General Knowledge MCQs
Topic Notes: General Knowledge
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
41
Who invented the cinema (Cinematograph)?
Answer:
The Lumière Brothers
Auguste and Louis Lumière patented the Cinematograph in 1895, a device that could record, develop, and project motion pictures.
42
Who invented the transformer and electric motor?
Answer:
Michael Faraday
Michael Faraday discovered electromagnetic induction, which led to the invention of the electric motor and the transformer.
43
Who invented the sewing machine?
Answer:
Elias Howe
While others had early designs, Elias Howe was awarded the first U.S. patent for a sewing machine using a lockstitch design in 1846.
44
Who invented the helicopter?
Answer:
Igor Sikorsky
Igor Sikorsky is credited with designing and flying the first viable American helicopter, the VS-300, in 1939.
45
Who discovered the law of buoyancy (Eureka moment)?
Answer:
Archimedes
Archimedes discovered the principle of buoyancy (Archimedes' principle) allegedly while taking a bath.
46
Who is the inventor of the USB (Universal Serial Bus)?
Answer:
Ajay Bhatt
Ajay Bhatt, an Indian-American computer architect at Intel, led the team that created the USB standard.
47
Who invented the mercury thermometer?
Answer:
Daniel Gabriel Fahrenheit
Daniel Gabriel Fahrenheit invented the mercury-in-glass thermometer in 1714.
48
Who is credited with discovering the concept of 'Zero' as a number?
Answer:
Aryabhata / Brahmagupta
The concept of Zero as a number and a placeholder is attributed to ancient Indian mathematicians, notably Brahmagupta and Aryabhata.
49
Who invented the revolver?
Answer:
Samuel Colt
Samuel Colt patented the first commercially successful revolving cylinder pistol (revolver) in 1836.
50
Who invented the modern air conditioner?
Answer:
Willis Carrier
Willis Carrier invented the first modern electrical air conditioning unit in 1902.