Who invented the lightning rod and bifocal lenses? MCQ with Answer and Explanation

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Who invented the lightning rod and bifocal lenses?

A. Nikola Tesla

B. Thomas Edison

C. Benjamin Franklin

D. Michael Faraday

Answer: Option C

Solution (By JKSSB Mock Tests)

Benjamin Franklin invented the lightning rod, bifocal spectacles, and the Franklin stove.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who discovered that atomic structure configurations present discrete filling layers regulated by spin exclusion principles?

A. Werner Heisenberg

B. Niels Bohr

C. Wolfgang Pauli

D. Erwin Schrödinger

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Correct Answer: Option C

Explanation:
The Pauli Exclusion Principle states that no two electrons in an atom can occupy the exact same quantum state simultaneously.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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The invention of the common synthetic plastic material known as Polyethylene (LDPE) was an accidental discovery by which chemical company?

A. ICI (Imperial Chemical Industries)

B. DuPont

C. Dow Chemical

D. BASF

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Correct Answer: Option A

Explanation:
Eric Fawcett and Reginald Gibson accidentally produced white waxy polyethylene solid residue while testing high-pressure ethylene reactions at ICI in 1933.

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Question #3

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The invention of the common mechanical steel plow configuration that allowed farming in tough prairie soil was engineered by whom?

A. Walter Hunt

B. Cyrus McCormick

C. Eli Whitney

D. John Deere

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Correct Answer: Option D

Explanation:
Blacksmith John Deere designed a highly polished self-scouring steel plow share blade in 1837.

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