Who discovered that electrical currents travel along the exterior surface of a conductor rather than uniformly through its core? MCQ with Answer and Explanation

Question

Who discovered that electrical currents travel along the exterior surface of a conductor rather than uniformly through its core?

A. Michael Faraday

B. James Clerk Maxwell

C. Heinrich Hertz

D. Nikola Tesla

Answer: Option A

Solution (By JKSSB Mock Tests)

Michael Faraday discovered the skin effect and structural shielding principles, leading to the creation of the Faraday Cage.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who is known for inventing the first commercially viable steam engine with a separate condenser?

A. George Stephenson

B. Thomas Newcomen

C. James Watt

D. Robert Fulton

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Correct Answer: Option C

Explanation:
James Watt radically improved the Newcomen steam engine by introducing a separate condenser, driving the Industrial Revolution.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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The invention of the safety razor with disposable stamped steel blades was introduced by whom?

A. Elisha Otis

B. John Loud

C. King Camp Gillette

D. Walter Hunt

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Correct Answer: Option C

Explanation:
King Camp Gillette patented the safety razor system with cheap, replaceable double-edged blades in 1904.

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Question #3

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The invention of the common medical diagnostic device known as the blood pressure cuff (Sphygmomanometer) was optimized by whom?

A. Scipione Riva-Rocci and Harvey Cushing

B. Joseph Lister

C. René Laennec

D. Willem Einthoven

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Correct Answer: Option A

Explanation:
Riva-Rocci introduced the mercury arm-cuff design in 1896, and neurosurgeon Harvey Cushing popularized it globally.

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