First slide

Gauss's Law

Question

What is the electric flux linked with closed surface?

Moderate

A

$10^{11} N - M^{2} / C$
B

$10^{12} N - m^{2} / C$
C

$10^{10} N - m / C$
D

$8 .86 \times 10^{13} N - m^{2} / C$

Solution

$Electric flux, ϕ = \frac{q}{ε_{o}}$
Where q = Total charge enclosed by closed surface
$ϕ = \frac{1 .25 + 7 + 1 - 0 .4}{ε_{o}} = \frac{8 .85 C}{8 .85 \times 10^{- 12} C^{2} N^{- 1} m^{- 2}} = 10^{12} N - m^{2} / C$

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