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It would be unity, or 1.0. Since the voltage in a DC circuit does not vary with time, there can be no phase displacement of the current waveform, and therefore the current could not lead or lag the voltage waveform.
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What are the applications of variable DC power supply?
variable dc supply are used to get desired amount of dc supply
How does an ac power source differ from a dc power source?
AC power sources are the adapter power sources. DC power sources are the direct power sources. DC stands for direct current, meaning it is a direct source of energy., and AC stands for alternating current, which means it is a secondary source of power.
How many watts is being used by a motor pulling 13.1 amps at 220 v?
The formula you are looking for is Watts = Amps x Volts. However, since the electricity is (probably) AC (wall power), you need to add an additional factor called "power-factor" because "AC" power doesn't work exactly like DC (battery) power. So the formula becomes Watts = Amps x Volts x "power-factor" - where the power factor is a decimal fraction somewhere between zero and one. Note that power factor is never larger than 1.0. Since the true power (multiplied by the power-factor) is always less than the "apparent power" (volts time amps without power-factor) you can use apparent power (also called "VA" - "Volt-Amperes" as a rough approximation. Unfortunately - in the case of a motor, the power-factor is not constant. It varies rather widely based on both speed and load, so if you need to know the EXACT power, you need a direct-reading AC watt-meter. If you want a closer approximation to "true power" - and you don't know the exact power factor - you can approximate it by multiplying "apparent power" by 0.71.
How does DC power work in a power plant?
well u just have to fart and it will work ugly person
Does RCD works on DC system?
Yes.but you should use DC RCD
Power factor of dc ballast is 0.8. what will be the power factor same ballast in AC?
Power factor is an AC only term, and has no meaning for DC.
Is it possible to measure power factor for dc system?
noAnswer'Power factor' is a quantity associated with alternating-current systems, and does not apply to direct-current systems'.
Why dc supply is a unity power factor?
Power factor is a measure of the ratio between the "True Power" and the "Apparent Power" of a system. THe variation from unity arises from the effect of certain components (namely capacitors and inductors) on an AC waveform, causing a phase shift between the current and the voltage. As a DC supply does not suffer from these reactive losses there is no reactive power and the current and voltage are always "in phase". With a phase angle of 0 degrees, the power factor is the cosine of the angle... cos 0 = 1 therefore unity power factor!
What does difference between Watt and Volt ampare?
No difference in case of DC. In case of AC Watt refers to Power which includes the factor of power factor. VA does not include power factor.
Why is use of capacitor in power system?
A capacitor in a power system is used 1.) to increase effective power factor, and 2.) to increase stability in response to transient load changes.Since the category is Electrical Engineering, answer 1 is probably more common, unless you are talking about a DC power supply.
How you improve power factor in synchronous motor?
Power Factor measures the difference in phase between the current and voltage. When they are in phase the Power Factor is defined as 1. When out of phase the value is less than 1. If they are 180 degrees out of phase the Power Factor will be zero.
What is the component of the system unit that coverts AC power into DC power?
Rectifier
Can direct current kW be converted to KVA?
With a dc system the kW are always equal to the kV times the amps. It's only with ac that the kW are usually less than the kVA by a factor called the power factor.
Why DC current used largely?
in case of dc losses are very less than in case ac,as power factor is 1
Why there is no reactive power in DC system?
In case of dc there is no reactive components and current drawn from the supply is in phase with the voltage.due to absence of inductor and capacitor the reactive power demand in dc is zero.
Power equals voltage times what?
In DC, power equals voltage x current. In AC, power equals voltage x current x power factor. The power factor is an adimensional constant, and in common circuits it is often close to 1.
What is a utilization factor with respect to solar power?
Two possibilities: With respect to a single Solar PV Panel: Utilization Factor = efficiency of a solar panel (Energy captured out of energy available) With respect to an entire Solar PV System: Utilization Factor = Ratio of DC in solar panels to AC inverter rating. Typically a 1.15-1.18 utilization factor is desired. This accounts for 1. DC line loss from the panel to the inverter 2. Degradation of solar panels over the system lifespan 3. Non-tracking systems use extra DC from panels when the sun is not direct
