throug...

    Text Solution

    |

  9. A wire carrying current I is shaped as shown. Section AB is a quarter ...

    Text Solution

    |

  10. Two long straight wires are set parallel to each other. Each carriers ...

    Text Solution

    |

  11. A magnetic field can be produced by

    Text Solution

    |

  12. Which of the following is a unit of permeability ?

    Text Solution

    |

  13. A long straight wire carries a current of pi amp. The magnetic field d...

    Text Solution

    |

  14. When a certain length of wire is turned into one circular loop, the ma...

    Text Solution

    |

  15. Gauss is unit of which quantity

    Text Solution

    |

  16. On connecting a battery to the two corners of a diagonal of a square c...

    Text Solution

    |

  17. The ratio of the magnetic field at the centre of a current carrying co...

    Text Solution

    |

  18. A part of a long wire carrying a current i is bent into a circle of ra...

    Text Solution

    |

  19. The core of a toroid having 3000turns has inner and outer radii of 11c...

    Text Solution

    |

  20. The magnetic field near a current carrying conductor is given by

    Text Solution

    |