The following charges are located inside a submarine: 6.95 µC, −9.00 µC, 27.0 µC, and −90.5 µC. (a) Calculate the net electric flux through the hull of the submarine. (b) Is the number of electric field lines leaving the submarine greater than, equal to, or le

a) - 7.40 * 10^6 Nm^2/C^2

b)  More lines enter than leave the surface

Explanation:

a)

As per the Gauss Law  

ε * Intg E.dS = q

E.dS = flux over the whole hull of the submarine

ε = permittivity of vacuum

flux = Σ (charges)/permittivity of vacuum = ( 6.95 + -9 + 27 + -90.5 )*10^-6/8.85 x 10^-12 =

= -0.00006555 /(8.85 x 10^-12)

= - 7.40 * 10^6 Nm^2/C^2

b) The net electric flux is negative, more lines enter than leave the surface.

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