A parallel plate capacitor with plate separation d is connected to a battery. Th
ID: 1279924 • 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.
True False With the capacitor connected to the battery, increasing d decreases Q.
True False After being disconnected from the battery, inserting a dielectric with ? will decrease U.
True False With the capacitor connected to the battery, inserting a dielectric with ? will decrease C.
True False With the capacitor connected to the battery, decreasing d increases C.
True False After being disconnected from the battery, inserting a dielectric with ? will decrease V.
True False After being disconnected from the battery, increasing d increases U.
Explanation / Answer
Use C = Q/V
After being disconnected from the battery, increasing d increases V. since increasing d decreasing C, V increases TRUE
After being disconnected from the battery, inserting a dielectric with ? will increase V. FALSE C increases, V decreases
After being disconnected from the battery, inserting a dielectric with ? will increase C. TRUE
After being disconnected from the battery, decreasing d increases C. TRUE
With the capacitor connected to the battery, decreasing d increases U.
U = 1/2 (C)(V^2) TRUE
With the capacitor connected to the battery, inserting a dielectric with ? will decrease U.
FALSE