A parallel plate capacitor with plate separation d is connected to a battery. Th
ID: 1574560 • Letter: A
Question
A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Coulombs and a voltage of V..(C is the capacitance and Uis the stored energy.) Answer the following questions regarding the capacitor charged by a battery. For each statement below, select True or False After being disconnected from the battery, decreasing d decreases C. With the capacitor connected to the battery, increasing d increases U After being disconnected from the battery, inserting a dielectric with k will decrease C With the capacitor connected to the battery, inserting a dielectric with K will increase U. After being disconnected from the battery, increasing d decreases V After being disconnected from the battery, inserting a dielectric with K will increase V. Submit Answer Tries 0/99Explanation / Answer
1) C = 0A/d ; so of d is decreased then C will increase so it's FALSE.
2) If battery is connected then voltage across capacitor will be constant V so U = ½CV² ; if d is increased then C will decrease and so U will also decrease so it's FALSE.
3) C = K0A/d ; so if dielectric is inserted then capacitance will increase. It's FALSE.
4) If capacitance increases then U will also increase. So it's TRUE.