Home
Class 12
PHYSICS
If the frequency of an alternating emf b...

If the frequency of an alternating emf be 50 Hz, how many times the direction of emf will be reversed per second?

Text Solution

Verified by Experts

The correct Answer is:
100
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

The frequency of an alternating current is 50 Hz .In what time will the value of current rise to rms value from zero?

If the frequency of an SHM is 200 Hz, then what will be its time period?

The frequency of a particle, vibrating in a medium is f Hz . How many waves are generated in 5 seconds in the meduim?

The frequency of a particle vibrating in a medium is f Hz .How many waves are generated in 5 seconds in the medium ?

Determine the velocity of the rotating electron in the third orbit of hydrogen atom. Also determine how many times that electron rotates around the molecules per second.

When a tuning fork of unknown frequency and another tuning fork of frequency 256 Hz are vibrated simultaneously . 4 beats are produced per second . If some wax is dropped on the prong of the first tuning fork, the number of beats produced per second is still 4 . How is this possible ?

Two tuning forks, vibrating simultaneously, produce 6 beats per second. The first of them has a frequency of 312 Hz . Some amount of wax is added to one arm of the second tuning fork , the number of beats per second reduces to 3 . Find out the frequency of this second tuning fork . Is it possible to increase the beat frequency to 6 per second by adding some more wax to the second tuning fork ?

CHHAYA PUBLICATION-ALTERNATING CURRENT -EXERCISE (Very Short Answer Type)
  1. If the frequency of an alternating emf be 50 Hz, how many times the di...

    Text Solution

    |

  2. What percentage of its peak value is the rms value of an ac?

    Text Solution

    |

  3. What is the peak value of the voltage of a 220V ac line?

    Text Solution

    |

  4. If an alternating current is represented by I=sin100pit mA. What is th...

    Text Solution

    |

  5. If an alternating current is represented by . I=sin100pitmA,then what ...

    Text Solution

    |

  6. After what time will the direction of current is an electric supply li...

    Text Solution

    |

  7. An alternating source of emf E=E0sinomegat and of negligible resistanc...

    Text Solution

    |

  8. What changes are observed in the rms value of an ac with changes in th...

    Text Solution

    |

  9. What is the rms value of an alternating current , I=I0sinomegat?

    Text Solution

    |

  10. What is the ratio between the peak value and the average value of a si...

    Text Solution

    |

  11. The instantaneous current in an ac circuit is I=6sin314tA. What is the...

    Text Solution

    |

  12. An alternating current is I=cos 100 pitA. Find out its frequency, peak...

    Text Solution

    |

  13. Why a dc voltmeter and dc ammeter cannot read ac?

    Text Solution

    |

  14. What will be the phase difference between current and emf when 220 V, ...

    Text Solution

    |

  15. What is the unit of impedance?

    Text Solution

    |

  16. What is the reactance of pure resistances in an ac circuit?

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |