12th PHYSICS 7th CHAPTER Alternative current скачать в хорошем качестве

12th PHYSICS 7th CHAPTER Alternative current

⚡ AC Power & LCR Circuits Overview In Alternating Current systems, power delivery depends on the phase angle (\phi) between voltage and current. Average Power is calculated as P = V_{rms}I_{rms}\cos\phi, where \cos\phi is the Power Factor. In purely resistive circuits, power transfer is maximum (\cos\phi=1), whereas in ideal inductive or capacitive circuits, the average power dissipated is zero. The Series LCR Circuit connects Resistance (R), Inductance (L), and Capacitance (C). The total opposition to current is called Impedance (Z): A critical state called Resonance occurs when Inductive Reactance equals Capacitive Reactance (X_L = X_C). At the Resonant Frequency, impedance is minimized (Z=R) and current reaches its peak. This principle is fundamental to how radios tune into specific stations. Popular Tags: #Physics #ACCircuits #LCRCircuit #Resonance #PowerFactor #Impedance #JEEPhysics #NEET #ElectricalEngineering #Class12 #Electricity