why reactive power is present in AC not in DC
DC systems also produce magnetic fields in components like inductors, motors, and electromagnets. However, reactive power is a concept specific to AC (alternating current) systems , and here's why DC systems don't have reactive power in the same sense: 1. DC vs. AC Behavior : In AC systems , the current and voltage alternate sinusoidally. As the current and voltage continuously change, inductors and capacitors store and release energy, creating a constant exchange of energy between the source and the reactive components. This exchange is what defines reactive power (Q) in an AC system. In DC systems , the current is constant (steady-state), meaning it doesn't alternate. Once a magnetic field is established in an inductor (like in a DC motor or electromagnet), the field remains constant, and there is no continuous exchange of energy between the source and the inductor, as there is in AC. Therefore, reactive power does not exist in DC . 2. Energy Storage in DC : Wh