1. The energy stored in a parallel plate capacitor is A.equal to the work required to charge it B.½ CV 2 C.equal to the average potential difference multiplied by the final charge D.all of the above E.none of the above

2. Energy can be stored in a vacuum. A.True B.False

3. The capacitance of a capacitor of a given dimension is _______ when there is a dielectric material between the plates than when there is air or vacuum. A.greater B.less C.the same

4. The potential across a capacitor of a given dimension is _______ when there is a dielectric material between the plates than when there is air or vacuum. A.greater B.less C.the same

5. The charges on the plates of a capacitor of a given dimension is _______ when there is a dielectric material between the plates than when there is air or vacuum. A.greater B.less C.the same

6. Due to dielectric breakdown, when a dielectric material is subjected to a sufficiently strong electric field, it becomes a(n) ________. A.Insulator B.conductor

7. The plates of a parallel-plate capacitor are 2.50 mm apart, each carrying a charge of magnitude 80.0 nC. The plates are in a vacuum and the electric fields between the plates has a magnitude of 4.00 x 10 6 V/m. What is the potential difference between the plates (in V)? RankResponses 1 2 3 4 5 6

8. The plates of a parallel-plate capacitor are 2.50 mm apart, each carrying a charge of magnitude 80.0 nC. The plates are in a vacuum and the electric fields between the plates has a magnitude of 4.00 x 10 6 V/m. What is the capacitance (in pF)? RankResponses 1 2 3 4 5 6

9. A 12.5 μF capacitor is connected to a power supply that keeps a constant potential difference of 24.0 V across the plates. A piece of material having a dielectric constant of 3.75 is placed between the plates, filling the space. How much energy is stored in the capacitor before the material was inserted (in mJ)? RankResponses 1 2 3 4 5 6

10. A 12.5 μF capacitor is connected to a power supply that keeps a constant potential difference of 24.0 V across the plates. A piece of material having a dielectric constant of 3.75 is placed between the plates, filling the space. How much energy is stored in the capacitor after the material was inserted (in mJ)? RankResponses 1 2 3 4 5 6