Home
Class 11
PHYSICS
In the figure magnetic energy stored in ...

In the figure magnetic energy stored in the coil is

A

0

B

`oo`

C

25 joules

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
`U=1/2 xxLI^(2)`
`=1/2 xx2xx(10/2)^(2)`
`=1xx5^(2) =25 J`
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY AND VISCOCITY

    RESONANCE|Exercise Advanced Level Problems|9 Videos

  • ELECTROSTATICS

    RESONANCE|Exercise Exercise|52 Videos

Similar Questions

Explore conceptually related problems

Magnetic field energy stored in a coil is

A coil of self-inductance L is placed in an external magnetic field (no current flows in the coil). The total magnetic flux linked with the coil is varphi . The magnetic field energy stored in the coil is

Consider the situation of the previous problem. Find the average electric field energy stored in the capacitor and the average magnetic field energy stored in the coil.

In a series LCR circuit with an ac source of 50 V,R=300 Omega ,frequency v=50/piHz .The average electric field energy, stored in the capacitor and average magnetic energy stored in the coil are 25 mJ and 5 mJ respectively.The RMS current in the circuit is 0.10 A .Then find

A coil of inductance 1 H and resistance 10Omega is connected to a resistanceless battery of emf 50 V at time t=0 . Calculate the ratio of rthe rate which magnetic energy is stored in the coil to the rate at which energy is supplied by the battery at t=0.1s .

A coil having an inductance L and a resistance R is connected to a battery of emf E . Find the time taken for the magnetic energy stored in the circuit to change from one fourth of the steady-state value.

The self inductance and resistance of coil are 5H and 20 Omega respectively . On applying an e.m.f . Of 100 V on it , the magnetic potential energy stored in the coil will be __

If a current of 2A give rise a magnetic flux of 5xx10^(-5) weber/turn through a coil having 100 turns , then the magnetic energy stored in the medium surrounding by the coil is :-

Derive an expression for the total magnetic energy stored in two coils with inductances L_(1) and L_(2) and mutual inductance M , when the currents in the coils are I_(1) and I_(2) , respectively.

At t=0 , switch S closed. Find the ratio of the rate at which magnetic energy stored in the coil to the rate at which energy is supplied by the battery at time t=tau=L//R .

RESONANCE-ELECTROMAGNETIC INDUCTION-Exercise
  1. An electron is moving near to a conducting loop then the induced curre...

    Text Solution

    |

  2. The magnetic flux linked with a coil, in webers, is given by the equat...

    Text Solution

    |

  3. A metallic conductor of 1m length is rotated verically its one end at ...

    Text Solution

    |

  4. The resistance of a coil is 5 ohm and a current of 0.2A is induced in ...

    Text Solution

    |

  5. If the length and area of cross-section of an inductor remain same but...

    Text Solution

    |

  6. Self-inductance of a solenoid depend on-

    Text Solution

    |

  7. When current flowing in a coil changes from 3A to 2A in one millisecon...

    Text Solution

    |

  8. In the figure magnetic energy stored in the coil is

    Text Solution

    |

  9. The self inductance of a solenoid of length L, area of cross-section A...

    Text Solution

    |

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

    Text Solution

    |

  11. The self-inductances of two identical coils are 0.1H. They are wound o...

    Text Solution

    |

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

    Text Solution

    |

  13. A conducting circular loop is placed in a uniform magnetic field, B=0....

    Text Solution

    |

  14. Which of the following is proportional to energy density in magnetic f...

    Text Solution

    |

  15. When two co-axial coils having same current in same direction are brin...

    Text Solution

    |

  16. A magnetic field can be produced by

    Text Solution

    |

  17. A bar magnet is dropped between a current carrying coil. What would be...

    Text Solution

    |

  18. Lenz's law gives:

    Text Solution

    |

  19. Statement 1: Electric field produced by changing magnetic field is non...

    Text Solution

    |

  20. Statement I: Two coaxial conducting rings of different radii are place...

    Text Solution

    |