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A charge Q is placed at a distance D(>R) above the centre of disk of radius R The magnitude of flux through disk is ϕ . Now a hemispherical shell of radius R is put above the disk to form a closed surface. The flux through the closed surface, if direction of area vector along outward normal is +ve, is :

(A)ϕ(B)ϕDR(C)ϕ(D)ϕRD

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