Three hollow. concentric spherical shell conductors are charged as follows: The

Question

Three hollow. concentric spherical shell conductors are charged as follows: The inner sphere carries charge -Q. The middle sphere carries charge +2Q. The outer sphere carries charge +Q. What is the charge on the outer surface of the middle sphere.? zero +Q -Q +2Q -2Q Two conductors are joined by a long copper wire. Thus, each carries the same free charge. no free charge can be present on either conductor. the electric field at the surface of each conductor is the same. each conductor must be at the same potential. the potential on the wire is the average of the potential of each conductor. In the figure, the electric field lines arising from two charges Q_1 and Q_2 are shown. From this drawing, we can bee that the electric field could be zero at P_2. the electric field could be zero at P_1. both Q_1 and Q_2 have the same sign. Q^1_1 > Q^1_2 None of these is true.

Explanation / Answer

Q1. E -2Q

Due to charge of the outer sphere the outer surface of middle sphere is induced with opposite but same charge.

Q2. E

Q3 . E

The configuration looks like feild lines produced by two same charge but opposite sign.

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