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Electrostatics Test - 94

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Electrostatics Test - 94
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  • Question 1
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    Figure shows the electric lines of force emerging from a charged body. If the electric field at A and B are EA and EB respectively and if the displacement between A and B is r then

  • Question 2
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    ABC is an equilateral triangle. Charges +q are placed at each corner. The electric intensity at Owill be

    Solution

  • Question 3
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    In the electric field of a point charge q, a certain charge is carried from point A to B, C,D and E. Then the work done

  • Question 4
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    The magnitude of electric field intensity E is such that, an electron placed in it would experience an electricalforce equal to its weight is given by
    Solution

  • Question 5
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    Three concentric spherical shells have radii a, b andc(a A, VB and VC denote the potentials of the three shells, then, for c = a + b, wehave
    Solution

  • Question 6
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    Two parallel plates have equal and opposite charge. When the space between them is evacuated, the electric field between the plates is 2 × 105 V/m. When the space is filled with dielectric, the electric field becomes1 × 105 V/m. The dielectric constant of the dielectric material
    Solution

  • Question 7
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    The insulation property of air breaks down at E = 3 × 106 volt / metre. The maximum charge that can be given to a sphere of diameter 5 m is approximately (in coulombs)
    Solution

  • Question 8
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    Solution

  • Question 9
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    The mean free path of electrons in a metal is4 × 10–8 m. The electric field which can give on an average 2 eV energy to an electron in the metal will bein units of V/m
    Solution

  • Question 10
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    If E is the electric field intensity of an electrostatic field, then the electrostatic energy density is proportional to
    Solution

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