Home
Class 12
PHYSICS
A coil of resistance 400Omega is placed ...

A coil of resistance `400Omega` is placed in a magnetic field. If the magnetic flux `phi` (wb) linked with the coil varies with time `t` (sec) as `f=50t^(2)+4`, the current in the coil at `t=2` sec is

A

`0.5 A`

B

`0.1 A`

C

`2A`

D

`1 A`

Text Solution

Verified by Experts

The correct Answer is:
a

CBSE AIPMT 2012
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise All Questions|72 Videos
  • ELECTRONS AND PHOTONS

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise All Questions|61 Videos
NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-ELECTROMAGNETIC INDUCTION-PHYSICS
  1. A thin semicircular conducting ring of radius R is falling with its pl...

    Text Solution

    |

  2. A wire loop is rotated in magneitc field. The frequency of change of d...

    Text Solution

    |

  3. A coil of resistance 400Omega is placed in a magnetic field. If the ma...

    Text Solution

    |

  4. The current (I) in the inductance is varying with time according to th...

    Text Solution

    |

  5. The current I and a coil varies with time as shows in the figure .Tg...

    Text Solution

    |

  6. A conducting circualr loop is placed in a unifrom magentic field ,...

    Text Solution

    |

  7. A rectangular, a square , a circular and an elliptical loop, all in th...

    Text Solution

    |

  8. A conducting circular loop is placed in a uniform magnetic field 0.04T...

    Text Solution

    |

  9. A circular disc of radius 0.2 m is placed in a uniform magnetic fied...

    Text Solution

    |

  10. A long solenoid has 500 turne. When a current of 2 A is passed thrioug...

    Text Solution

    |

  11. Two coils of self-inductance 2mH and 8 mH are placed so close togethe...

    Text Solution

    |

  12. As a result of change in the magnetic flux linked to the closed loop s...

    Text Solution

    |

  13. The magnetic flux through a circuit of resistance R changes by an amou...

    Text Solution

    |

  14. In an inductor of self-inductance L=2 mH, current changes with time ac...

    Text Solution

    |

  15. Two coils have a mutual inductance 0.005 H. The current changes in the...

    Text Solution

    |

  16. A varying current ina coils chagre from 10 A to zero in 0.5 s .If the...

    Text Solution

    |

  17. Aconductor of lengfht 0.4 m is moving with a speed of 7 m/s perpendic...

    Text Solution

    |

  18. If 'N' is the number of turns in a coil, the value of self inductance ...

    Text Solution

    |

  19. What id the self -inductance of a coil which product 5 V when the cur...

    Text Solution

    |

  20. The total charge induced in a conducting loop when it is moved in magn...

    Text Solution

    |