The voltage and current at the terminals of the circuit element are zero for t<0. For t greater than or equal to 0, they are:
v=50e^-1600t - 50e^-400t (volts)
i=5e^-1600t - 5e^-400t (mA)
Find
1. the power at t =625 us.
2. How much energy is delivered to the circuit element between 0 and 625 us
3. Find the total energy delivered to the element.