Understanding the Effects of Dielectrics on Capacitors

AI Thread Summary
Inserting a dielectric into a capacitor keeps the charge constant while decreasing the potential and increasing capacitance due to the dielectric's ability to polarize and reduce the electric field within the capacitor. The surface area of the capacitor remains unchanged, which means the total charge stored does not vary. Without a power source, the charge remains fixed, but if a power source were connected, the capacitor would draw more charge, further increasing capacitance. The relationship between capacitance, charge, and potential is governed by the formula C = Q/V, where C is capacitance, Q is charge, and V is voltage. Understanding these principles clarifies how dielectrics influence capacitor behavior.
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Homework Statement


When a dielectric is inserted in a capacitor, why does the charge remain unchanged while the potential decreases and capacitance increase?

Homework Equations


The Attempt at a Solution


i'm not really about this one, but is it because the charges accumulate on the surface area and since surface area doesn't change after an insertion of a dielectric, the charges won't change since area didn't change? But then again... Capacitance is a capacitors ability to hold a charge in a electric field and it increase so you can see my dilemma lol.
 
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O never mind there was no power source ;P but on that note, let's say if there was a power source, how would it change the answer?
 
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