Home
Class 12
PHYSICS
Two identicaly induction coils each of i...

Two identicaly induction coils each of inductance `L` joined in series are placed very close to each other such that the winding direction of one is exactly opposite to that of the other, what is the net inductance?

A

`L^(2)`

B

2L

C

L/2

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
D

When two inductace coil are joined series, such that the winding of one is exactly opposite to each other the emf produced in the two coils are out of phase such that they cancel out.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    DISHA PUBLICATION|Exercise EXERCISE - 2 : Concept Applicator|29 Videos
  • ELECTROMAGNETIC INDUCTION

    DISHA PUBLICATION|Exercise EXERCISE - 2 : Concept Applicator|29 Videos
  • ELECTRIC CHARGES AND FIELDS

    DISHA PUBLICATION|Exercise Exercise - 2 : Concept applicator|24 Videos
  • ELECTROMAGNETIC WAVES

    DISHA PUBLICATION|Exercise Exercise - 2 : Concept Applicator|30 Videos

Similar Questions

Explore conceptually related problems

Lenses Placed Very Close To Each Other

Two identical coils each of self-inductance L , are connected in series and are placed so closed to each other that all the flux from one coil links with the other. The total self-inductance of the system is

When two genes are situated very closed to each other in a chromosome

Two pure inductors each of self inductance L are connected in series, the net inductance is

Two inductors each of inductance L are joined in parallel. Their equivalent inductance is

Two pure inductors each of self-inductance L are connected in parallel but are well separted from each other. The total inductance is

Two coil are placed close to each other. The mutual inductance of the pair of coils depends upon.

" Two inductors each of inductance L are joined in parallel.Their equivalent inductance is "

DISHA PUBLICATION-ELECTROMAGNETIC INDUCTION -EXERCISE - 1 : Concept Builder
  1. Aconductor of lengfht 0.4 m is moving with a speed of 7 m/s perpendic...

    Text Solution

    |

  2. A wire of length 1 m is moving at a speed of 2 ms^(-1) perpendicular t...

    Text Solution

    |

  3. Two identicaly induction coils each of inductance L joined in series ...

    Text Solution

    |

  4. A thin wire of length 2m is perpendicular to the xy plane. It is moved...

    Text Solution

    |

  5. A rectangular coil of single trun, having area A , rotates in a unifor...

    Text Solution

    |

  6. The two rails of a railway track, insulated from each other and the gr...

    Text Solution

    |

  7. In fig, CODF is a semicircular loop of a conducting wire of resistance...

    Text Solution

    |

  8. The mutual inductance of a pair of coils, each of N turns, is M henry....

    Text Solution

    |

  9. A coil has 2000 turns and area of 70cm^(2). The magnetic field perpen...

    Text Solution

    |

  10. When the current in a coil charges from 2A to 4A in 0.05 s, emf of 8 v...

    Text Solution

    |

  11. A small square loop of wire of side l is placed inside a large square ...

    Text Solution

    |

  12. Two circular coils can be arranged in any of the three situations show...

    Text Solution

    |

  13. Two coils, one primary of 500 turns and one secondary of 25 turns, are...

    Text Solution

    |

  14. Two circular coils, one of smaller radius r(1) and the other of very l...

    Text Solution

    |

  15. A long solenoid has 500 turns. When a current of 2A is passed through ...

    Text Solution

    |

  16. A metal disc of radius 100 cm is rotated at a constant angular speed o...

    Text Solution

    |

  17. A copper disc of radius 0.1 m rotates about its centre with 10 revolut...

    Text Solution

    |

  18. A square loop of side a is rotating about its diagonal with angular ve...

    Text Solution

    |

  19. A wire loop is rotated in a uniform magnetic field about an an axis pe...

    Text Solution

    |

  20. In an A.C. generator, when the plane of the armature is perpendicular ...

    Text Solution

    |