How did 2 + j8ohms become 2 + 2 + j8ohms and then 8.9 ∠63.4? Like what did you do and why?

A half-wave rectifier, similar to that of Figure 9.25in the text, is used to provide a DC supply to a 220-load. If the AC source voltage is 25 V (rms), find thepeak and average current in the load. Assume an idealdiode.

Could you please go more in depth about how to create the ac equivalant model? thank you

Define Model electrical and mechanical systems in state space ? and give an examples

Please solve 9.6

Derive an expression for Vout as a function of Vin, where Vin is the nodes connected to the Waveform Generator signal. Show your equations below, either typed or a picture of your handwritten work.

The specific capacitance in F/g can be estimated by using both cyclic voltammetry curves atdifferent voltage scan rate and Galvanostatic charge-discharge curves. The following graphshows the charge-discharge curves of a typical MnO2 pseudocapacitive electrode. There is acharge drop in the voltage at the onset of the discharge curve (one such drop is denoted bydeltaV2). What is the reason behind it?

I'm confused, please help with some explanation. Thank u

please answer with explanation.. answer it ASAP..