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Potential difference
Question | Answer |
---|---|
Define potential difference | The work done in bringing a charge of one Coulomb from one point to the other |
What is the unit of potential difference? | The volt |
Define electric current. | A flow of electric charge |
Define potential at a point. | The potential difference between a point and the earth |
Define capacitance. | The ratio of charge on a conductor to its potential |
What is the unit of capacitance? | The farad. |
Name 5 common uses of capacitors. | Functions as a variable capacitor to tune into a radio station. Smooths out variations in current. Camera flash. Allows some frequencies through and blocks others (filtering). Allows alternating current through but blocks direct current. |
What is the name of the insulator in a parallel plate capacitor? | A dialectric |