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A thin metallic spherical shell of radius Rcarriesa charge Q on its surface. A point charge(Q)/(2)is placed at its centre C and another charge +2Q is placed outside the shell at point A at a distance x from the centre (x gt R) Find the force on the charge at the centre of the shell and at the point A Find the electric flux through the shell. |
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Answer» Solution :The force on the charge `(Q)/(2) ` placed at the centre of shell is zero because electric FIELD point C , inside the shell is zero. For the PURPOSE of electric force on charge 2Q placed at point A. the charge Q PRESENT on spherical shell may be considered to be ` therefore `Force at point A, `F_A=(1)/(4piin _0).((3Q//2)(2Q))/(x^(2)) =(1)/(4piin _0) .(3Q^(2))/(2) ` (b) Electric flux through the shell `phi_in =(1)/(in_0) `(charged enclosed )`=(1)/(in_0) .(3Q)/(2) =(3Q)/(2in_0) ` ` (##U_LIK_SP_PHY_XII_C01_E09_025_S01.png" width="80%"> |
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