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Series resonant circuits have their lowest impedance at the resonant frequency. Parallel resonant circuits have their highest impedance at the resonant frequency. This characteristic is exploited in the design of filters, oscillators and other circuits.
You do not build a series circuit in your home. The only series circuits are the circuits that go through circuit breakers, light switches, and relays. Electrical and electronic devices use internal series circuits but those are the only ones people build. No one builds series circuits for house wiring. Electrical outlets are connected with parallel wiring.
in parallel the voltage stays the same in parallell the current is shared in series the voltage is shared in series the current stays the same the main similarity between parallel and series circuits is when voltage increases, current increases.
There are no disadvantages to the use of parallel circuits in houses. As the rated power of any appliance is dependent upon it operating at its rated voltage, then a parallel connection is the only method of achieving this. Furthermore, in the case of lighting circuits, for example, should one lamp fail, the parallel connection ensures that the remaining lamps will continue to work normally.
Jim use dc supply in oscillator circuits to and ac out put.