Shahab Yousafzai is a professional electrical engineer, who has a history with the field since 2008. He is happy to share his experience and thoughts over the forum. He is interested in Power Electronics, Analog Electronics, and Electric Machines.
Capacitor and inductor oppose current in AC circuit because of inertia of electron motion, which is called capacitive and inductive reactance respectfully.
In RL series circuit, during the inductor charging phase, the voltage across the inductor gradually decrease to zero and the current through the inductor goes to the maximum in five-times constant (5 taus).