examples of chapter 15 class12 physics | alternating current 21 | all kpk boards and fbise physics

00:46 Example 15.4 A 318 uF capacitor is connected across a 220 volt 50 hertz system. Determine a. Capacitive reactance b. RMS value of current c. Equation for voltage and current 09:16 Example 15.5 A coil having a resistance of 7 ohm and an inductance of 31.8 Milli Henry is connected to 220 volt 50 hertz supply. Calculate a. The circuit current b. Phase angle c. Power factor d. Power consumed 19:10 Example 15.6 100 volt 50 hertz AC supply is applied to a capacitor of capacitance 79.5 uF connected in series with a non inductive resistance of 30 ohms. Find a. Impedance b. Current c. Phase angle d. Equation for the instantaneous value of current 28:48 Example 15.7 A 220 volt 50 hertz AC supply is applied to a coil of 0.06 Henry inductance and 2.5 ohm resistance connected in series with 6.8 u f capacitor. Calculate a. Impedance b. Current c. Phase angle between current and voltage d. Power factor and power consumed