Who is credited with the invention of the submarine 'Turtle', used in military action? MCQ with Answer and Explanation

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Who is credited with the invention of the submarine 'Turtle', used in military action?

A. David Bushnell

B. John Philip Holland

C. Cornelis Drebbel

D. Robert Fulton

Answer: Option A

Solution (By JKSSB Mock Tests)

David Bushnell invented the Turtle in 1775, the first submarine ever used in combat.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who invented the modern electronic television system utilizing a cathode ray tube (CRT)?

A. Philo Farnsworth

B. Thomas Edison

C. Guglielmo Marconi

D. John Logie Baird

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Correct Answer: Option A

Explanation:
Philo Farnsworth invented the first fully functional all-electronic television system with an image dissector camera tube.

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Question #2

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Who discovered that the element Thorium is radioactive, independently of Marie Curie's tracking experiments?

A. Gerhard Carl Schmidt

B. Otto Hahn

C. Ernest Rutherford

D. Henri Becquerel

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Correct Answer: Option A

Explanation:
Gerhard Carl Schmidt discovered thorium's radioactivity in 1898, publishing his findings just weeks before Marie Curie.

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Question #3

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Who discovered that solar light presentation presents distinct missing dark absorptive band lines, establishing the Fraunhofer Lines?

A. Robert Bunsen

B. Joseph von Fraunhofer and William Hyde Wollaston

C. Gustav Kirchhoff

D. Isaac Newton

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Correct Answer: Option B

Explanation:
Wollaston observed early dark bands, and Fraunhofer mapped over 570 lines precisely using customized optical spectroscopes in 1814.

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