What is electroporosis?

Why a two winding transformer is used instead of single winding transformer? What is the difference between type ac and type act armored cable? Does shunt trip breaker use for load shedding? Can the ground wire from two separate circuits (one 20-amp one 15 amp) be shared? What is the zener region? How do I install a porch light after the vinyl siding is up? Is there any difference which printed circuit board you choose? What check should be done to an electrical measuring device before attempting to measure electrical resistance? What is photonic bandgap? What is symbols of zener diode? What is a difference between ground fault and earth fault? Junction field effect transistor biasing? Define energy meter? What would happen to you if you were on an isolated stand and your potential were increased by 10kilo volts with respect to earth? Does a digital multimeter have a built-in voltage standard? What is the concept of the kelvin bridge circuit? Is electricity man made? Which of the following is not a basic component of an emf emitter? Load-cell is what? How do you Ground a 3 wire service?