Electric Field

Electric Field

$$ \large E = \frac{1}{4 \pi \epsilon_0} \frac{q_1 q_2}{r^2} $$

In a Capacitor

$$ \large E = \frac{\sigma}{\epsilon_0} = \frac{Q}{\epsilon_0 S} \quad \Rightarrow \quad \frac{dE}{dt} = \frac{I}{\epsilon_0 S} $$
  • GRE Physics GR0877: Problem 067

Electric Flux

$$ \large \Phi_E = \int_S \vec{E} \cdot d \vec{a} $$

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