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Answer on Electromagnetism Question for assignment lover

Question #114
The distance between the plates of a plane capacitor was increased in 3 times. In how many times has the charge, the voltage between the plates and the field strength changed, if the capacitor: a) was cut off from the voltage source; b) remained connected to the source of constant tension?
Expert's answer

a) If the capacitor is disconnected from the voltage source, the charge on it can not be changed under any circumstances. So everything remains the same.
b) C = εoε*(S/d)
If the distance increased, the capacity decreased 3-fold. C = Q/U. If the capacity diminished, the charge reduced 3-fold. The electric current in various media.

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