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  • Oil rises up the wick in a lamp because?

    (A) Of the diffusion of oil through wick
    (B) Oil is very light
    (C) Of the surface tension phenomenon
    (D) Of the capillary action phenomenon

    Published on 14-01-2022

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  • Dynamo is a device for converting?

    (A) Heat energy into electrical energy
    (B) Mechanical energy into electrical energy
    (C) Magnetic energy into electrical energy
    (D) None of the above

    Published on 14-01-2022

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