Lessons in Capacitance 1:


A semi-circular dielectric plate is partially sandwiched between two semi-circular metallic plates. The plates are stationary, while the dielectric plate is free to rotate.
The thickness of the dielectric plate is .5mm, which is also the separation between the metallic plates.
The metallic plates are connected to a 20V source.
What is the angular acceleration of the dielectric plate?

14 comments:

  1. AnonymousFebruary 20, 2011 at 5:48 PM

    bhaiya, 1kg mass kiska hai-dielectric plate or metallic plates or both have 1kg each.

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  2. AnonymousFebruary 20, 2011 at 6:00 PM

    4*10^5*epsilon-if only dielectric plate has mass and metallic are massless.

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  3. ShivankerFebruary 20, 2011 at 7:37 PM

    m getting ε/5π^2

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  4. AnonymousFebruary 20, 2011 at 10:34 PM

    i am getting almost the same as anonymous, ecxept that i am getting 5.33 instead of 4.5

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  5. AnonymousFebruary 20, 2011 at 10:46 PM

    This comment has been removed by a blog administrator.

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  6. AnujFebruary 20, 2011 at 11:15 PM

    why do YOU have to post the solution?

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  7. AnonymousFebruary 20, 2011 at 11:27 PM

    This comment has been removed by a blog administrator.

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  8. ShivankerFebruary 20, 2011 at 11:33 PM

    yeah sorry..
    mine is same..
    4x10^5 epsilon(0)

    P.S.: anonymous, plz don't post solutions..

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  9. AmitFebruary 23, 2011 at 11:27 AM

    hey somebody please confirm the method of surface charge question..

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  10. aakashFebruary 25, 2011 at 2:44 AM

    This comment has been removed by the author.

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  11. aakashFebruary 25, 2011 at 2:46 AM

    i am getting 8x10^5 epsilon(0)

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  12. aakashFebruary 25, 2011 at 6:39 PM

    divide the above by two also

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  13. shaanFebruary 26, 2011 at 6:56 PM

    yar i'm getting 10^9..
    sumone pl tell d way--how to find torque

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  14. AnujMarch 10, 2011 at 3:29 PM

    find the energy (potential in this case) as a function of theta.

    torque=-dU/d(theta) i guess.

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