Home
Class 12
PHYSICS
A coil of cross-sectional area A having ...

A coil of cross-sectional area A having n turns is placed in uniform magnetic field B. When it is rotated with an angular velocity `omega`, the maximum e.m.f. induced in the coil will be :

A

`(3)/(2)nBaomega`

B

`3nBaomega`

C

`nBaomega`

D

`(1)/(2)nBa`

Text Solution

Verified by Experts

The correct Answer is:
C

Maximum emf: `epsilon_(0)=nBaomega`
Hence option (c) is correct
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    MODERN PUBLICATION|Exercise COMPETITION FILE (MULTIPLE CHOICE QUESTIONS BASED ON GIVEN PASSAGE)|7 Videos
  • ELECTROMAGNETIC INDUCTION

    MODERN PUBLICATION|Exercise COMPETITION FILE (ASSERTION REASON TYPE QUESTIONS)|10 Videos
  • ELECTROMAGNETIC INDUCTION

    MODERN PUBLICATION|Exercise COMPETITION FILE (MULTIPLE CHOICE QUESTIONS) (AIPMT/NEET & Other State Boards for Medical Entrance)|8 Videos
  • ELECTRIC CHARGES AND FIELDS

    MODERN PUBLICATION|Exercise Chapter Practice Test|15 Videos
  • ELECTROMAGNETIC WAVES

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|14 Videos

Similar Questions

Explore conceptually related problems

A coil having an area A_(0) is placed in a magnetic field which changes from B_(0) to 4B_(0) in a time interval t . The e.m.f. induced in the coil will be

A rectangular coil of single trun, having area A , rotates in a uniform magnetic field B with an angular velocity omega about an axis prependicular to the field. If initially the plane of the coil is perpendicular to the field, then the average induced emf when it has rotate through 90^(@) is

A coil of N turns having cross sectional area A, and resistance 'R' placed in transverse uniform magnetic fiel B . If it is rotates about its one of the diameter through an angle ' theta ' in time interval 't' Find following induced parameters in coil :-

A coil having an area 2 m^(2) is placed in a magnetic field which changes from 1 wb//m_(2) n interval of 2s. The e.m.f. induced in the coil is:

An emf induced in a coil rotating in a uniform magnetic field is given by

A rectangular coil of area vecA and number of turns n is placed in a uniform magnetic field vecB. If the coil carries a current I, then the torque acting on the coil is given by

(a) Explain the meaning of the term mutual inductance. Consider two concentric circular coils, one radius r_(1) and the other of radius r_(2)(r_(1) lt r_(2)) placed coaxially with centres coinciding with each other. Obtain the expression for the mutual inductance of the arrangement. (b) A rectangular coil of area A , having number of turns N is rotated at 'f' revoluation per second in a uniform magnetic field B , the field being perpendicular to the coil. Prove that maximum emf induced in the coil is 2pifNBA .

MODERN PUBLICATION-ELECTROMAGNETIC INDUCTION-COMPETITION FILE (MULTIPLE CHOICE QUESTIONS) (JEE (Main) & Other State Boards for Engineering Entrance)
  1. Two coils have a mutual inductance 0.005 H, The current changes in the...

    Text Solution

    |

  2. An aircraft with a wingspan of 40 m flies a speed of 1080 km hr(1) in ...

    Text Solution

    |

  3. A coil of cross-sectional area A having n turns is placed in uniform m...

    Text Solution

    |

  4. The figure shows a square loop L of side 5 cm which is connected to a ...

    Text Solution

    |

  5. The self-inductance of an air core solenoid of 100 turns iz 1 mH. The ...

    Text Solution

    |

  6. A 100 turns coil of area of cross section 200 cm^(2) having 2 Omega re...

    Text Solution

    |

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

    Text Solution

    |

  8. A metallic rod of length 'l' is tied to a string of length 2l and made...

    Text Solution

    |

  9. A circular loop of radius 0.3 cm lies parallel to amuch bigger circula...

    Text Solution

    |

  10. Figure shows a circular area of radius R where uniform magnetic vec B ...

    Text Solution

    |

  11. A coil of circular cross - section having 1000 turns and 4cm^(2) face ...

    Text Solution

    |

  12. When current in a coil changes from 5 A to 2 A in 0.1 s, average volta...

    Text Solution

    |

  13. A conducting metal circular-wire-loop of radius r is placed perpendicu...

    Text Solution

    |

  14. A jet plane having a wing-span of 25 m is travelling horizontally towa...

    Text Solution

    |

  15. A fighter plane of length 20 m, wing span (distane from tip of one win...

    Text Solution

    |

  16. A small loop is kept inside a bigger loop as shown in figure. Both the...

    Text Solution

    |

  17. Which of the following have dimensions of frequency?

    Text Solution

    |

  18. A constant current is maintained in a resistive solenoid having iron r...

    Text Solution

    |

  19. Copper wire is used to make a circular ring which is placed completely...

    Text Solution

    |

  20. Two resistive solenoids are made of same geometry and same number of t...

    Text Solution

    |