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In an AC circuit through a resistor the voltage and current are said to be in phase. Ie on the oscilloscope in the sine wave as the voltage rises so does the current in tandem. Through an inductor an electromagnetic field is created in the coil which produces a back emf which acts against any change in voltage. This slows down any sharp change in voltage as when a circuit is energised. With an inductor the voltage and current are out of phase. The voltage is said to lead over the current. It is displaced by 90 degrees. It is ahead of the current by 90 degrees on the sine wave.
Through a capacitor the current rises until it is fully charged and then no more current flows. An AC current is constantly changing direction at 50 Hz in the UK. Through a capacitor the current leads over the voltage by 90 degrees in the sine wave. A capacitor can balance out the effect of the inductor. The inductor decreases the power factor, the capacitor increases the power factor. With an inductor a circuit draws more current, with a capacitor the current draw decreases.
P=IxVxPf. Where Pf is the power factor or power correction factor. Factories will have a big capacitor to correct the power factor for induction motors. This improves the electrical efficiency and lowers the electric bill!
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When was the tantalum capacitor invented?
The tantalum capacitor was produced in 1956 by D. McLean and F. Power of the United States, after which it became among the most widely used capacitor types.
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Among others, the filament of an incandescent light bulb is a resistor- which gives off heat and light.
Is flip flop smallest among other memory device?
no, a DRAM capacitor storage cell is. it needs only one MOSFET and one capacitor. much less circuitry than a flip flop and almost no power.
What happens in a bad capacitor?
In essence, a failed (bad) capacitor appears as a "short" in the circuit, as opposed to a failed (open) resistor which appears as a "break". Unless of course the capacitor has exploded - in that case it'll probably be a "break" as well, but don't count on it.It depends on the function of the capacitor. If the capacitor is used to 'smooth out' (filter) unfiltered voltage, this function will be lost and in addition, the capacitor will "load down" the voltage rail it's supposed to smooth out. If, on the other hand, the capacitor is part of an oscillator circuit (be it a standalone oscillator, an oscillator network, or timing source for an integrated circuit), the frequency of the oscillation will be greatly offset from the ideal value, and this may appear as many different problems (instability and lack of synchronisation with signals among others) which wouldn't easily be tracked down to the bad capacitor.If, on the other hand, you were asking about what chemical and physical events take place within the capacitor as it fails, this question should be filed under "Chemistry" or "Physics" at least in additon to, if not in the stead of, "Circuits", and it would be wise to include a word or two asking about the reactions within the electrolyte itself (as most failed capacitors are electrolytic).
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There is no difference between amongst and among. One can use these words interchangeably. Amongst is more of an "old-fashioned" way of saying among. However, among is more popular to use.
What is the difference between among and amongst?
Amongst is more posh from England but among is from the USA.
What is the difference among plants and humans?
vagninas
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What is the major difference among isotopes of an element?
Number of neutrons in the nucleus.
Is there a difference between amid amidst among and amongst?
There is no difference between amid and amidst or among or amongst. amidst and amongst are the obsolete words already replaced by amid and among, however in some cultures these words are still preserved.
What is the Difference among individuals in a population called?
genetic variation
What is the difference between and among job and career in an organization?
Longevity
