Smallest operational vacuum cleaner
The record for making the smallest operational vacuum cleaner was set by Gokul Das (born on April 24, 1998) of Malappuram, Kerala. He made a vacuum cleaner (measuring 1 cm) using a plastic syringe, clock needles, mobile vibration motor, two copper wires, a 3V mobile battery, glue and rubber tape to prevent the entry of air from the sides, as confirmed on April 30, 2022.
