The correct answer is A. Gauss’s law.
Gauss’s law is a law of physics that relates the electric field to the electric charge. It states that the electric flux through a closed surface is proportional to the total electric charge enclosed by the surface. The electric flux is the surface integral of the electric field over the surface.
Kirchhoff’s law is a law of physics that relates the current to the voltage and resistance in an electrical circuit. It states that the sum of the currents entering a node is equal to the sum of the currents leaving the node.
Faraday’s law is a law of physics that relates the electric field to the magnetic field. It states that the change
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