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The volume charge density within a volum...

The volume charge density within a volume V is `rho(r)`. What is the force on a small test charge `q_0` placed outside the volume having position vector `vecr_0`with respect to the same origin considered to specify the position vector of the charge distribution within the volume.

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MODERN PUBLICATION-ELECTRIC CHARGES AND FIELDS -Revision Exercises (Short Answer )
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