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A Parallel-Plate Capacitor of Capacitance C Is Connected to a Battery

Question 6

Multiple Choice

A parallel-plate capacitor of capacitance C is connected to a battery of voltage V until it is fully charged. The energy density in the capacitor is then equal to u. If the same capacitor is then connected to a battery of voltage 2V its energy density becomes equal to


A) u.
B) u/4.
C) u/2.
D) 2u.
E) 4u.

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