Home
Class 12
PHYSICS
A wire loop is rotated in magneitc field...

A wire loop is rotated in magneitc field. The frequency of change of direction of the induced e.m.f. is.

A

twice per revolution

B

four times per revolution

C

six times per revolution

D

once per revolution

Text Solution

Verified by Experts

The correct Answer is:
D
Once per revolution
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY

    NIKITA PUBLICATION|Exercise MCQ|314 Videos

  • ELECTRONS AND PHOTONS

    NIKITA PUBLICATION|Exercise MCQs|162 Videos

Similar Questions

Explore conceptually related problems

The direction of the induced e.m.f. is determined by

The cause of induced e.m.f is

when the wire loop is rotated in the magnetic field between the poles of a magnet the direction of emf changes once in every

Choose the correct option: A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each:

When the wire loop is rotated in the magnetic field between the poles of a magnet the frequency of emf is

NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
  1. An alternating voltage E=200sqrt(2)sin(100t) is connected to a 1 micro...

    Text Solution

    |

  2. Same current is flowing in two alternating circuits. The first circuit...

    Text Solution

    |

  3. In a circuit, the current lags behind the voltage by a phase differenc...

    Text Solution

    |

  4. Average power in the L-C-R circuit depends upon

    Text Solution

    |

  5. A transformer is having 2100 turns in primary and 4200 turns is second...

    Text Solution

    |

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

    Text Solution

    |

  7. When the current changes from +2A to -2A in 0.05s, and emf of 8B is in...

    Text Solution

    |

  8. An alternating voltage E = 200sqrt(2) sin (100 t)V is applied to a 2 m...

    Text Solution

    |

  9. In a series LCR circuit, at resonance, power factor is …….. .

    Text Solution

    |

  10. In series LCR circuit at resonance,

    Text Solution

    |

  11. The self inductane of coil of 400 turns is 8 mH. If current of 5 mA f...

    Text Solution

    |

  12. In LCR series circuit an ac emf of 2 volt and frequency 50 Hz is appli...

    Text Solution

    |

  13. A coil of self-inductance L is connected in series with a bulb B and a...

    Text Solution

    |

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

    Text Solution

    |

  15. If 'N' is the number of turns in a coil, the value of self inductance ...

    Text Solution

    |

  16. In LCR series circuit , an alternating emf e and current i are given b...

    Text Solution

    |

  17. In electromagnetic wave , according to Maxwell , changing electric fie...

    Text Solution

    |

  18. Same current is flowing in two alternating circuits. The first circuit...

    Text Solution

    |

  19. Two coils A and B have mutual inductance 2xx10^(-2) Henry if the cur...

    Text Solution

    |

  20. The capacity of a parallel plate air capacitor is 2 mu F and voltag...

    Text Solution

    |