Home
Class 12
PHYSICS
The self-inductance of a coil increases ...

The self-inductance of a coil increases when the coil is wound on a soft iron core, because ....

A

soft iron has a very high permittivity.

B

soft iron has a very low permittivity.

C

soft iron has a very high permeability.

D

soft iron has a very low permeability.

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    KUMAR PRAKASHAN|Exercise Section D MCQs (MCQs asked in Competitive Exams )|38 Videos

  • ELECTROMAGNETIC INDUCTION

    KUMAR PRAKASHAN|Exercise Section C Ncert Exemplar Solution (Long Answer )|11 Videos

  • ELECTRIC CHARGES AND FIELDS

    KUMAR PRAKASHAN|Exercise SECTION D MCQS ASKED IN COMPETITIVE EXAMES (MCQS AKSED IN BOARD EXAM AND GUJCET)|14 Videos

  • ELECTROMAGNETIC WAVES

    KUMAR PRAKASHAN|Exercise BOARD.S QUESTION PAPER MARCH - 2020 (PART - B) SECTION - C|5 Videos

Similar Questions

Explore conceptually related problems

The mutual inductance M_12 of coil 1 with respect to coil 2

What is the self inductance of a coil which produces, self induced emf of 5V, when the current changes from 3A to 2A in one millisecond ?

Two identical coils, each with self inductance L, are connected in series and kept very close. Turns wound in these coils have opposite sense of winding. Then resultant inductance of this connection is ......

Mutual inductance of two coils can be increased by _____

When current passing through a coil increases, direction of induced emf is

The self inductance L of a solenoid of length l and area of cross-section A, with a fixed number of turns N increases as

A coil of self inductance of 1H and resistance 200 Omega is connected to an A.C. source of frequency 200/pi Hz. The phase difference between voltage and current will be ...

The mutual inductance of the system of two coils is 5 mH. The current in the first coil varies according to the equation I = I_0 sinomegat , where I_0 = 10 A and omega = 100pi "rad s"^(-1) . The value of maximum induced emf in the second coil is ____

The self inductance angle of a solenoid of length and are of cross section A with a fixed number of turns N increases as,

KUMAR PRAKASHAN-ELECTROMAGNETIC INDUCTION-Section D MCQs (From DARPAN Based on Textbook )
  1. Self inductance of straight conducting wire is

    Text Solution

    |

  2. When current is increasing in the coil, the direction of induced emf i...

    Text Solution

    |

  3. The self-inductance of a coil increases when the coil is wound on a so...

    Text Solution

    |

  4. The frequency of A.C. mains in India is ….. Hz.

    Text Solution

    |

  5. Energy stored in the choke coil is in the form of

    Text Solution

    |

  6. The self-inductance of two solenoids A and B having equal length are s...

    Text Solution

    |

  7. One electric generator produces power at 220 V potential difference. I...

    Text Solution

    |

  8. In one A.C. generator, brushes connected with slip rings become positi...

    Text Solution

    |

  9. Working principle of electric motor is to convert …...

    Text Solution

    |

  10. Voltage obtained in one A.C. generator V=V0 cos omegat . If V0 = 10 vo...

    Text Solution

    |

  11. A circular coil with radius 10 cm and 10 no. of tightly wound identica...

    Text Solution

    |

  12. A generator produces a voltage that is given by V = 240 sin 120t, wher...

    Text Solution

    |

  13. If an A.C. current of frequency 50 Hz is flowing through a conducting ...

    Text Solution

    |

  14. A coil having N turns and area A is rotating in uniform magnetic field...

    Text Solution

    |

  15. In an AC generator, the brushes in contact with the step rings alterna...

    Text Solution

    |

  16. The equation of A.C. voltage is given by V = 158 sin 200pit. The value...

    Text Solution

    |

  17. A coil with resistance 8 Omega and having 8 turns is connected with a...

    Text Solution

    |

  18. For the situation shown in the figure, what should be the value of for...

    Text Solution

    |

  19. For one coil, kept in 1T external magnetic field, current passing thro...

    Text Solution

    |

  20. As shown in figure a bar magnet suspended by a conducting spring is ma...

    Text Solution

    |