26. Capacitors & Dielectrics
Parallel Plate Capacitors
26. Capacitors & Dielectrics
Parallel Plate Capacitors
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- Multiple Choice
Two circular plates of radius 2cm are brought together so their separation is 5mm. What is the capacitance of these plates?
1356views21rank1comments - Multiple Choice
A 3 F capacitor is given a potential difference across its plates of 10 V. What is the charge built up on its plates? If the source of the potential difference across the plates is removed, but the plates maintain their charge, what is the new potential difference across the capacitor if the distance between the plates is doubled?
1114views28rank2comments - Multiple ChoiceWhat is the smallest possible capacitance of a parallel-plate capacitor with plate area separated by a distance , if you can fill it with any of the materials listed in Table 21.3?542views1rank
- Multiple ChoiceOne gallon of typical gasoline has 132 MJ of energy. You wish to store that much energy in a parallel-plate capacitor for an electric car. Assume you charge the capacitor using a power source. You can fill the capacitor with any of the materials listed in Table 21.3, but the spacing between plates has to be 0.080 mm. What is the minimum surface area required for the capacitor? This may help to understand challenges in engineering electric cars.397views