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Two parallel plates of 120 cm2 are connected to a battery that provides them with a...

Two parallel plates of 120 cm2 are connected to a battery that provides them with a voltage of 12 volts. The plates are separated by a 1.0 mm thick layer of air. If the space between the plates is filled with oil, with a dielectric constant it is 4 and a dielectric strength of 12x106 v / m; and then the battery stays connected:
a) How much is the capacitance?
b) How much is the voltage across the capacitor? Explain
c) How much is the charge now?
d) How much is the electric field? Can the oil be ionized? Explain.
e) How much is the stored electrical energy?
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