Home
Class 12
PHYSICS
An aluminium ring B faces an electromagn...

An aluminium ring `B` faces an electromagnet `A`. The current `I` through `A` can be altered

A

If `i` increases `A` will repel `B`

B

If `i` increaes `A` will attracted `B`

C

If `i` decreases `A` will attract `B`

D

If `i` decreases `A` will repel `B`

Text Solution

Verified by Experts

The correct Answer is:
A, C
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CURRENT IN CONDUCTORS

    D MUKHERJEE|Exercise All Questions|79 Videos
  • ELECTROSTATICS

    D MUKHERJEE|Exercise All Questions|102 Videos

Similar Questions

Explore conceptually related problems

Two circular coils A and B are facing each other as shown in figure. The current i through A can be altered

Answer the following questions. You can make an electromagnet by wrapping coil around the nail and magnetise it by flowing a current through the coil. Can you use an aluminium nail instead of an iron nail? Why?

A ring of the radius R is placed in the y - z plane and it carries a current i. The conducting wires which are used to supply the current to the ring can be assumed to be vary long and are placed as shown in the figure. The magnitude of the magnetic field at the centre of the ring A is

Two coils A and B are separated by a certain distance. If a current of 4 A flows through A, a magnetic flux of 10^(-3)Wb passes through B (no current through B). If no current passes through A and a current of 2 A passes through B, then the flux through A is.

There are two coils A and B separated by some distance. If a current of 4 A flows through A, a magnetic flux of 2 X 10^(-2) Wb passes through B (no current through B). If no current passes through A and a current of 2 A passes through B, what is the flux through A?

There are two coils A and B seperated by some distance. If a current of 2 A flows through A, a magnetic flux of 10^(-2) Wb passes through B (no current through B). If no current passes through A and a current 1 A passes through B, what is the flux through A?

D MUKHERJEE-ELECTROMAGNETISM-All Questions
  1. A conductor ABCDE, shaped as shown, carries current I. It is placed in...

    Text Solution

    |

  2. AB and CD are smooth, parallel, horizontal rails on which a conductor ...

    Text Solution

    |

  3. Two long, thin parallel conductors, separated by a distance d, carryin...

    Text Solution

    |

  4. A current-carrying ring is placed in a magnetic field. The direction o...

    Text Solution

    |

  5. AB and CD are smooth, parallel rails, separated by a distance L and in...

    Text Solution

    |

  6. A flat coil carrying a current has a magnetic moment vecmu. It is plac...

    Text Solution

    |

  7. A flat coil carrying a current has a magnetic moment mu. It is placed ...

    Text Solution

    |

  8. The magnetic flux (phi) linked with the coil depends on time t as phi=...

    Text Solution

    |

  9. An aluminium ring B faces an electromagnet A. The current I through A ...

    Text Solution

    |

  10. A small magnet M is allowed to fall through a fixed horizontal conduct...

    Text Solution

    |

  11. The magnetic flux linked with a coil is phi and the emf induced in it ...

    Text Solution

    |

  12. The counductor AD moves to the right in a uniform magnetic field direc...

    Text Solution

    |

  13. A square loop ABCD of edge a moves to the right with a velocity v para...

    Text Solution

    |

  14. The loop shown moves with a velocity v in a uniform magnetic field of ...

    Text Solution

    |

  15. The magnitude of the earth's magnetic field at the north pole is B(0) ...

    Text Solution

    |

  16. A vertical conducting ring of radius R falls vertically in a horizonta...

    Text Solution

    |

  17. Two conducting rings of radii r and 2r move in apposite directions wit...

    Text Solution

    |

  18. A conducting disc of radius r spins about its axis an angular velocity...

    Text Solution

    |

  19. A flat coil, C, of n turns, area A and resistance R, is placed in a un...

    Text Solution

    |

  20. The SI unit of inductance, the henry can be written as

    Text Solution

    |