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. Paul Lauterbur

B. Peter Mansfield

C. Felix Bloch

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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Who discovered that the Earth's core is divided into solid inner and liquid outer layers?

A. Andrija Mohorovičić

B. Inge Lehmann

C. Beno Gutenberg

D. Charles Richter

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Correct Answer: Option B

Explanation:
Danish seismologist Inge Lehmann discovered the Earth's solid inner core in 1936 by studying seismic wave travel paths.

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Question #2

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Who discovered that light exhibits particle-like momentum in scattering collisions with electrons, proving photon theory?

A. Max Planck

B. Arthur Compton

C. Albert Einstein

D. Niels Bohr

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Correct Answer: Option B

Explanation:
Arthur Compton discovered the Compton Effect in 1923, providing explicit proof that light acts as discrete localized particles.

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Question #3

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Who discovered that the genetic molecule DNA can transition between stable 'A' and 'B' structural forms depending on relative humidity levels?

A. Maurice Wilkins

B. Rosalind Franklin

C. James Watson

D. Francis Crick

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Correct Answer: Option B

Explanation:
Franklin's meticulous control of humidity during X-ray diffraction isolation yielded the highly detailed 'B-form' structural patterns.

This question belongs to: Static General Knowledge Inventions and Discoveries

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