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Dealing with Charge/Gaussian

1) A physics instructor in an antennae room charges an electrostatic generator to 25 microC, then carries it into the lecture hall. The net electric flux in N.m^2/C through the lecture hall walls is what?

2) A point particle with charge q is at the center of a Gaussian surface in the form of a cube. The electric flux through any one face of the cube is what?

3) A conducting sphere of radius 0.01m has a charge of 1.0*10^-9C deposited on it. The magnitude of the electric field in N/C just outside the surface of the sphere is what?

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