Home
Class 12
PHYSICS
A conducting circular loop is placed in ...

A conducting circular loop is placed in a uniform magnetic field, `B=0.025T` with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of `1 mms^(-1)`. The induced emf when the radius is `2 cm` is

A

`2pi mu V `

B

`pi mu V`

C

`(pi)/(2)mu V`

D

`2 mu V`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    AAKASH INSTITUTE|Exercise ASSIGNMENT(SECTION -D) Assertion-Reason type Question)|15 Videos
  • ELECTROMAGNETIC INDUCTION

    AAKASH INSTITUTE|Exercise ASSIGNMENT(SECTION - B) (OBJECTIVE TYPE QUESTIONS)|11 Videos
  • ELECTRIC CHARGES AND FIELDS

    AAKASH INSTITUTE|Exercise SECTION -J(Aakash Challengers Questions)|5 Videos
  • ELECTROMAGNETIC WAVES

    AAKASH INSTITUTE|Exercise ASSIGNMENT SECTION - D Assertion-Reason Type Questions|25 Videos

Similar Questions

Explore conceptually related problems

A conducting circular loop is placed is a uniform magnetic field B =0.20 T with its plane perpendicualr to the field . Somehow, the radius of the loop starts shrinking at a constant rate of 1.0 mm s^(-1). Find the induced emf in the loop at an instant when the radius is 2 cm.

A conducting circular loop is placed in a uniform magnetic field 0.04T with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at 2mm//sec . The induced emf in the loop when the radius is 2cm is

A conducing circular loop is placed in a uniform magnetic field of 0.02 T, woth its plane perpendicular to the field. If the redius of the loop starts shrinking at a constant rate of 1.0 mm//s , then find the emf induced in the loop, at the instant when radius is 4 cm.

A conduction circular loop is placed in a uniform magnetic field 0.02T with its place normal to the field . The radius of loop starts shrinking at a rate of 1.0 mm//sec . Then induced emf in the loop at an instant when the radius is 2 cm :-

A conducting square loop is placed in a magnetic field B with its plane perpendicular to the field. Now the sides of the loop start shrinking at a constant rate alpha. the induced emf in the loop at an instant when its side is a is

AAKASH INSTITUTE-ELECTROMAGNETIC INDUCTION-ASSIGNMENT(SECTION -C) Previous Years Questions
  1. A wire loop is rotated in magneitc field. The frequency of change of d...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  6. A long solenoid has 500 turns. When a current of 2A is passed through ...

    Text Solution

    |

  7. What is the value of inductance L for which the current is a maximum i...

    Text Solution

    |

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

    Text Solution

    |

  9. A metal ring is held horizontally and bar magnet is dropped through th...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  12. A conductor of 3 m in length is moving perpendicularly to magnetic fie...

    Text Solution

    |

  13. In a circular conducting coil, when current increases from 2A to 18A i...

    Text Solution

    |

  14. Self-inductance of a coil is 2mH, current through this coil is, I=t^(2...

    Text Solution

    |

  15. When the number of turns and the length of the solenoid are doubled ke...

    Text Solution

    |

  16. The time constant of L-R circuit is doubled if

    Text Solution

    |

  17. Two neighbouring coils A and B have a mutual inductance of 20 mH. The ...

    Text Solution

    |

  18. The self inductance L of a solenoid depends on the number of turns per...

    Text Solution

    |

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

    Text Solution

    |

  20. A transfomer has 500 primary tunrs and 10 secondary turns. If the seco...

    Text Solution

    |