Railways Sample Paper RRB (Assistant Loco Pilot) Sample Test Paper-10

  • question_answer For which among the following house appliances, magnet is an essential part?

    A)  Calling bell      

    B)     Fan

    C)                                                  Washing machine  

    D)  All of the above

    Correct Answer: D

    Solution :

    Magnets are usually used in appliances with spinning motors such as a sewing machine or a fan. They are also used in heat induction stoves. There is a magnet under the surface which also serves as a heating element. Wherever the pan makes contact, that's where the plate heats up. In a spinning motor, there are 2 rotating magnets, one regular magnet and one electro-magnet. When electricity travels through the electro- magnet, both magnets will spin because either the south or north poles align and then repel each other. The normal magnet is attached to a shaft which spins a gear which eventually will spin whatever it is attached to.

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