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Why does a phonograph record attract dus...

Why does a phonograph record attract dust particles just after it is cleaned?

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A, B, C, D
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Why dose a phonograph - record attract dust partiules just . after it is cleaned?

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Knowledge Check

  • Dust particles released by comets are continuously acted upon by sun's radiation pressure in radial outward direction. Assuming a dust particle with rho =3.5 xx10^3 kg//m^3 and reflection coefficient 0. for what value of radius r does gravitational force on dust. particle just balance the radiation force on it from sunlight ? (power radiated by sun =4xx10^(26) W , mass of sun =2xx10^(30)kg )

    A
    `0.1 mueta`
    B
    `0.17 mueta`
    C
    `10 mu eta`
    D
    `17 mu eta`

  • The negatively charged dust particles are attracted by

    A
    Electrode wires
    B
    Discharge corona
    C
    Collection plates
    D
    All of the above

  • A particle of mass m collides with another stationary particle of mass M such that the second particle starts moving and the first particle stops just after the collision. Then which of the following conditions must always be valid ?

    A
    `m/Mle1`
    B
    `m/M=1`
    C
    `e=1`
    D
    `ele1`

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    Why does fire ul("attract") insects ?

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