Who formulated the mathematical equations governing the unified theory of electricity, magnetism, and optics? MCQ with Answer and Explanation
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Question #1
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The invention of the common electronic storage method known as the floppy disk was developed by which company?
Correct Answer: Option D
Explanation:
IBM introduced the 8-inch magnetic coated flexible disk system in 1971 to load microcode patches into mainframes.
IBM introduced the 8-inch magnetic coated flexible disk system in 1971 to load microcode patches into mainframes.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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Who is credited with inventing the modern ballpoint pen in 1938?
Correct Answer: Option D
Explanation:
Hungarian journalist László Bíró invented the first commercially successful ballpoint pen, which bears his name ('Biro') in many countries.
Hungarian journalist László Bíró invented the first commercially successful ballpoint pen, which bears his name ('Biro') in many countries.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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Who discovered the exact value of the Earth's circumference using simple trigonometry and shadow lengths during solar eclipses?
Correct Answer: Option A
Explanation:
Eratosthenes calculated the Earth's physical dimensions in the 3rd century BCE by comparing shadow angles in Alexandria and Syene.
Eratosthenes calculated the Earth's physical dimensions in the 3rd century BCE by comparing shadow angles in Alexandria and Syene.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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