## Fundamentals of Electrical Engineering

a.) $-80*sin(20*t- \pi/2)$ b.) $200*cos(100*t)$ c.) $-480*cos(80*t+\pi/6)$ d.) $-300*sin(100*t +\pi/4)$ Units in mA
Start by using the equation $C*\frac{dV}{dt} = i$ to find current in each case In each case take the derivative of the voltage and multiply it by 100uF to get current a.) $i=-100*(40*20*sin(20*t-\pi/2))$ $i= -80*sin(20*t- \pi/2)$ mA b.) $i = 100*(20*100*cos(100*t))$ $i = 200*cos(100*t) mA$ c.) $i = -100*(60*80*cos(80*t+\pi/6))$ $i = -480*cos(80*t+\pi/6) mA$ d.) $i = -100*(30*100*sin(100*t + \pi/4))$ $i = -300*sin(100*t +\pi/4) mA$