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In fact the energy associated with the __________________┬а oscillates between the element and the rest of the circuit.
reactive power
active power
instantaneous power
apparent power
reactive power
Reactive power refers to the power that oscillates between the source and the load elements (capacitors and inductors) without performing any useful work. In an AC circuit, it is the product of RMS voltage and RMS current multiplied by the sine of the phase angle.
Reactive power refers to the power that oscillates between the source and the load elements (capacitors and inductors) without performing any useful work. In an AC circuit, it is the product of RMS voltage and RMS current multiplied by the sine of the phase angle.
Q=VrmsтАЛIrmsтАЛsin(╧Х) тАФ Definition of reactive power
Q=I2X тАФ Power associated with reactance X
Reactive elements like inductors and capacitors store energy in magnetic and electric fields respectively during one half-cycle and release it back into the circuit during the subsequent half-cycle. Because this energy is exchanged back and forth rather than consumed, the net energy consumption over a full cycle is zero, which is why it is termed 'reactive'.
Reactive power is measured in VAR (Volt-Ampere Reactive).
Inductors absorb reactive power (Q>0), while capacitors supply it (Q<0).
It is responsible for maintaining the voltage levels required for magnetic fields in motors and transformers.
Excessive reactive power increases transmission losses due to higher current flow.
Essential for electromagnetic device operation (motors, transformers).
Enables voltage regulation in power systems.
Increases I2R losses in conductors.
Reduces the effective capacity of power lines and transformers.
Voltage support in transmission lines via SVC/STATCOM.
Power factor correction in industrial loads.
Active power (P=VIcos╧Х) represents the energy consumed or converted to work/heat.
Apparent power (S=VI) is the vector sum of active and reactive power, measured in VA.
Instantaneous power is the product of instantaneous voltage and current, which fluctuates at twice the line frequency.
A is correct тАФ Reactive power represents the exchange of energy between inductive/capacitive elements and the power source without being converted into work.
In exams, always remember that capacitors act as generators of reactive power (Q<0) and inductors act as consumers of reactive power (Q>0).