A parallel plate capacitor with plate separation d is connected to a battery. Th
ID: 2275858 • Letter: A
Question
A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged by a battery. For each statement below, select True or False. (also, give me the reasons of how you came up with the answer so I can learn the concept myself)
1.With the capacitor connected to the battery, inserting a dielectric with ? will decrease C.
2.After being disconnected from the battery, decreasing d increases U.
3.With the capacitor connected to the battery, increasing d decreases Q.
4.After being disconnected from the battery, inserting a dielectric with ? will increase V.
5.After being disconnected from the battery, decreasing d decreases C.
6.After being disconnected from the battery, inserting a dielectric with ? will decrease
Explanation / Answer
Use C = Q/V
False: With the capacitor connected to the battery, decreasing d decreases Q.
False: After being disconnected from the battery, decreasing d increases U.
True: With the capacitor connected to the battery, decreasing d increases C.
True: With the capacitor connected to the battery, inserting a dielectric with ? will increase C.
True: After being disconnected from the battery, inserting a dielectric with ? will decrease V.
False: After being disconnected from the battery, inserting a dielectric with ? will increase U.
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