Inventions MCQs

✅ The correct answer is option B.
He was an Italian scientist, and he invented the battery in 1800.

✅ The correct answer is option D.
In 1904, John Ambrose Fleming invented the first practical electron tube called the ‘Fleming Valve’, which is a diode rectifier. In 1906, Lee de Forest invented the audion later called the triode, which provided signal amplification.

✅ The correct answer is option C.
Invented in 1939.

✅ The correct answer is option A.
Lewis Edson Waterman patented the first practical fountain pen in 1884.

✅ The correct answer is option C.
As you have noticed in pictures, many Egyptians have head coverings, sometimes with beads in them. The first wigs were created to cover the head from the hot sun.

✅ The correct answer is option C.

✅ The correct answer is option A.
Birchall’s of Launceston in Tasmania started selling the world�s first notepads, calling them ‘Silvercity Writing Tablets’ after J A Birchall thought it would be a good idea to back sheets of paper with cardboard and glue them together at the top. His British paper suppliers weren�t so keen, but, they were persuaded by Birchall that it was a good idea!

✅ The correct answer is option A.
Milk Tray was introduced in 1915 in open boxes arranged on wooden trays. Today, with its distinctive purple and gold cartons and popularised by the “Man in Black” television adverts, its one of the most popular chocolate assortments.

✅ The correct answer is option A.
On December 23, 1947, William Shockley, Walter Brattain and John Bardeen, of Bell Labs, announced their discovery of the point-contact germanium transistor to management.

✅ The correct answer is option A.
Genetic Engineering, the technique of DNA cloning was perfected by Stanley Cohen and Herbert Boyer in 1973.