A parallel plate capacitor having a plate area of 0.70 m2 and a plate separation of 1.0 mm is connected to a source with a voltage of 50 V. Find the capacitance, the charge on the plates, and the energy of the capacitor b) when the capacitor contains polystyrene
1. The capacitance of the parallel plate capacitor is given as follows:
where is the electric constant, is the permittivity of polystyrene, is the area of the plates, and is the distance between the plates.
Thus, obtain:
2. The charge on the plates (on one plate) is:
where is the voltage of the source. Thus, obtain:
3. The energy stored in the capacitors is:
Answer. a) , b) , c) .
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