The Gaussian surface for a line charge will be:
Correct answer: B. Cylinder
- A. Sphere
- B. Cylinder
- C. Cube
- D. Cuboid
Explanation
For a line of charge the gaussian surface is a cylinder. To find the area of the surface we only count the cylinder itself. The two circles on either end cannot be part of a gaussian surface because they do not have a constant electric field, and the electric field is not perpendicular to the circles. Therefore, option B is correct.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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