A capacitor is charged to and then disconnected from the battery

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential

Problem

10\,\mu\text{F}

capacitor is charged to

200\,\text{V}

and then disconnected from the battery. A dielectric slab of dielectric constant

\kappa=5

is completely inserted between the plates. What is the energy stored in the capacitor after the insertion? (a)

0.20\,\text{J}

(b)

0.08\,\text{J}

(c)

0.04\,\text{J}

(d)

1.0\,\text{J}