KIDS TRIVIA

Detailed explanation-1: -His work on the electromagnetic relay was the basis of the practical electrical telegraph, invented separately by Samuel F. B. Morse and Sir Charles Wheatstone.

Detailed explanation-2: -A reasonable answer to this deceptively simple question is that Henry did not invent the telegraph, but that its invention would have been delayed for many years, if not been impossible, without him. Henry never claimed to have invented a telegraph.

Detailed explanation-3: -His “harmonic telegraph” was based on the principle that several notes could be sent simultaneously along the same wire if the notes or signals differed in pitch. “This model of Bell’s first telephone is a duplicate of the instrument through which speech sounds were first transmitted electrically, 1875” on phone.

Detailed explanation-4: -Joseph Henry was an American scientist who pioneered the construction of strong, practical electromagnets and built one of the first electromagnetic motors.