Home
Class 12
PHYSICS
The ratio of the magnetic field at the c...

The ratio of the magnetic field at the centre of a current carrying circular coil to its magnetic moment is x. If the current and radius both are doubled the new ratio will become

A

`2x`

B

`4x`

C

`x//4`

D

`x//8`

Text Solution

Verified by Experts

The correct Answer is:
D
`x=B/M=((mu_(0)i)/(2r))(1/(ipir^(2)))"or" x prop 1/(r^(3))`
i.e. will become `x/8` when radius and current both are doubled.
Promotional Banner

Topper's Solved these Questions

  • NTA TPC JEE MAIN TEST 102

    NTA MOCK TESTS|Exercise PHYSICS |30 Videos

  • NTA TPC JEE MAIN TEST 104

    NTA MOCK TESTS|Exercise PHYSICS (SUBJECTIVE NUMERICAL)|10 Videos

Similar Questions

Explore conceptually related problems

The magnetic field at the centre of the current carrying coil

The magnetic field at the centre of current carrying coil is

The ratio of the magnetic field at the centre of a current-carrying circular coil to its magnetic moment is x. If the current and radius each of them are made three times, the new ratio will become

What will be magnetic field at centre of current carrying circular loop of radius R?

Why is magnetic field maximum at the centre of a current-carrying coil?

The magnetic field near the centre of a current carrying coil is uniform and ________

NTA MOCK TESTS-NTA TPC JEE MAIN TEST 103-PHYSICS
  1. If a person goes to a height equal to radius of Earth from its surface...

    Text Solution

    |

  2. The pressure and volume of a given mass of gas at a given temperature ...

    Text Solution

    |

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

    Text Solution

    |

  4. Three long straight conductors are arranged parallel to each other in ...

    Text Solution

    |

  5. The equation of a transverse wave is given by y=10 sin pi (0.01 x -...

    Text Solution

    |

  6. A pendulum is executing simple harmonic motion and its maximum kinet...

    Text Solution

    |

  7. One division on the main scale is 1mm. It has 20 equal divisions on ve...

    Text Solution

    |

  8. In a hydraulic press, radii of connecting pipes, r(1) and r(2) are in ...

    Text Solution

    |

  9. Three thin uniform rods each of mass M and length L and placed along t...

    Text Solution

    |

  10. The rope shown in figure is wound around a cylinder of mass 4 kg and m...

    Text Solution

    |

  11. The luminosity of the Rigel star is 17000 times that of the sun. Assum...

    Text Solution

    |

  12. 400 c c volume of gas having gamma=5/2 is suddenly compressed to 100 c...

    Text Solution

    |

  13. A hydrogen like atom (described by the Bohr model) is observed to emit...

    Text Solution

    |

  14. Two batteries of different emfs and different internal resistances are...

    Text Solution

    |

  15. A concave mirror of focal length 20 cm and a convex lens of focal leng...

    Text Solution

    |

  16. Two particles are simultaneously thrown from the top of two towards as...

    Text Solution

    |

  17. A cart loaded with sand having total mass m(0)=1800kg moves on a str...

    Text Solution

    |

  18. A massless rod BD of length l is suspended by two identical massless s...

    Text Solution

    |

  19. A wide cylindrical vessel 50cm in height is filled with water and rest...

    Text Solution

    |

  20. A photographic camera with a lens of focal length 5 cm is used for cap...

    Text Solution

    |