Charge inside a closed surface from the flux entering and leaving it

1. A.
   $\frac{\phi_2-\phi_1}{\varepsilon_0}$
2. B.
   $\frac{\phi_1+\phi_2}{\varepsilon_0}$
3. C.
   $\varepsilon_0(\phi_1-\phi_2)$
4. D.
   $\varepsilon_0(\phi_2-\phi_1)$

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1. A.
   $\frac{\phi_2 - \phi_1}{\varepsilon_0}$
2. B.
   $\frac{\phi_2 + \phi_1}{\varepsilon_0}$
3. C.
   $\frac{\phi_1 - \phi_2}{\varepsilon_0}$
4. D.
   $\varepsilon_0(\phi_2 - \phi_1)$

Tap an option to check your answer.

1. A.
   $\dfrac{\phi_2 - \phi_1}{\varepsilon_0}$
2. B.
   $\dfrac{\phi_1 + \phi_2}{\varepsilon_0}$
3. C.
   $\varepsilon_0(\phi_1 - \phi_2)$
4. D.
   $\varepsilon_0(\phi_2 - \phi_1)$

Tap an option to check your answer.