1. Charged particles amounting to charge +Q are placed on a spherically conducting shell having a point particle of charged +2Q at the center of its cavity. What is the net charge on the INNER surface of the shell? - 2Q.  - Q + Q. + 2Q. + 3Q.   2. Charged particles amounting to charge +Q are placed on a spherically conducting shell having a point particle of charged +2Q at the center of its cavity. What is the net charge on the OUTER surface of the shell?   - 2Q.

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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.