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Why surface charge densities of all the plates cant be the same? I mean, suppose +q charge is deposited in plate 2. Then why -q charge will not be induced in plate 1? This happens in case of concentric spheres, so why not here? How to understand when same charge is induced and when not? Does it happen only because plates 1 and 4 are to be maintained at the same potential, or is there some other reason?

 Why surface charge densities of all the plates cant be the same? I mean, suppose +q charge is deposited in plate 2. Then why -q charge will not be induced in plate 1? This happens in case of concentric spheres, so why not here? How to understand when same charge is induced and when not? Does it happen only because plates 1 and 4 are to be maintained at the same potential, or is there some other reason?  

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1 Answers

Arun Kumar IIT Delhi
askIITians Faculty 256 Points
6 years ago
The reason that happens in case of spheres is because the charge is conserved in a closed surface.
The rule that you have to follow in both of them is that electric field inside the conductor is zero.
Thanks & Regards
Arun Kumar
IIT Delhi
Askiitians Faculty

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