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A spherical metallic conductor has a sph...

A spherical metallic conductor has a spherical cavity. A positive charge is placed inside the cavity at its centre. Another positive charge is placed outside it. The conductor is initially electrically neutral.
`{:(,"Column I (Cause)",,,"Column II (Effect)"),((A),"If outside is shifted to other position",,(p),"Distribution of charge on innner surface"),(,,,,"of cavity charges"),((B),"If inside charge is shifted to other position",,(q),"Distribution of charge on outer surface of"),(,,,,"conductor charges"),((C),"If magnitude of charge inside cavity is",,(r),"Electric potential at the centre of conductor"),(,"increased",,,"changes due to charges present"),(,,,,"on outer surface of conductor"),((D),"If conductor is earthed",,(s),"Force on the charge placed inside"),(,,,,"cavity changes"):}`

Text Solution

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The correct Answer is:
(A) q, (B) p, s (C) p, q, r (D) q, r
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Knowledge Check

  • At a point inside a charged conductor the

    A
    electric field is zero
    B
    electric field is constant
    C
    potential is constant
    D
    (a) and (c) both

  • A charge Q_(0) is placed at the center of spherical cavity of a conductor and another charge Q is placed outside the conductor as shown in the figure. The correct statement is :

    A
    Force on `Q_(0)` and Q are equal and opposite
    B
    Force on `Q_(0)` is zero and force on Q is nonzero
    C
    Force on Q and `Q_(0)` is zero
    D
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  • A solid spherical conductor of radius R has a spherical cavity of radius at its centre. A charge is kept at the centre of the cavity. The charge at the inner surface, outer surface are respectively.

    A
    `+Q,-Q`
    B
    `-Q,+Q`
    C
    `Q, - Q`
    D
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