what is difference between active and reactive power?
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The most significant difference between the active and reactive power is that the active power is the actual power which is dissipated in the circuit. Whereas, the reactive power is the useless power which only flows between the source and load.
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Active components include amplifying components such as transistors, triode vacuum tubes (valves), and tunnel diodes. Passive components can't introduce net energy into the circuit. They also can't rely on a source of power, except for what is available from the (AC) circuit they are connected to.
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Active hub strengthen the signal where passive hub repeat/copy signals. Active hub need Electricity whereas passive hub work without it. ... Passive hub is just a connector which connects wire coming from other devices. Active hub is multi-point repeater with capability of regeneration of signals.
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An active device is one that is able to impose the voltage or the current in a given circuit. ... OPAMP (operational amplifier), BJT, JFET (transistors), it is called active devices, because of its ability to manipulate and maintain voltage or constant current (within specified operating ranges, unlike the ideal elements).
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(b) The difference between passive flux and active flux is that passive flux only protects the cleaned surface while active flux cleans and protects the surface.
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The difference between active and passive speakers: Active speakers have an in-built power amplifier and just need a power source (or battery) to operate, where passive speakers require an external power amplifier to operate. In short, you need an amplifier for passive speakers, you don't with active speakers.
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1. DC power is significantly more energy efficient than AC power. DC motors and appliances have higher efficiency and power to size characteristics. DC-based lighting (LED) is as much as 75% more efficient than incandescent lighting.
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This voltage controlling mechanism is done by the Automatic Voltage Regulator (AVR). Behind this mechanism, the AVR controls the reactive powers demanded by loads. To control the reactive power output, it is needed to control the excitation current.
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Line and load reactors- Reactors are used to provide current limiting. Reactors oppose rapid changes in current and hence limit spikes as a result of current pulses. Passive harmonic filtering - Uses a combination of reactors and capacitors to filter out harmonic frequencies.
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Used to express reactive power in a circuit. 1000 Volt Amps Reactive (VAR) = 1 kiloVolt Amps Reactive (kVAR). Usually used to express power in all forms, but is reserved to express real power. 1000 Watts (W) = 1 kiloWatt (kW).
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The crucial difference between voltage amplifier and power amplifier is that a voltage amplifier increases the voltage level of the applied input signal. As against, a power amplifier is the one that boosts the power level of the input signal.
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AC is much easier (therefore cheaper) to step up and down in voltage than DC, and can be done more efficiently (typcially, currently) than the much more expensive and complex DC step-up/step-down systems. That is why AC is used for mains power transmission at a national level.
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In a nutshell, active components can, generally speaking, inject power into a circuit and are capable of electrically controlling and amplifying the flow of electrical current, whereas passive components cannot. Unlike active components, passive components either consume or store energy.
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Key Differences between Active and Reactive Power The active power is the real power consumes by the load. ... Whereas, the reactive power is the product of voltage and current and the sine of the angle between them. The active power is the real power, and it is measured in watts.
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An active network contains at least one voltage source or current source that can supply energy to the network indefinitely. A passive network does not contain an active source. ... They consist of passive elements like resistors and capacitors.
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Active satellite can generate power for its own operation. It is known as active repeater due to its functionality. Passive Satellite : The passive satellite is a reflector which receives the signal from the transmitting earth station and scatters the signal in all the directions.
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Reactive/Inductive Load – An inductive load converts current into a magnetic field. Inductive reactance resists the change to current, causing the circuit current to lag voltage. Examples of devices producing reactive/inductive loads include motors, transformers and chokes.