Question

Three point charges q + Q, q, q - Q are enclosed by the surface S. What the net flux crosses S *
1 point
a. 3q
b. 2q
c. 3q - Q

Answer 1

Given : Three point charges q + Q, q, q - Q are enclosed by the surface S.

To find : The net flux crosses the surface S.

solution : According to Gauss law,

it is state that total electric flux through the Gaussian surface is the ratio of total charge enclosed by the surface to the permittivity of medium. i.e., Φ = Q_in/ε

given, Three point charges q + Q, q , q - Q are enclosed by the surface.

so, total charge enclosed by the surface, Q_in = (q + Q) + q + (q - Q) = 3q

so net Electric flux , Φ = 3q/ε

Therefore net electric flux through the surface S is 3q/ε.

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Answer 2

Answer:

3q is the perfect answer