Who is credited with the invention of the telephone?
- A.Samuel Morse
- B.Alexander Graham Bell
- C.Guglielmo Marconi
- D.Thomas Alva Edison
Correct answer
Explanation
The correct answer is B, Alexander Graham Bell. Bell received the patent for the telephone in 1876 and made the first call over a wire, carrying the human voice itself rather than a code. Option A is wrong because Samuel Morse built the electric telegraph in 1837 and gave the dot and dash code that bears his name, which sent messages but not speech. Option C is wrong because Guglielmo Marconi developed practical wireless telegraphy in the 1890s and sent signals across the Atlantic in 1901, again as code and without wires. Option D is wrong because Thomas Alva Edison, though he improved the telephone transmitter, is remembered for the practical electric bulb and the phonograph. The examiner keeps Morse and Marconi in the options precisely because all three men worked on sending messages over a distance.
Read the full article: Inventions and Inventors: Pairs, Years and Exam PYQs
Practice Questions
View allWhat did Wilhelm Conrad Roentgen discover?
- A.Conservation of electric charge
- B.Electric bulb
- C.X-Rays
- D.Thermodynamics
Show answer
Roentgen, a German physicist, noticed in 1895 that a screen in his darkened laboratory glowed while a covered discharge tube was running, and he named the unknown radiation X-rays.
Read the full explanation →Who is called the father of immunology?
- A.Robert Koch
- B.Louis Pasteur
- C.Edward Jenner
- D.Karl Landsteiner
Show answer
In 1796 Jenner showed that material from a cowpox sore protected a boy against smallpox, the first deliberate vaccination, and the word vaccine itself comes from vacca, the Latin for cow.
Read the full explanation →Which one of the following pairs is NOT correctly matched?
- A.Vitamin A - McCollum
- B.Vitamin B - McCollum
- C.Vitamin C - Albert Szent-Gyorgyi
- D.Vitamin D - Paul Muller
Show answer
Paul Hermann Muller is remembered for showing that DDT kills insects, work for which he received a Nobel Prize in Physiology or Medicine; vitamin D is associated with Edward Mellanby, who linked its absence to rickets, and with Adolf Windaus, who worked out its chemistry.
Read the full explanation →Dynamite, whose inventor endowed a set of international prizes, was invented by:
- A.Alfred Nobel
- B.Rudolf Diesel
- C.Michael Faraday
- D.James Watt
Show answer
The Swedish chemist Alfred Nobel patented dynamite in 1867, a safe way of handling nitroglycerine, and the fortune he made from explosives endowed the Nobel Prizes, first awarded in 1901.
Read the full explanation →Penicillin, the first antibiotic, was discovered in 1928 by:
- A.Joseph Lister
- B.Alexander Fleming
- C.Jonas Salk
- D.Robert Koch
Show answer
Fleming noticed in 1928 that a mould of the genus Penicillium had killed the bacteria growing around it on a culture plate, and the substance he named penicillin became the first antibiotic; Florey and Chain later turned it into a usable drug and shared the Nobel Prize with him.
Read the full explanation →