QJEEM21Phb1c2: JEE Main 2021 Physics - Class 12 JEEM21Phb1c2 Solution: A parallel plate capacitor whose capacitance C is 14 pF is…

A parallel plate capacitor whose capacitance C is 14 pF is charged by a battery to a potential difference V = 12 V between its plates. The charging battery is now disconnected and a porcelin plate with k = 7 is inserted between the plates, then the plate would oscillate back and forth between the plates with a constant mechanical energy of _____________ pJ. (Assume no friction)