72>)If a solid conducting sphere of radius 0.5 m carries a total charge of 225 nC uniformly distributed throughout its surface, what is the magnitude of the electric field at 0.25 m?  1.6 x 1013 N/C   8.1 x 1012 N/C   3.2 x 1013 N/C   0 N/C

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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.