Who invented the alkaline storage battery and the phonograph? MCQ with Answer and Explanation
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Question #1
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The invention of the first practical automatic electronic computational tracking engine, the Colossus, was engineered by whom?
Correct Answer: Option D
Explanation:
Tommy Flowers designed the thermionic valve-based Colossus computer for British codebreakers at Bletchley Park to crack German Lorenz ciphers.
Tommy Flowers designed the thermionic valve-based Colossus computer for British codebreakers at Bletchley Park to crack German Lorenz ciphers.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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Who discovered the specific mathematical formula detailing gas density variation relative to molecular weight, known as the diffusion law?
Correct Answer: Option C
Explanation:
Graham's Law states that the rate of effusion or diffusion of a gas is inversely proportional to the square root of its molecular mass.
Graham's Law states that the rate of effusion or diffusion of a gas is inversely proportional to the square root of its molecular mass.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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The invention of the common electronic LED (Light Emitting Diode) operating in the visible light spectrum was developed by whom?
Correct Answer: Option B
Explanation:
Nick Holonyak invented the first practical visible-spectrum (red) light-emitting diode in 1962 while working at General Electric.
Nick Holonyak invented the first practical visible-spectrum (red) light-emitting diode in 1962 while working at General Electric.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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