Question 55 from p. 146 asks
A capacitor that contains a dielectric is fully charged by and subsequently disconnected from a battery. removing the dielectric form this charged capacitor decreases its capacitance because:
A. the voltage across the plates decreases
B. the voltage across the plates increases
C. the amount of charge on each plate decreases
D. the amount of charge on each plate increases
I used the formulas and chose B, which is the correct answer. but could someone please explain the above in a conceptual manner? The capacitor is fully charged initially, meaning that the max amount of charges are put on each plate of the capacitor. The dielectric restricts the flow of charge (i.e. current) before the battery is disconnected. Once the battery is disconnected and the dielectric removed, charge is able to flow from one plate to another. Capacitance, or ability of the plates to hold charge, decreases... so why would voltage across the plates increase? Shouldn't the voltage/potential difference across the plates decrease? (I know the formula C = q/V says voltage should increase, but I still don't understand...)
A capacitor that contains a dielectric is fully charged by and subsequently disconnected from a battery. removing the dielectric form this charged capacitor decreases its capacitance because:
A. the voltage across the plates decreases
B. the voltage across the plates increases
C. the amount of charge on each plate decreases
D. the amount of charge on each plate increases
I used the formulas and chose B, which is the correct answer. but could someone please explain the above in a conceptual manner? The capacitor is fully charged initially, meaning that the max amount of charges are put on each plate of the capacitor. The dielectric restricts the flow of charge (i.e. current) before the battery is disconnected. Once the battery is disconnected and the dielectric removed, charge is able to flow from one plate to another. Capacitance, or ability of the plates to hold charge, decreases... so why would voltage across the plates increase? Shouldn't the voltage/potential difference across the plates decrease? (I know the formula C = q/V says voltage should increase, but I still don't understand...)