electromagnetism

I am in AP Physics E&M and have learned how to find electric field strengths using Gaussian surfaces for static charges, however I cannot understand why the field produced by an insulating plate is half of that produced by a conducting one. Also, in the example, we are only considering surface charge density, so in theory, it shouldn't matter whether or not the material is a conductor or insulato…

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My book states that: In Lenz's Law, mechanical energy of the magnet gets converted to electrical energy, hence Law of Conservation of Energy is maintained. But Faraday's Law tells that if relative velocity of magnet with respect to conductor is constant, the induced EMF as well as current is constant as well(It is what is written in my book as an interpretation of Faraday's Law, and my interpreta…