Home
Class 8
PHYSICS
The frequency of sinusoidal A.C. voltage...

The frequency of sinusoidal A.C. voltage is 50 Hz. How many times does have voltage become zero in 5s ?

Text Solution

Verified by Experts

(i) Change of sign in one cycle .
(ii) Is it possible to increase the strenght of a magnet if the are arraged in an orderly way ?
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETISM

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION ( LEVEL 1)|29 Videos

  • ELECTRICITY

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION (Level 3)|10 Videos

  • FORCE AND PRESSURE

    PEARSON IIT JEE FOUNDATION|Exercise COMPETITION CORNER |37 Videos

Similar Questions

Explore conceptually related problems

The frequency of A.C. is 50 Hz. How many times the current becomes zero in one second?

The frequency of a source of sound is 100 Hz . How many times does it vibrate in a minute ?

If the frequency in an A.C. circuit is 100 Hz, then the time taken by the voltage to cover from maximum to next positive maximum will be

What would be the equation of sinusoidal voltage of amplitude 5V, frequency 1 kHz and phase difference zero?

An ac voltage is represented by E=220 sqrt(2) cos (50 pi) t How many times will the current become zero in 1 s?

PEARSON IIT JEE FOUNDATION-ELECTROMAGNETISM-CONCEPT APPLICATION ( LEVEL 2)
  1. Why is electrical energy transmitted at high voltage from a distant po...

    Text Solution

    |

  2. A magnetic needle placed near a current carrying conductor deflects du...

    Text Solution

    |

  3. Can we use Ampere's right hand rule to determine the deflection o...

    Text Solution

    |

  4. A straight conductor carrying current produces a magnetic field around...

    Text Solution

    |

  5. A transformer has 250 primary turns and 500 secondary turns. If 200 V ...

    Text Solution

    |

  6. What happens if earthing is not proper in a telegraph ?

    Text Solution

    |

  7. What causes the rectangular coil in a D.C. motor to rotate? Explain.

    Text Solution

    |

  8. Two, current carrying conductors are placed parallel to each other. E...

    Text Solution

    |

  9. Can a galvanometer as such be used for measuring the current? Explain.

    Text Solution

    |

  10. A straight conductor carrying current produces a magnetic field around...

    Text Solution

    |

  11. The frequency of sinusoidal A.C. voltage is 50 Hz. How many times does...

    Text Solution

    |

  12. In an electromagnetic induction, what is the source of electric energy...

    Text Solution

    |

  13. Two wires, A and B are placed parallel to each other in a vertical pla...

    Text Solution

    |

  14. A spring made of copper is moved towards a stationary bar magnet. What...

    Text Solution

    |

  15. How do you locate a current-carrying wire concealed in a wall?

    Text Solution

    |

  16. Can we a transformer be used to step up or step down a D.C. voltage? E...

    Text Solution

    |

  17. A magnet is dropped vertically downwards along the axis of the Alumini...

    Text Solution

    |

  18. To detect electric current using a galvanoscope, the plane of the coi...

    Text Solution

    |

  19. By increasing the number of turns in the coil, the strength of the mag...

    Text Solution

    |

  20. Why are magnets with concave shaped poles used in a D.C. motor? What...

    Text Solution

    |