A capacitor which has a capacitance of 1 farad (F) will:
Correct answer: B. Store 1 coulomb of charge at potential difference of 1 volt
- A. Be fully charged in 1 second by a current of 1 Ampere
- B. Store 1 coulomb of charge at potential difference of 1 volt
- C. Gain 1 joule of energy when 1 coulomb of charge is stored on it
- D. Discharge in 1 second when connected across a resistor of resistance 3 ohms
Explanation
A capacitance of 1F produces 1V of potential difference for an electric charge of one coulomb (1C). This statement also fully agrees with the formula C=Q/V.
This question appeared on the ETEA MDCAT 2013 paper, which you can sit online with every answer explained.
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About Capacitors
Capacitors store electric charge and energy in an electric field between conductors. Work includes capacitance, the relation Q = CV, dielectric materials, charging and discharging, energy formulas, and combinations of capacitors in series and parallel. Electric potential difference is needed to understand why charge and stored energy change.
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