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megger are available in ac &dc
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Why dc output voltage of a bridge rectifier varies with the load current?
aA A: the output of a Bridger's rectifier will always follows proportionally to the load since it does not regulate the output it merely transform AC TO DC '
Why is output dc higher than input ac?
Output power can never be more than input power. With a transformer, it is possible to increase the output current (while decreasing the output voltage), or to decrease the output current (while increasing the output voltage).
Is DC voltage and average voltage same?
no, dc volatage is a type of current direct current, ac is alternating current, average voltage could be any type of voltage ac or dc that maintains a constant rangeAnswerNo. A DC voltage is exactly equivalent to an AC rms-voltage. So, for example, 100 V (DC) is exactly equivalent to 100 V (AC rms). The average value of an AC waveform is zero.
Why smps convert ac to dc and again to dc to dc?
first it converts ac to dc as rectifier But the required dc voltage is obtained by taking average of on & off DC input voltage.
How does rectification take place?
Type your answer her rectification takes place due to diode in rectifiers in a hwr only one diode presents it conducts during positive half and give dc out put. in fwr four (or) two diodes will presents based on type but the give both half cycles output ANSWER: A diode will pass an AC voltage trough only one way and refuse to pass the the other half of the AC signal. With just one diode the output will be the AC voltage minus the .7 v drop by the diode this output is called pulsating DC since it has no other component from the AC components in its output. It does no matter which side is rectified the + or the - the result will be either + or - pulsating DC.
Megger testing is done with DC or AC votage?
Earth testing results should be related to the voltage source, i.e., AC in most situations. AC reacts to resistive and reactive loads, DC to resistive loads only. Not all earth testers, however, use AC.
Is output of electric fence charger ac or dc?
The output of an electric fencer is a high voltage pulse of DC voltage.
What type of voltage is the output at the bat terminal of the ac generator?
dc
How do you test a diode bridge?
How to test a diode bridge ? Diode bridge is a device is used to convert an AC signals (say AC voltage) to DC output (say DC voltage). So, to test it, you can apply a AC voltage v = Vm Sin (wt) at its 2 inputs and measure DC output voltage Vdc.
What is DC to DC conversion?
A DC to DC converter is a type of switching regulated powersupply whose input is a DC voltage, it then switches that rapidly to make AC, which is applied to the primary of a transformer, the transformer then either steps up or down the voltage as desired, the AC from the secondary is then rectified and filtered to provide the output DC voltage. Regulation circuitry measures the output DC voltage, continuously adjusting the switching circuits on the input to keep the output constant.Most switching regulated powersupplies are DC to DC converters with a simple unregulated rectifier and filter to convert the input AC to DC. Usually it is called a powersupply when it provides more than one output DC voltage or if its input is AC; whereas it is called a converter only if it provides just one output DC voltage and its input is DC. But most of the circuitry is the same in both cases.
Does the neon power supply for those beer signs in bars output high voltage AC or DC?
High Voltage AC.
What equation is used to calculate the dc output voltage for a given ac input voltage to a step-down transformer?
so far i knew, the transformers are used to seprate dc component from ac component of supply fed into primary winding of coil. still if dc output value of ac input has to be calculated then it is v2*2/sqrt(pi) where v2 is peak ac output voltage and is equal to v1*n2/n1 pi is a constant numerically equal to 3.14 thus the dc value is average value of output ac voltage -------------------sachin_the_rex@aol.in------------------------------
Is the RMS value of the power output of a device running on a certain AC voltage equivalent to the power output of a similar device if it was running on the same voltage but it was DC instead of AC?
Yes.
How do you convert dc to ac current?
The AC current is fed into a rectifier, which is a set of four diodes that force the current at the output to be one direction. A capacitor across the rectifier output is then used to smooth out the voltage to a level higher than the desired DC output (eliminating, for example, the zero-voltage portions of the original AC sine-wave) A voltage regulator then regulates the voltage to a constant level.
Why do you obtain more dc voltage than ac voltage in power supply design by using transformer?
You don't. Transformers only work with AC voltage. Their input will be an AC waveform, and their output will be an AC waveform. Other electronics are used to convert the stepped down AC waveform from the transformer to DC.
How does the variation of excitation of an alternator correct power factor?
The rotor of an alternator need a DC voltage applied to it to generate a magnetic field, this magnetic field will generate the AC power in the AC windings.The AVR(Automatic Voltage Regulator) is regulating this DC voltage so that the magnetic field is strong enough to maintain the output AC voltage. As soon as more current is drawn from the output, this output voltage will drop and a stronger magnetic field is needed to sustain the output voltage, so the AVR step up the exiting voltage to get a stronger magnetic field to compensate for the voltage loss in the AC windings.
Voltage frequency inverter dc or ac output?
An inverter changes a d.c. input to an a.c. output. Inverter is a device to change low volt DC to high volt AC 12 Dc to 220 Ac volt So many type of inverter of watts 500 watt 1000 watt 5000 watt
