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A metal sphere with its centre at A and ...

A metal sphere with its centre at A and radius R has a charge 2q on it. The field at a point B outside the sphere is E. If another metal sphere of radius 3R and having a charge -3q is placed with its centre at point B, find out the resultant electric field at a point mid way between A and B.

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The correct Answer is:
10E
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Knowledge Check

  • A negative charge is placed at the centre of the non-conducting sphere. The direction of electric field on any point at the surface of the sphere is

    A
    radially inward
    B
    radially outward
    C
    along the tangent to the surface
    D
    no electric field produced

  • A negative charge is placed at the centre of the non-conducting sphere. The direction of electric field on any point at the surface of the sphere is

    A
    Radially inward
    B
    Radially outward
    C
    Along the tangent to the surface
    D
    No electric field produced

  • A charge q is distributed uniformly on a ring of radius R. A sphere of equal radius R is constructed with its centre at the periphery of the ring, Find the flux of the electric field through the surface of the sphere

    A
    `(q)/(in_(0))`
    B
    `(q)/(2 in_(0))`
    C
    `(q)/(3in_(0))`
    D
    zero

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