Who invented the first practical alternating current (AC) motor and power transmission system? MCQ with Answer and Explanation

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Who invented the first practical alternating current (AC) motor and power transmission system?

A. George Westinghouse

B. Thomas Edison

C. Michael Faraday

D. Nikola Tesla

Answer: Option D

Solution (By JKSSB Mock Tests)

Nikola Tesla patented the AC induction motor and polyphase system, which revolutionized long-distance electrical grid power distribution.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the existence of the Van Allen Radiation Belts surrounding the Earth?

A. Carl Sagan

B. Wernher von Braun

C. Robert Goddard

D. James Van Allen

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Correct Answer: Option D

Explanation:
James Van Allen discovered the zones of trapped charged particles around Earth using data from the Explorer 1 satellite in 1958.

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Question #2

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The cell was first discovered and named by whom in 1665?

A. Anton van Leeuwenhoek

B. Theodor Schwann

C. Robert Hooke

D. Matthias Schleiden

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Correct Answer: Option C

Explanation:
Robert Hooke discovered plant cells in cork tissue under a primitive microscope in 1665 and coined the term 'cell'.

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Question #3

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The invention of the common synthetic plastic material known as Polyvinyl Chloride (PVC) was optimized by whom?

A. Roy Plunkett

B. Waldo Semon

C. Leo Baekeland

D. Wallace Carothers

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Correct Answer: Option B

Explanation:
Waldo Semon added specialized plasticizing agents to brittle PVC material in the 1920s, transforming it into a flexible, highly useful industrial plastic.

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