A step-up chopper is fed with 200 V. The conduction time of the thyristor is 200 us and the required output is 600 V. If the frequency of operation is kept constant and the pulse width is halved, what will be the new output voltage?

Q: What is the dc output voltage of an unfiltered half-wave rectifier whose peak output voltage is 9.8…

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Q: The diode voltage for a buck converter is 0.6V, the transistor voltage is 0.25V, and the input is…

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Q: A 60 Hz sinusoidal voltage is applied to a single-phase half-wave rectifier. The output of the…

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Q: Determine the peak output voltage and the average value of the output voltage of the rectifier.

A:

Q: What is the effect of shorting the capacitor connected to an SCR anode

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Photoelectric

The photoelectric effect occurs when light (or similar incident radiation, including X-rays) falls on material together with a metal plate and causes it to emit electrons. The discovery of the photoelectric effect led to important new theories (and to a Nobel Prize for Albert Einstein). Photoelectric cells, or photocells, are utilized in burglar-alarm light detectors and garage-door openers (each employs a through-beam of light this is broken when something movements throughout it), and also to play soundtracks on film movies (in which a light beam shines through the soundtrack encoded at the film and is "read" with the aid of the photocells).