Fill in a T/F answer for each statement below: 1. [ ] A 10 F capacitor can store

Question

Fill in a T/F answer for each statement below:

1. [ ] A 10 F capacitor can store 10 C of charge for each volt of potential difference between the two conducting plates.

2. [ ] Capacitors are devices that store electric charge.

3. [ ] The capacitance of a parallel-plate capacitor is proportional to the area of its plates and inversely proportional to the plate separation.

4. [ ] The equivalent capacitance of a parallel combination of capacitors is always greater than any of the individual capacitance.

5. [ ] The equivalent capacitance of a series combination of capacitors is always less than any individual capacitance in the combination.

6. [ ] The energy density in an electric field is proportional to the cubic of the magnitude of the electric field at a given point.

7. [ ] The capacitance of a capacitor increases, when the region between the plates is filled by a dielectric material.

Explanation / Answer

1. true

2. true

3. true

4. true

5. true

6. false

7. true

1 Q = C*deltaV = 10*1 = 10C 2. definition of capcitor 3. C = e0A/d 4. Ceq = C1+C2>C1 or C2, 5. Ceq = C1C2/(C1+C2) 1 for dielectric

6. u = 1/2 e0E^2, 7 C'= eC e>1 for dielectric

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