Who discovered that the planet Venus has phases similar to the Moon, supporting the heliocentric theory? MCQ with Answer and Explanation

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Who discovered that the planet Venus has phases similar to the Moon, supporting the heliocentric theory?

A. Galileo Galilei

B. Nicolaus Copernicus

C. Johannes Kepler

D. Tycho Brahe

Answer: Option A

Solution (By JKSSB Mock Tests)

Galileo Galilei observed the phases of Venus in 1610 using his telescope, confirming that it orbits the Sun.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who discovered the biological presence of blood platelets and their exact role in physical blood coagulation?

A. William Harvey

B. Giulio Bizzozero

C. Karl Landsteiner

D. Marcello Malpighi

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Correct Answer: Option B

Explanation:
Italian pathologist Bizzozero identified blood platelets ('piastrine') in 1882, describing how they aggregate to plug damaged blood vessels.

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Question #2

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The invention of the flash memory architecture, ubiquitous in USB drives and SSDs, was developed by whom?

A. Fujio Masuoka

B. Douglas Engelbart

C. Tim Berners-Lee

D. Alan Turing

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Correct Answer: Option A

Explanation:
Fujio Masuoka invented both NOR and NAND flash memory while working at Toshiba in the 1980s.

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Question #3

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Who invented the first functional integrated circuit (microchip) in 1958?

A. Jack Kilby and Robert Noyce

B. John Bardeen

C. Alan Turing

D. Douglas Engelbart

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Correct Answer: Option A

Explanation:
Jack Kilby of Texas Instruments constructed the first working monolithic integrated circuit on a germanium chip, winning a Nobel Prize.

This question belongs to: Static General Knowledge Inventions and Discoveries

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