The discovery of the charge-coupled device (CCD), which replaces film with digital sensor pixels in cameras, was made by whom? MCQ with Answer and Explanation

Question

The discovery of the charge-coupled device (CCD), which replaces film with digital sensor pixels in cameras, was made by whom?

A. Willard Boyle and George E. Smith

B. Charles Kao

C. Theodore Maiman

D. Fujio Masuoka

Answer: Option A

Solution (By JKSSB Mock Tests)

Boyle and Smith invented the CCD at Bell Labs in 1969, fundamentally altering digital imaging, which won them a 2009 Nobel Prize.

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Who discovered circulation of blood in the human body?

A. William Harvey

B. Andreas Vesalius

C. Robert Hooke

D. Karl Landsteiner

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Correct Answer: Option A

Explanation:
William Harvey was an English physician who correctly described the systemic circulation and properties of blood being pumped to the brain and body by the heart.

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Question #2

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Who invented the standard mechanical marine propeller that replaced paddle wheels on ships?

A. Charles Parsons

B. Robert Fulton

C. John Ericsson and Francis Pettit Smith

D. James Watt

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Correct Answer: Option C

Explanation:
Ericsson and Smith independently patented efficient screw propeller designs in 1836, enabling faster transoceanic transport.

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Question #3

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Who discovered that elements display unique crystalline patterns when rapidly frozen from molten metal matrices, founding physical Metallurgy?

A. Antoine Lavoisier

B. Henry Clifton Sorby

C. Henry Bessemer

D. Dmitri Mendeleev

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Correct Answer: Option B

Explanation:
Sorby applied microscopic analysis to polished iron and steel samples, establishing microstructure phase boundaries.

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