An isolated capacitor with capacitance C = 7 An isolated capacitor with capacita

Question

An isolated capacitor with capacitance C = 7 An isolated capacitor with capacitance C = 7 An isolated capacitor with capacitance C = 7 muF has a charge Q = 17 muC on its plate. What is the energy stored in the capacitor? Now a conductor is inserted into the capacitor. The thickness of the conductor is 1/3 the thickness of the capacitor and is centered in between the plates of the capacitor. What is the charge on the plates of the capacitor? What is the capacitance of the capacitor with the conductor in place? What is the energy stored in the capacitor with the conductor in place?

Explanation / Answer

energy = q^2/2c= 17*17/(2*7)=20.64

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