Refer to the arrangement of charges in Fig. and a Gaussian surface ...

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Refer to the arrangement of charges in Fig. and a Gaussian surface of radius \( R \) with \( Q \) at the centre. Then
(a) total flux through the surface of the sphere is \( \frac{-Q}{\varepsilon_{0}} \).
W.
(b) field on the surface of the sphere is \( \frac{-Q}{4 \pi \varepsilon_{0} R^{2}} \).
(c) flux through the surface of sphere due to \( 5 Q \) is zero.
(d) field on the surface of sphere due to \( -2 Q \) is same everywhere.
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