Radio was invented by:
Correct answer: A. Marconi
- A. Marconi
- B. Edison
- C. Rutherford
- D. Davison
Explanation
Guglielmo Marconi, an Italian inventor and electrical engineer, is widely credited with the invention of the radio. In the late 19th and early 20th centuries, Marconi conducted experiments in wireless communication and succeeded in transmitting telegraphic signals over long distances without the need for physical wires. He patented his wireless telegraphy system in the late 1890s and conducted successful transatlantic radio communications in the early 1900s. Marconi's work laid the foundation for the development of modern radio technology.
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Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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