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Can SMPS work in DC supply?
Yes. Input DC voltage would be root2 times the input AC voltage.
What logic gate characteristic is the product of the DC supply voltage and the average supply current?
Power Dissipation
Where can a DC exciter be found?
It can be found on an electrical generator set. It is used to supply the DC voltage for the field coils.
How does a rectifier convert AC into DC and what happens to the frequency while the voltage is converted into DC?
An AC electric supply has its voltage continously varying in a sinusoidal pattern at a fixed frequency of 50Hz ( i.e 50 sine waves per sec.) in countries following the British system & 60Hz for the American system. The voltage variation over a single cycle increases from zero to a certain positive maximum voltage & then reduces to zero & follows the same pattern for the negative cycle where the voltage is negative with respect to a reference measurement point. This repeats continously. This AC supply is advantageous for practical reasons of the voltage being easily stepped down ( or up ) with transformers as per the needs of consumers. Also certain AC motors have a very high mechanical conversion efficiency. However there are certain applications where a DC supply ( akin to a continous fixed voltage from a battery ) is required e.g electroplating , DC traction motors which have a very high inherent starting torque. The DC voltage as per requirements is ideally fixed at a certain level ( it can be called a positive or negative voltage , which is essentially determined by the point of reference used for the measurement . The frequency of DC supply is essential zero. DC devices cannot be plugged directly into an AC supply & therefore a Rectifier unit which consists of one ( for very low power application ) or more Electronic Diodes in particular combinations which GATE the AC supply to prevent the voltage excursions of the opposite polarity from reaching the DC device. This rectification gives a DC supply which has some variations called ripple & is not an ideal DC. Depending on the application other components like capacitors or more sophisticated active electronic circuits are used to remove these ripples and improve the DC supply. Most DC devices have supply polarities to be observed i.e the device may not work or get damaged if the DC supply polarity is reversed. It may be noted that almost all electronic circuits work with DC supply , even though outwardly the user may be plugging the device in to an AC supply. If there is a degradation in the DC improvement circuit it will be noticiable as a hum in audio amplifiers or a waving picture on the TV screen in older systems. In modern devices use of special switching power supplies has made it possible to get almost ideal DC.
What is the purpose of dc power?
theperpose of a power supply is to step up or step down an ac voltage to a desired dc value
How is the induced voltage of separately excited dc generator affected if the speed increases?
as speed increases, induced voltage increases
Can SMPS work in DC supply?
Yes. Input DC voltage would be root2 times the input AC voltage.
What happen if the value of the dc supply is changed in amplitude modulation?
The rf output voltage should be proportional to the signal voltage in AM. A change in the DC supply voltage should also cause a proportional change to the rf output voltage.
What is the principal component used to regulate the DC voltage in a DC power supply?
transistor
Volts peak is equals to dc volts?
"Voltage peak" is generally used to denote the maximum(amplitude) of AC voltage supply. It can not be approximated as dc value. The closest approximation one can make for dc value of a ac supply is the RMS(root mean square) value of the voltage. So that the ohmic loss caused by the given AC voltage supply is equivalent to that caused by a dc supply having value equal to the RMS of this AC supply (for given impedance & time).
How do rectifiers and transformers work in a PC power supply?
There is no transformer used in PC power supply. There is rectifier used to rectify or convert AC input voltage into DC output voltage.Transformer based rectifier produces some spikes at the output DC voltage, hencethey uses SMPS (Switch Mode Power Supply) to avoid spikes to the output DC voltage and get a smooth DC voltage.
What logic gate characteristic is the product of the DC supply voltage and the average supply current?
Power Dissipation
What is ac and DC supplies?
AC supply means the supply voltage is alternating one. Supply has some particular frequency and magnitude. e.g. usual power supply to domestic use DC supply means the supply voltage (or current) is not alternating. It is fixed one. i.e. frequency is zero. e.g. batteries
Where can a DC exciter be found?
It can be found on an electrical generator set. It is used to supply the DC voltage for the field coils.
Function of power supply?
to convert AC into DC voltage without fluctuation
What is the expression of the power consumed by an electric appliance fed by a DC?
Power consumed by the appliance = (DC supply voltage) x (DC current)
What happens if a dc supply is given to a transformer under no load?
when dc supply is given to transformer at primary winding , the output at secondary winding will be zero.Because to induce voltage ,countnie changing flux is required ,that can not be obtained from dc supply...........
