\( A \) and \( B \) are two conducting concentric spherical shells. \( A \) is given a charge \(...

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\( A \) and \( B \) are two conducting concentric spherical shells. \( A \) is given a charge \( Q \) while \( B \) is uncharged. If now \( B \) is earthed as shown in figure. Then
(a) The charge appearing on inner surface of \( B \) is \( -Q \)
(b) The field inside and outside \( A \) is zero
(c) The field between \( A \) and \( B \) is not zero
(d) The charge appearing on outer surface of \( B \) is zero
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