A capacitor with capacitance C is connected to a battery until charged, then disconnected from the battery. A dielectric having constant ? is inserted in the capacitor. What changes occur in the charge, potential and stored energy of the capacitor after the dielectric is inserted?
1.?V stays same, Q increases, U increases
2.?V stays same, Q decreases, U stays same
3.?V increases, Q decreases, U increases
4.?V decreases, Q stays same, U decreases
5.None of the above
6.Cannot be determined
4
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