Who discovered the phenomenon of nuclear magnetic resonance (NMR), which forms the basis of modern MRI scanners? MCQ with Answer and Explanation

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Who discovered the phenomenon of nuclear magnetic resonance (NMR), which forms the basis of modern MRI scanners?

A. Peter Mansfield

B. Felix Bloch

C. Paul Lauterbur

D. Isidor Isaac Rabi

Answer: Option D

Solution (By JKSSB Mock Tests)

Isidor Isaac Rabi discovered nuclear magnetic resonance in 1938, for which he was awarded the Nobel Prize in Physics in 1944.

This question belongs to: Static General Knowledge Inventions and Discoveries

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The invention of the common computing programming language Fortran (Formula Translation) was directed by whom at IBM?

A. Alan Turing

B. John Backus

C. Dennis Ritchie

D. Grace Hopper

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Correct Answer: Option B

Explanation:
John Backus led the engineering team that developed Fortran in 1957, the first widely used high-level compiled computer language.

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Question #2

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The vaccine for smallpox was developed by whom in 1796?

A. Robert Koch

B. Edward Jenner

C. Alexander Fleming

D. Louis Pasteur

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Correct Answer: Option B

Explanation:
Edward Jenner introduced the smallpox vaccine using cowpox material, pioneering the field of vaccinology.

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Question #3

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Who discovered that the atomic mass of elements can vary within the same identity due to changing neutron levels, establishing 'Isotopes'?

A. Frederick Soddy

B. James Chadwick

C. Ernest Rutherford

D. J.J. Thomson

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Correct Answer: Option A

Explanation:
Soddy introduced the concept of isotopes in 1913, proving that elements can have identical chemical behaviors but different radioactive profiles.

This question belongs to: Static General Knowledge Inventions and Discoveries

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