A closed paper bag

PHYSICS · Subjective · Fermi University Physics · Electricity, Magnetism & Electromagnetism · Electrostatic fields and potential · Electrostatic fields and potential

Electricity, Magnetism and Electromagnetism, Ch Electric flux and Gauss's law

Problem

A closed paper bag, crumpled into an irregular shape, contains two small charged beads carrying

+4.0\,\mathrm{nC}

and

-1.5\,\mathrm{nC}

. A third bead carrying

+8.0\,\mathrm{nC}

is held

3.0\,\mathrm{cm}

outside the bag. All charges are at rest and the bag itself is uncharged and non-conducting. Taking the outward normal on the closed surface of the bag, calculate the total electric flux

\Phi_E

out of the bag.

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