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Electric Charges and Fields Test - 17

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Electric Charges and Fields Test - 17
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  • Question 1
    1 / -0

    A hollow metal sphere of radius 5 cm is charged so that the potential on its surface is 10 V. The potential at the centre of the sphere is

    Solution

    Since potential inside the hollow sphere is same as that on the surface.

     

  • Question 2
    1 / -0

    An electric dipole of moment p is placed in the position of stable equilibrium in uniform electric field of intensity E. It is rotated through an angle θ from the initial position. The potential energy of electric dipole in the final position is

    Solution

    Potential energy of dipole in electric field U = -pEcosθ; where θ is the angle between electric field and dipole.

     

  • Question 3
    1 / -0

    The S.I. unit of electric flux is

    Solution

    S.I. unit of electric flux is Volt metre

     

  • Question 4
    1 / -0

    Assertion: A metallic shield in form of a hollow shell may be built to block an electric field.

    Reason: In a hollow spherical shield, the electric field inside it is zero at every point

    Solution

    In a hollow spherical shield, the charge is present only on its surface but charge is zero at every point inside the hollow sphere. Hence, the metallic shield in form of hollow shell may be built to block an electric field.

     

  • Question 5
    1 / -0

    A region surrounding stationary electric dipoles has

    Solution

    Stationary electric dipole has electric field only.

     

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