Question

NOTE: in this exercise, please enter integers (i.e. whole numbers) for your answers, thus discarding rules regarding significant digits. The flat plates of a capacitor are 2.00 cm apart and each plate has an area of 2000 cm2. The space between the plates is filled with air. The capacitor is connected to a power supply with a potential difference of 240 V. What is the magnitude of the electric field between the plates? N/C You disconnect the capacitor from the power supply, and subsequently insert an insulating dielectric material between the plates of the capacitor. In this process, the capacitor has remained insulated and no conductor has touched the capacitor. The potential difference becomes 120V after the insertion of the dielectric. Calculate the capacitance (in pF) of the capacitor and the energy (in nj) stored in the capacitor after the dielectric is inserted. The capacitance The stored energy is You want to increase the capacitance even further. With which of the following materials (as dielectric) can you achieve the largest capacitance? (Assume room temperature.) O Polyethylene O Mica Teflon Benzene In the end you opt for pyrex glass for your dielectric. At which voltage (to be delivered by a power supply) will pyrex glass become a conductor?