Consider an object of mass 11.1 kg. Now imagine taking all the protons out of the object and stuffing them into a box. Also take all the electrons out of the object and stuff them in a second box.  You initially put the boxes of protons and electrons 39 m apart. Now you want to take the two boxes and move them farther apart, to a new distance of 70 m apart. How much work (that is, energy) would you have to expend to pull the boxes that much farther apart, fighting against the electrostatic attraction between them?       1.45E+25 J     2.89E+25 J     5.78E+25 J     1.16E+26 J

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.