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10 questions about power supply and loads, circuits, schematics, series and parallel components

What is the effect for electronic equipment if the power supply produces a very high frequency        output, for example a switching power supply? What causes the filter capacitor on the switching power supply to become bloated? What is the effect of a wave-like fluctuating circuit on an electronic circuit? How can a plastic fan burn when placed in the microwave? Is there a short circuit?  How can a spark come out of the socket when Mr Mehdi plugs the lamp into the socket? What happens if a power supply is connected to a closed circuit with no load? What if capacitors, resistors and inductors are connected in a series or parallel circuit? At the minute "8:17" Mr. Mehdi  said if he add one component in the middle then they are neither series nor parallel. How did it happen? How to arrange series and parallel circuits in a complex circuit? How do I determine the correct and incorrect ICT schema in Google?