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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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  • In the region surrounding a current carrying wire?

    (A) The lines of force are elliptical
    (B) A magnetic field is set up
    (C) Direction of lines of force depends upon direction of current
    (D) Both B & C

    Published on 14-01-2022

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