0
Why is active power observed in capacitive and inductive circuits during practical experiments?
Wiki User
∙ 13y ago
An ideal inductor only has inductance. And ideal resistor only has resistance. And an ideal capacitor only has capacitance.
In real life, however, all 3 have some amount of the characteristics of the others. So, in an inductive or capacitive circuit you should only have apparent power in theory, but in an actual circuit you will have resistance from the inductor or capacitor and from the conductors that connect them. This resistance is where the true power is dissipated.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Different types of power factor in different circuits?
The different types of power factor are: # Leading ( Due to Capacitive Circuit) # Lagging (Due to Inductive Circuit) # Unity (Due to Resistive Circuit)
In RC circuits the voltage leads the current?
Inductive. Used to remember this by "Eli" the "ice" man. "(e) Voltage (l) (Inductive circuit) (i) current", the ,"(i) Current (c) (capacitive circuit) (e) voltage, man.
What is AC voltage terminology - in phase - mean?
If the current rises and falls with the voltage, then the two are said to be 'in phase'; this occurs in a purely-resistive circuit. For inductive or capacitive circuits, the current either lags or leads the voltage.
What is meant by leading and lagging pf?
Power Factor is the ratio of true vs apparent power, and comes into play with a reactive (inductive or capacitive) load. A purely resistive load, such as a light bulb or toaster, will have a power factor of 1 because the current is in phase with the voltage. An inductive load, however, such as a motor, will have a power factor less than 1 because the current lags the voltage. You could also have a capacitive load, with a power factor less than 1, but in this case the current leads the voltage.AnswerThe terms, 'leading' and 'lagging' refer to whether a circuit's load current is leading or lagging the supply voltage. Current will 'lead' in resistive-capacitive (R-C) circuits, and 'lag' in resistive-inductive (R-L) circuits. So, a 'leading power factor' indicates a leading current, and applies to R-C circuits, while a 'lagging power factor' indicates a lagging current, and applies to R-L circuits.
Is converting ac to watts and dc to watts the same watts equals volts times amps?
Yes, watts is still volts times amps, for both ac and dc circuits. The complexity lies in the phase angle between voltage and current. If the circuit is purely resistive, the phase angle will be zero. If the circuit is capacitive or inductive, the the phase angle will vary, depending on frequency and on how much capacitive or inductive reactance there is. The difference comes into play when you consider true versus apparent power.
What is phase angle in ac?
It's the amount by which voltage leads current (or vice versa) in the AC circuit. By convention, the phase angle is positive in inductive circuits (where voltage leads current) and negative in capacitive circuits (where current leads voltage).AnswerUnfortunately, the original answer has things the wrong way around. By definition, phase angle is the angle by which the current leads or lags the supply voltage (not the other way around). Therefore, the phase angle is considered negative (current lagging) for an inductive circuit, and positive (current leading) for a capacitive circuit. This is because, for a phasor diagram, counterclockwise is the positive direction, whereas counterclockwise the the negative direction.
Why capacitor is said to be a reactive component?
In electrical or electronic circuits, impedance can be said to have capacitive or inductive components. Capacitors cause capacitive impedance, and coils (chokes, transformers, loudspeakers, etc.) cause inductive impedance. A capacitor is said to be a reactive component in an AC circuit because it holds charge, then releases it, causing a phase shift in the output current. This phase shift in current equates to a phase shift between current and voltage. Reactive power is defined as a phase shift between current and voltage.
How do you shift an ac phase?
It really does depend upon what you mean by 'shift'. For purely-resistive circuits, the load current is in phase with the supply voltage. For reactive circuits, the load current will lead or lag the supply voltage; for capacitive-resistive circuits, the load current leads, whereas for inductive-resistive circuit, the load current lags. You can change the angle by which the current leads or lags (the 'phase angle') by changing the amount of resistance or reactance.
What has the author Albert Y Teng written?
Albert Y. Teng has written: 'Experiments in logic and computer design' -- subject(s): Experiments, Logic circuits, Circuits, Computers 'Experiments in logic and computer design'
Why do you use a variable resistor?
The characteristics of some circuit components cannot be predicted with complete accuracy. Variable resistors are provided in circuits involving these components sometimes to make up for these unavoidable variations.Variable resistors are often used to make it possible for users set suitable volumes in headphones and speakers.Variable resistors may be used to set time constants in circuits that also include capacitive or inductive elements.
What has the author John Potter Shields written?
John Potter Shields has written: 'Basic piezoelectricity' -- subject(s): Piezoelectricity 'Novel electronic circuits' -- subject(s): Amateurs' manuals, Electronics 'Abc's of radio-frequency heating' -- subject(s): Induction heating 'Novel experiments with electricity' -- subject(s): Electricity, Experiments, Magnetism 'Practical power-supply circuits' -- subject(s): Electronic apparatus and appliances, Electronic circuits, Power supply
When does power consumed in an ac circuit becomes zero?
The power consumed in an AC circuit becomes zero when the voltage and current are in phase with each other. This means that the voltage and current waveforms reach their maximum and minimum values at the same time, resulting in a power factor of 1. In this case, the power consumed by the circuit is purely reactive and does not contribute to any real power dissipation.
