A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will ?
(a) increase four times
(b) be reduced to half
(c) remain the same
(d) be doubled
Answer : (c) remain the same
\( \Phi_E = \dfrac{q_{\text{encl}}}{\varepsilon_0} \)
\( q_{\text{enclosed}} \) is same.
So \( \Phi_E \) is same.
\( A \uparrow \Rightarrow E \downarrow \)
But \( \Phi_E \) is same.
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