Even at no-load, a transformer draws current from the mains. Why?
What is PLL? Explain its operation with a block diagram. Answer : PLL - A phase-locked loop or phase lock loop is a control system that generates an output signal whose phase is related to the phase of an input signal Block diagram ... to the input frequency. The phase - locked loop goes through three states free running capture and phase lock. ...
Describe the difference between an open circuit and a short circuit. Answer : Open circuit means the wire is cut meaning power will not flow and close circuit means wire is not cut and hence power will flow.Short circuit is the same as close circuit...
Is the power line voltage available in our homes a dc or an ac voltage? Answer : The power line voltage available in our homes is AC. Mobile dwellings are the most commonly DC-supplied homes and even then they tend to include AC supply for heavier loads....
In a metal conductor, what is a free electron? Answer : When many atoms are close together in a copper wire, the outermost orbital electron of each copper atom can easily break free from its home or parent atom. These electrons then can migrate easily ... random. Such electrons that can move freely from one atom to the next are called free electrons....
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