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  • The polarity of the current changes according to its frequency ______.

    both AC and DC
    AC current
    DC current
    none
  • The special wire that melts when certain amount of electricity flows through it is ______.

    ammeter
    voltage
    fuse
    galvanometer
  • What is the full form of MCB?

    Magnetic Circuit Breaker
    Miniature Code Breaker
    Miniature Circuit Branch
    Miniature Circuit Breaker
  • ______ is a source of sound that converts electrical energy into kinetic energy and then sound energy.

    Bulb
    Electric bell
    Fan
    Cycle
  •  ______ is a system where excessive electricity is passed through it into the ground.

    Surfacing
    Earthing
    Wiring
    Grounding
  • In household normally ______ of fuse is used.

    2 to 12A
    4 to 14A
    1 to 10A
    5 to 15A
  • In small scale industries up to ______ of fuse is used.

    15A
    40A
    30A
    60A
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