A 100 F ultracapacitor was fully charged to 2.7 V. The open circuit terminal voltage was measured to be 2.6 V after exactly 8 hours from the time it was charged.
a) Estimate the leakage current, the equivalent parallel resistance Rp, and the self-discharging time constant of the capacitor assuming the discharge over the 8 hours was linear. (6 marks)
b) How long will it take for the supercapacitor to lose 63% of its charged voltage if the discharge is exponential? (4 marks)