An air-filled, parallel-plate capacitor with area A and gap width d is connected to a battery that maintains the plates at potential difference V.
1. The plates are pulled apart so that the gap is 2 times wider, while they remain in electrical contact with the battery terminals. By what factor Uelectric,f/Uelectric,iUelectric,f/Uelectric,i does the potential energy of the capacitor change? (Express your answer to two significant figures.)
2. By what factor Uelectric,f/Uelectric,iUelectric,f/Uelectric,i does the potential energy of the capacitor change when the gap becomes 2 times wider, if the capacitor is removed from the battery and thus isolated? (Express your answer to two significant figures.)
Homework Answers
The given problem is based on the concept of energy stored in a charged capacitor.
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