Home
Class 12
PHYSICS
A metalic ring is dropped down, keeping ...

A metalic ring is dropped down, keeping its plane perpendicular to a constant and horizontal magnetic field. The ring enters the region of mangetic fied at `t=0` and completely emerges out `t= Ts`. The current in the ring varies as:

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
b
Promotional Banner

Topper's Solved these Questions

  • ELECTRO MAGNETIC INDUCTION

    MOTION|Exercise EXERCISE-4| Section B (Prevous Years Problems )|29 Videos
  • ELECTRO MAGNETIC INDUCTION

    MOTION|Exercise EXERCISE-3 (Assertion & Reasoning)|18 Videos
  • Electrical Instrument

    MOTION|Exercise EXERCISE -3|16 Videos
  • ELECTRO MAGNETIC WAVES

    MOTION|Exercise EXERCISE - 3 (SECTION - B)|8 Videos

Similar Questions

Explore conceptually related problems

A conducting ring is placed in a uniform magnetic field with its plane perpendicular to the field . An emf is induced in the ring if

A conducting light string is wound on the rim of a metal ring of radius r and mass m . The free end of the string is fixed to the ceiling. A vertical infinite smooth conducting plane is always tangent to the ring as shown in the figure. A uniform magnetic field Bis applied perpendicular to the plane of the ring. The ring is always inside the magnetic field. The plane and the strip are connected by a resistance R . When the ring is released, find a. the curent in the resistance R as as function of time. b. the terminal velocity of the ring.

A metallic ring of area 25 cm^(2) is placed perpendicular to a magnetic field of 0.2 T .Its is removed from the field in 0.2 s .Find the average emf produced in the ring during this time.

A conducting ring of mass 2 kg and radius 0.5 m is placed on a smooth horizontal plane. The ring carries a current . A horizontal magnetic field B = 10T is switched on at time t = 0 as shown in figure. The initial angular acceleration of the ring will be:

A ring rotates with angular velocity omega about an axis perpendicular to the plane of the ring passing through the center of the ring.A constant magnetic field B exists parallel to the axis.Find the emf induced in the ring.

A ring of mass m and radius r is rotated in uniform magnetic field B which is perpendicular to the plane of the loop with constant angular velocity omega_(0) .Find the net ampere force on the ring and the tension developed in the ring if there is a current i in the ring.Current and rotation both are clockwise.

A vertical conducting ring ogradius R falls vertically in a horizontal magnetic field of magnitude B . The direction of B is perpendicular to the plane of the ring. When the speed of the ring is v,

MOTION-ELECTRO MAGNETIC INDUCTION-EXERCISE-4| Section A (Prevous Years Problems )
  1. A Conducting ring of radius 1 meter is placed in an uniform magnetic f...

    Text Solution

    |

  2. A magnet is made to oscillate with a particular frequency, passimg thr...

    Text Solution

    |

  3. A metalic ring is dropped down, keeping its plane perpendicular to a c...

    Text Solution

    |

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

    Text Solution

    |

  5. The primary and secondary coils of a transmformer have 50 and 1500 tur...

    Text Solution

    |

  6. A transformer is used to light a 100 W and 110 V lamp from a 220V main...

    Text Solution

    |

  7. The primary and secondary coils of a transmformer have 50 and 1500 tur...

    Text Solution

    |

  8. A transformer is used to light a 100 W and 110 V lamp from a 220V main...

    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 turns. When a current of 2A is passed through ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  14. A solenoid of radius R and length L has a current I = I​0 cosωt. The v...

    Text Solution

    |

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

    Text Solution

    |

  16. The current (I) in the inductance is varying with time acroding to the...

    Text Solution

    |

  17. In a coil of resistance 10 ohm , the induced current developed by chan...

    Text Solution

    |

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

    Text Solution

    |

  19. A transformer having efficiency of 90% is working on 200 V and 3 kW po...

    Text Solution

    |

  20. The time constant of a circuit is 10 sec , when a resistance of 10 Ome...

    Text Solution

    |