question_answer

If the electric flux entering and leaving an enclosed surface respectively are \[\phi ,\] and \[{{\phi }_{2}},\] the electric charge inside the surface will be

A)  \[\frac{{{\phi }_{2}}-{{\phi }_{1}}}{{{\varepsilon }_{0}}}\]                             

B)  \[\frac{{{\phi }_{2}}+{{\phi }_{1}}}{{{\varepsilon }_{0}}}\]

C)  \[\frac{{{\phi }_{1}}-{{\phi }_{2}}}{{{\varepsilon }_{0}}}\]             

D)         \[{{\varepsilon }_{0}}({{\phi }_{1}}+{{\phi }_{2}})\]