Home
Class 12
PHYSICS
If we double the radius of a current car...

If we double the radius of a current carrying coil keeping the current unchanged, the magnetic field at its centre

A

becomes four times

B

doubled

C

remains unchanged

D

halved

Text Solution

Verified by Experts

The correct Answer is:
4
Promotional Banner

Topper's Solved these Questions

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise LEVEL-I(C.W)|58 Videos

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise Level-II(C.W)|63 Videos

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise EXERCISE - 4|20 Videos

  • MAGNETISM AND MATTER

    NARAYNA|Exercise EXERCISE - 4 (SINGLE ANSWER TYPE QUESTION)|17 Videos

  • NUCLEAR PHYSICS

    NARAYNA|Exercise LEVEL-II-(H.W)|9 Videos

Similar Questions

Explore conceptually related problems

If we double the radius of the coil keeping the current through it unchanged, the magnetic field on its axis at very very far away points

The ratio of magnetic fields on the axis of a cricular current cerrying coil of radius a to the magnetic field at its centre lying on the periphery of the surface of the sphere will be .

Find the magnetic field induction at a point on the axis of a circular coil carrying current and hence find the magnetic field at the centre of circular coil carrying current.

The ratio of the magnetic field at the centre of a current carrying circular wire and the magnetic field at the centre of a semi-circular coil made from the same length of wire will be

The ratio of the magnetic field at the centre of a current carrying circular wire and the magnetic field at the centre of a square coil made from the same length of wire will be

The (tau - theta) graph for a current carrying coil placed in a uniform magnetic field is

A coil of 50 turns and 4cm radius carries 2A current then magnetic field at its centre is :- ?

NARAYNA-MOVING CHARGES AND MAGNETISM-C.U.Q-KEY
  1. The magnetic field bar(dB) due to a small current element bar(dl) at a...

    Text Solution

    |

  2. For a given distance from a current element, the magnetic induction is...

    Text Solution

    |

  3. If we double the radius of a current carrying coil keeping the current...

    Text Solution

    |

  4. A current carrying coil is placed with its plane in the magnetic merid...

    Text Solution

    |

  5. A unit N- pole is placed on the axis of a circular coil carrying curre...

    Text Solution

    |

  6. If we double the radius of the coil keeping the current through it unc...

    Text Solution

    |

  7. Two concentric circular loops of radii r(1) and r(2) carry clockwise a...

    Text Solution

    |

  8. A length of wire carries a steady current. It is first bent to form a ...

    Text Solution

    |

  9. A charge 'e' moves round a circle of radius 'r' with a uniform speed '...

    Text Solution

    |

  10. An electron of charge e moves in a circular orbit of radius r round a ...

    Text Solution

    |

  11. A particle of charge q and mass m moves in a circular orbit of radius ...

    Text Solution

    |

  12. A loosly wound helix made of stiff wire is mounted vertically with the...

    Text Solution

    |

  13. Two very thin metallic wires placed along X and Y axes carry equal cur...

    Text Solution

    |

  14. A positively charged particle enters at the middle as shown in Figure....

    Text Solution

    |

  15. Net magnetic field at the centre of the circle O due to a current carr...

    Text Solution

    |

  16. Match the following and find the correct pairs. List -I a) Fleming...

    Text Solution

    |

  17. The reduction factor of a tangent galvanometer may be defined as the c...

    Text Solution

    |

  18. A tangent galvanometer is taken from equator to the north pole. During...

    Text Solution

    |

  19. In a tangent galvanometer, the circular coils is unwound and rewound ...

    Text Solution

    |

  20. The sensitivity of a tangent galvanometer increases if

    Text Solution

    |