Home
Class 12
PHYSICS
The current passing through a choke coil...

The current passing through a choke coil of `5` henry is decreasing at the rate of `2 ampere//sec`. The e.m.f. developing across the coil is

A

`10 V`

B

`-10V`

C

`2.5 V`

D

`-2.5 V`

Text Solution

Verified by Experts

The correct Answer is:
A
Given `(di)/(dt)=2A//sec.,L=5H`
`:.e=L(di)/(dt)=5xx2=10V`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    A2Z|Exercise Inductor Circuits|31 Videos

  • ELECTROMAGNETIC INDUCTION

    A2Z|Exercise Applications Of Emi|58 Videos

  • ELECTROMAGNETIC INDUCTION

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • ELECTRIC POTENTIAL & CAPACITANCE

    A2Z|Exercise Section D - Chapter End Test|29 Videos

  • ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

The current passing through a choke coil of inductance 4 Henry is decreasing at the rate of 3 amp//sec . The e.m.f developed across the coil is

A current through a choke coil of self inductance 2H decreases at the rate of 0.5A//s . The e.m.f. developed across the coil is

In a coil, L=5H , current changes at the rate of 2 ampere per second. The induced

The current in a coil of inductance 5H decreases at the rate of 2A//a . The induced e.m.f. is

When the current in a certain inductor coil is 5.0 A and is increasing at the rate of 10.0 A//s ,the magnitude of potential difference across the coil is 140 V .When the current is 5.0 A and decreasing at the rate of 10.0 A//s ,the potential difference is 60 V .The self inductance of the coil is :

The flux linked with a coil is 0.8 Wb when a 2 A current is flowing through it. If this current begins to increases at the rate of 400 A//s , the induced emf in the coil will be

An e.m.f. of 12 "volts" is induced in a given coil when the current in it changes at the rate of 48 amperes per minute. The self-inductance of the coil is

The self-induced e.m.f in a 0.1H coil when the current in it is changing at the rate of 200 ampere//second is

A2Z-ELECTROMAGNETIC INDUCTION-Motional And Rotational Emf
  1. An e.m.f. of 5 "volt" is produced by a self-inductance, when the curre...

    Text Solution

    |

  2. Calculate the energy stored in an inductor of inductance 50 mH when a ...

    Text Solution

    |

  3. The current passing through a choke coil of 5 henry is decreasing at t...

    Text Solution

    |

  4. Average energy stored in a pure inductance L when current i flows thro...

    Text Solution

    |

  5. A solenoid has 2000 turns wound over a length of 0.3 m. Its cross-sect...

    Text Solution

    |

  6. A coil is wound as a transformer of rectangular cross section. If all ...

    Text Solution

    |

  7. Two coils of self-inductance L(1) and L(2) are placed closed to each o...

    Text Solution

    |

  8. The coefficient of self-inductance of a solenoid is 0.18 mH. If a crud...

    Text Solution

    |

  9. In a transformer , the coefficient of mutual inductance between the pr...

    Text Solution

    |

  10. When the current in a coil changeg from 8 amperes to 2 amperes in 3xx1...

    Text Solution

    |

  11. The mutual inductance between two coils is 1.25 henry. If the current ...

    Text Solution

    |

  12. A coil of wire of a certain radius has 600 turns and a self-inductance...

    Text Solution

    |

  13. When the number of turns in a coil is doubled without any change in th...

    Text Solution

    |

  14. The average e.m.f. induced in a coil in which the current changes from...

    Text Solution

    |

  15. If a current of 3.0 amperes flowing in the primary coil is reduced to...

    Text Solution

    |

  16. An e.m.f. of 12 "volts" is induced in a given coil when the current in...

    Text Solution

    |

  17. A closely wound coil of 100 turns and area of cross-section 1cm^(3) ha...

    Text Solution

    |

  18. Two circuits have coefficient of mutual induction of 0.09 henry. Avera...

    Text Solution

    |

  19. When current in a coil changes to 2 ampere from 8 ampere in 3xx10^(-3)...

    Text Solution

    |

  20. The inductance of a coil is 60muH. A current in this coil increase fro...

    Text Solution

    |