GENERAL KNOWLEDGE

Detailed explanation-1: -Tesla’s work on remote control was first shown to the public in 1898. It is one of Tesla’s most important and protected patents and, together with its four-circuit resonance system, forms the basis of wireless communication.

Detailed explanation-2: -In 1898, he developed the first radio-controlled boat, the ancestor of today’s remote-controlled drones. A technological masterpiece, Tesla’s radio-controlled boat illustrates his virtuosity as well as the challenges of inventing something ahead of its time.

Detailed explanation-3: -Tesla invented a new kind of coherer (a radio-activated switch) for this purpose, essentially a canister with a little metal oxide powder in it. The powder orients itself in the presence of an electromagnetic field, like radio waves, and becomes conductive.