To create lesser e-waste, wireless charging has emerged as a promising solution. Wireless charging works on the principle of:

a) Li-Fi

b) Electromagnetic induction

c) LASER

d) Wi-Fi

Ans – [B]

Wireless charging inductive charging) uses an EM field to transfer energy between two objects. Induction chargers typically use an induction coil to create an alternating electromagnetic field from within a charging  base  station,  and  a  second induction coil in the portable device takes power from the EM field and converts it back into electrical current to charge the battery.