New answers tagged capacitance
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Why is the energy density of an electric field between two spherical surfaces equal to $E^2\epsilon_0/2$, where $E$ is the electric field?
Your solution implicitly assumes that the energy density is uniform in the region between the plates. It's not; there's zero energy density inside the inner electrode (since $\vec{E} = 0$ there), and ...
- 50.8k
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How does capacitance of a capacitor not depend on the distance of the capacitor to a battery?
If sphere A has a charge of Q and a radius of 1cm, then the voltage is 100kQ. If sphere A has a radius of 1cm and the gap between the 2 spheres is negligible, then we can say that a is 2cm away, and ...
- 175
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Why is charge on a conductor stable?
Yes that's right, for a charged conductor the electric field outside the surface is directed such as to pull charge off the surface. The reason the charge doesn't leave the surface is to do with what ...
- 60.2k
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