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Potential Diff + Cap
Question | Answer |
---|---|
What is potential difference? | The work done in bringing a charge of +1 coulomb from one point to another in an electric field. V = W/Q |
What is potential at a point? | The potential difference between a point and the Earth. |
What is capacitance? | The ratio of change on a conductor to it's potential. C = Q/V --- OR --- Q = CV. |
What is a parallel plate capacitor? | Two identical parallel conducting plates separated by an insulator (dielectric). |
What are the factors that affect the capacitance of a parallel plate capacitor? | 1. Distance between plates. 2. Overlap area of plates. 3. Nature of Dielectric. |
Give two uses of a capacitor. | Tuning radios; flash guns. |
What is the formula for the energy stored in a capacitor? | W = 1/2 CV squared. |