Home
Class 12
PHYSICS
When the current changes from + 2A to -2...

When the current changes from + 2A to -2A in 0.05 s, an emf of 8 V is induced in a coil is co-efficient of self-induction of the coil is

A

0.2 H

B

0.4 H

C

0.8 H

D

0.1 H

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • SAMPLE PAPER-1 (SOLVED)

    FULL MARKS|Exercise Questions|28 Videos

  • SAMPLE PAPER-07 (SOLVED )

    FULL MARKS|Exercise (PART - IV)(Answer all the questions.)|10 Videos

  • SAMPLE PAPER-16 (UNSOLVED)

    FULL MARKS|Exercise PART-IV|10 Videos

Similar Questions

Explore conceptually related problems

Current in a circuit falls from 5.0 A to 0.0 A in 0.1s. If an average emf of 200 V is induced give an estimate of the self-inductance of the circuit.

A closely wound coil of radius 0.02 m is placed perpendicular to the magnetic field. When the magnetic field is change from 8000 T to 2000 T in 6 s, an emf of 44 V is induced. Calculate the number of turns in the coil.

An emf of 12V is induced when the current in the coil changes at the rate of 40AS^(-1). The coefficent of self induction of the coil is

An average induced emf of 0.20 V appears in a coil when the current in it is changed from 5.0 A in one direction to 5.0 A in the opposite direction in 0.20 s. find the self inductance of the coil.

FULL MARKS-SAMPLE PAPER-1 (SOLVED)-Questions
  1. When the current changes from + 2A to -2A in 0.05 s, an emf of 8 V is ...

    Text Solution

    |

  2. What is meant by Fraunhofer lines?

    Text Solution

    |

  3. Why steel is preferred in making Robot?

    Text Solution

    |

  4. State Lenz's law.

    Text Solution

    |

  5. Why do clouds appear white?

    Text Solution

    |

  6. Calculate the radius of(79)^(197) Au.

    Text Solution

    |

  7. Explain the need for a feedback circuit in a transistor oscillator.

    Text Solution

    |

  8. Show graphically the variation of electric field E (y-axis) due to a c...

    Text Solution

    |

  9. Write the applications of internet.

    Text Solution

    |

  10. Calculate the magnetic field inside a solenoid when the number of turn...

    Text Solution

    |

  11. Two cells each of 5V are connected in series across a 8 Omega resisto...

    Text Solution

    |

  12. Write a note on transformer.

    Text Solution

    |

  13. Discuss the alpha decay process with example.

    Text Solution

    |

  14. Obtain the expression for the energy stored in a parallel plate capaci...

    Text Solution

    |

  15. Explain any three recent advancements in medical technology.

    Text Solution

    |

  16. Two light sources with amplitudes 5 units and 3 units respectively int...

    Text Solution

    |

  17. An electron moves in a circular orbit with a uniform speed v. It produ...

    Text Solution

    |

  18. Give the construction and working of photo emissive cell.

    Text Solution

    |

  19. In the circuit shown in the figure, the input voltage Vi = +5 V, V(BE)...

    Text Solution

    |

  20. Obtain the expression for electric field due to an uniformly charge sp...

    Text Solution

    |

  21. Write any five properties of electromagnetic waves.

    Text Solution

    |