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hree identical metal plates with large surface areas are kept parallel to each other.The leftmost plate is given a charge Q, the rightmost is given a charge -2Q & the middle one remains neutral.Find the charge appearing on the outer surface of the rightmost plate.

hree identical metal plates with large surface areas are kept parallel to each other.The leftmost plate is given a charge Q, the rightmost is given a charge -2Q & the middle one remains neutral.Find the charge appearing on the outer surface of the rightmost plate.

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1 Answers

madhav purohit
32 Points
10 years ago

Consider the gaussian surface the induced charge be as show in the fig. [in the quest.]the net field at p due to all the charge is zero 


-2Q+q/2Ae0 (left)+q/2Ae0

+q-Q+q=0

q=3/2Q

charge on the right side of right most plate

=-2Q+q=-2Q+3/2Q

=-Q/2

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