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In this video I will explain why does a dielectric affect he electric field, the voltage, and the energy stored in the capacitor by: 1)fully charging a capacitor with a battery, 2) disconnecting the battery, 3) then inserting a dielectric (with a dielectric constant k Greater than or equal to 1).

Next video in this series can be seen at:
https://youtu.be/w7nBIFuJLRE