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     EduGorilla 
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    A charged sphere of diameter 4 cm has a charge density of 10-4 coulomb/cm2. What is the work done (in joules) when a charge of 40 nanocoulomb is moved from infinity to a point which is at a distance of 2 cm from the surface of the sphere?

    Options :-

    1. 14.4 π
    2. 28.8 π
    3. 144 π
    4. 288 π
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