The video tutorial explains the concept of wireless charging, focusing on the principle of electromagnetic induction between a transmitter coil in the charging pad and a receiver coil in the phone. It details how the magnetic field generated by the charging pad induces a current in the phone's receiver coil, charging the battery without wires. The tutorial also discusses the efficiency and limitations of wireless charging, such as the need for precise alignment and short distance. It highlights the Qi wireless power standard, which ensures compatibility across devices, and concludes with an appreciation of the technology's elegance and the role of applied physics.

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