APFIVE Capacitor Stored Energy and Dielectrics
A parallel-plate capacitor with plate area A and separation d is filled with a dielectric of constant κ. If the capacitor is charged to voltage V and then the dielectric is removed while maintaining constant charge, by what factor does the energy stored change?
A
Decreases by a factor of κ
B
Increases by a factor of κ
C
Remains unchanged
D
Increases by a factor of κ²
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