What experiments did thomis Edison conduct with electricity?

What size conduit for 150amp? What is a stiff bias? What is loading effect in measurement? Why was the radar developed? A de mosfet differs from a jfet in the sense that it has no? How do you isolate fault in a open resistor? How many LED lights can you put on a 20 amp circuit? Can you use a 240V disconnect switch for a 120V AC? What instrument measures alternator output? What is the highest sampling rate if the input frequency is 3 kHz? What did Nikcola telsa invent? What are the advantages of an analog signal? What is the advantage of a bidirectional cable amplifier over a unidirectional cable amplifier? How does the electric distribution panel work? Why current cannot be measured directly using an oscilloscope? Is oil in transformer use for lubrication? In a transformer what induces a current in the secondary coil? Invented toilet system for railroad cars and electric lamppublished book that became guide for lighting engineers? Is SCR is a switch? What is atpv 56.3?