1.

A metallic spherical shell of radius r_1 is surrounded by another concentric metallic spherical shell of radius r_2. The space between the two shells is filled with a dielectric of dielectric constant K. If a charge Q is given to the inner shell, the charge appearing on the outer surface of the outer shell is

Answer»

`+Q`
`(+Qr_1^2)/r_2^2`
`(+QKr_1^2)/r_2^2`
`Q[1-1/K]`

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