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Parallel-plate capacitors are widely used in electronics, such as for preventing direct current leakage. An electric field is generated between a pair of plates that has a surface charge density of 4.00 x 10-6 C/m2. The plates are separated by 0.17 μm.
(a) What is the magnitude of the electric field between the plates?
What is the magnitude of the excess charge on the Earth, noting the electric field of a conducting sphere is equivalent to a point charge at its center in C
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