Home
Class 12
PHYSICS
If the angular velocity of coil of an ac...

If the angular velocity of coil of an ac dynamo is doubled ,how would the emf produced change?

Text Solution

Verified by Experts

The correct Answer is:
doubled
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    CHHAYA PUBLICATION|Exercise EXERCISE ( Short Answer Type-I)|18 Videos
  • ALTERNATING CURRENT

    CHHAYA PUBLICATION|Exercise EXERCISE ( Short Answer Type-II)|3 Videos
  • ALTERNATING CURRENT

    CHHAYA PUBLICATION|Exercise EXERCISE (Multiple Choice Question)|32 Videos
  • CHHAYA PUBLICATION|Exercise EXAMPLE|1 Videos
  • ATOM

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|18 Videos

Similar Questions

Explore conceptually related problems

If the area of the coil of an ac dynamo is halved, how would the emf generated change?

If the diameter of the objective of a telescope is doubled, how will its resolving power change?

If the frequency of an circuit is increased, how would the reactance of an inductor change?

If the frequency of an circuit is increased, how would the reactance of a capacitor change?

IF the number of gas molecules in a container in doubled, how will the pressure and the total kinetic energy of the gas molecules of that container change?

A conducting wire of length l is rotating with angular velocity w in a magnetic field B perpendicular to it. Prove that the induced e.m.f. at the two ends of the conducting wire is e = 1/2 Bwl^2 .

If the supply voltage drop from 220 V to 200 V , what would be percentage reduction in heat produced by a 220V - 1000W heater ? Neglect the change of resistance. If the change of resistance is taken into consideration would the reduction of heat produced be smaller or larger than the previously calculated value ? Explain.

A gramaphone record is revolving with an angular velocity omega . A coin is placed at a distance r from the centre of the record: The static coefficient of friction is mu . What will be the value of r for that the coil will revolve with the record?

How would you carry out the following changes:

CHHAYA PUBLICATION-ALTERNATING CURRENT -EXERCISE (Very Short Answer Type)
  1. What is the reactance of pure resistances in an ac circuit?

    Text Solution

    |

  2. If an LCR circuit is connected to a dc source , what will be the curre...

    Text Solution

    |

  3. What will be the reactance if a current of frequency f flows through a...

    Text Solution

    |

  4. What will be the reactance if a current of frequency f flows through a...

    Text Solution

    |

  5. If the frequency of an circuit is increased, how would the reactance o...

    Text Solution

    |

  6. If the frequency of an circuit is increased, how would the reactance o...

    Text Solution

    |

  7. In an LR circuit, the alternating currentthe alternating emf by a cert...

    Text Solution

    |

  8. In a CR circuit, the alternating current the alternating emf by a cert...

    Text Solution

    |

  9. In an alternating series LCR circuit ,what is the phase difference bet...

    Text Solution

    |

  10. When does LCR series circuit have minimum impedance?

    Text Solution

    |

  11. What is the reactance of a capacitor of capacitance C at fHz?

    Text Solution

    |

  12. What is the power factor of a circuit having a pure resistance only?

    Text Solution

    |

  13. What is the power dissipated in an ac circuit in which voltage and cur...

    Text Solution

    |

  14. What is the natural frequency of an LC oscillator?

    Text Solution

    |

  15. Indicate the change in emf produced by an ac dynamo in the following c...

    Text Solution

    |

  16. Indicate the change in emf produced by an ac dynamo in the following c...

    Text Solution

    |

  17. If the area of the coil of an ac dynamo is halved, how would the emf g...

    Text Solution

    |

  18. If the angular velocity of coil of an ac dynamo is doubled ,how would ...

    Text Solution

    |

  19. By what factor would the output voltage of an ac generator change, if ...

    Text Solution

    |

  20. The turns ratio of an ideal transformer is 4:1 what will be the curren...

    Text Solution

    |