Home
Class 12
PHYSICS
Why is a spark produced in the switch of...

Why is a spark produced in the switch of a fan when it is put off?

Text Solution

Verified by Experts

When the l+ght is put off, a large induced emfis.set up across the gap in the awitch and as a result sparking takes place in the switch.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    BETTER CHOICE PUBLICATION|Exercise SHORT ANSWER TYPE QUESTIONS|10 Videos

  • ELECTROMAGNETIC INDUCTION

    BETTER CHOICE PUBLICATION|Exercise SHORT ANSWERTYPE QUESTIONS|13 Videos

  • ELECTRICAL MEASUREMENTS

    BETTER CHOICE PUBLICATION|Exercise Most Expected Questions|7 Videos

  • ELECTROMAGNETIC WAVES

    BETTER CHOICE PUBLICATION|Exercise NUMERICALS|4 Videos

Similar Questions

Explore conceptually related problems

Why is plasma produced in stars ?

Water enters into a cell when it is put into:

A transistor can be used as a switch by operating it in its cut off state or saturation state. (Yes/No)

Given instructions same as in chapter 1. Assertion:In Hertz experiment, the electric vector of radiation produced by a source gap is parallel to the gap. Reason:Production of sparks between the detector gap is maximum when it is perpendicular to the source gap.

In E.coli, the lac operon gets switched on when :

Which one of the following parts of the plant when put into the soil is likely to produce new offspring?

A circuit is connected as shown in the figure with the switch S open. When the switch is closed, the total amount of charge that flows from Y to X is

BETTER CHOICE PUBLICATION-ELECTROMAGNETIC INDUCTION-NUMERICAL PROBLEMS
  1. Why is a spark produced in the switch of a fan when it is put off?

    Text Solution

    |

  2. A magnetic field of 2xx10^-2T acts at right angles to a coil of area 1...

    Text Solution

    |

  3. A small piece of metal wire is dragged across the gap between this ...

    Text Solution

    |

  4. A copper rod of length 2 m fixed at one end is rotating with an angula...

    Text Solution

    |

  5. A brass rod of length 3.0 m fixed at one end is rotating with angula...

    Text Solution

    |

  6. A silver rod of length one metre fixed at one end is rotating with ang...

    Text Solution

    |

  7. An e.m.f. of 250 muV is induced in a coil, when current in it changes ...

    Text Solution

    |

  8. A wire of length 0.1 m moves with a speed of 10 "m/s" perpendicular to...

    Text Solution

    |

  9. A coil of 100 turns and area 200 "cm"^(2) is placed at right angles to...

    Text Solution

    |

  10. The magnetic flux passing through a coil changes from 6 xx 10^(-3)wb t...

    Text Solution

    |

  11. The magnetic flux passing through a coil changes from 5 xx 10^(-2) w...

    Text Solution

    |

  12. The magnetic flux through a coil changes from 4 xx 10^(-2) wb to 6 xx ...

    Text Solution

    |

  13. A magnetic ifeld 2 xx 10^(-2)"wbm"^(-2) is acting at right angle to a...

    Text Solution

    |

  14. A magnetic field of 4 xx 10^(-4)"wbm"^(-2) is acting at right angle to...

    Text Solution

    |

  15. A magnetic field 5 xx 10^(-4)"wbm"^(-2) is acting at right angle to a...

    Text Solution

    |

  16. A magnetic flux of 5 microweber is linked with a coil when a current o...

    Text Solution

    |

  17. A magnetic flux of 5 microweber is linked with a coil when a current o...

    Text Solution

    |

  18. The magnetic flux threading a coil changes from to 12x10(-3) Wb to 6x1...

    Text Solution

    |

  19. What will be the coefficient of mutual inductance of a pair of coil if...

    Text Solution

    |

  20. A wire is cut across a flux of 0.2x10(-2) weber in 0.12 seconds. What ...

    Text Solution

    |

  21. A railway track running North South has two parallel rails 1.0m apart....

    Text Solution

    |