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UPSC Prelims 2026Question 81Miscellaneous

X, born in the UK, was conferred the Nobel Prize in 2025. He was a professor in an American university when this prize was announced. Identify ‘X’:

Options

  1. (a)Michel H. Devoret
  2. (b)Richard Robson
  3. (c)John Clarke
  4. (d)Joel Mokyr
Correct answer: c
Decision rule

When clues stack - birthplace, prize, current post - each distractor meets all but one; eliminate on the clue an option fails, not the one it meets.

Explanation


Correct Answer

(c) John Clarke


Explanation of the Correct Answer

The person described in the question is John Clarke.

Clue in the QuestionRelevant Fact
Born in the UKJohn Clarke was born in Cambridge, United Kingdom, in 1942.
Conferred the Nobel Prize in 2025He received the Nobel Prize in Physics 2025.
Professor in an American universityAt the time of the award, he was affiliated with the University of California, Berkeley, USA.

John Clarke was awarded the 2025 Nobel Prize in Physics, along with Michel H. Devoret and John M. Martinis, for the discovery of macroscopic quantum mechanical tunnelling and energy quantisation in an electric circuit. (NobelPrize.org)

Hence, the correct answer is (c) John Clarke.


Why Other Options Are Incorrect

OptionPersonVerdictExplanation
(a)Michel H. DevoretIncorrectHe shared the 2025 Nobel Prize in Physics, but he was not the person matching the clue of being born in the UK.
(b)Richard RobsonIncorrectHe was not the person matching this clue.
(c)John ClarkeCorrectBorn in the UK and affiliated with University of California, Berkeley at the time of the 2025 Nobel Prize.
(d)Joel MokyrIncorrectHe received the 2025 Nobel Prize in Economic Sciences, but he was born in the Netherlands, not the UK.

Relevant Supplementary Information


Table: Nobel Prize 2025 Personalities Mentioned in the Options

PersonNobel Prize / FieldAffiliation / IdentityWhy Relevant Here
John ClarkePhysics, 2025University of California, BerkeleyCorrect answer; born in Cambridge, UK.
Michel H. DevoretPhysics, 2025Yale University / University of California, Santa Barbara association in quantum circuitsCo-recipient of Physics Nobel, but not UK-born.
Richard RobsonChemistry, 2025Associated with metal-organic framework researchDoes not match the UK-born American professor clue.
Joel MokyrEconomic Sciences, 2025Northwestern UniversityEconomics laureate, but born in the Netherlands.

Table: Nobel Prize in Physics 2025

LaureateAffiliation at Award TimeContribution
John ClarkeUniversity of California, BerkeleyDiscovery of macroscopic quantum mechanical tunnelling and energy quantisation in an electric circuit
Michel H. DevoretYale University / University of California, Santa BarbaraSame shared contribution
John M. MartinisUniversity of California, Santa BarbaraSame shared contribution
LaureateCountry / Origin LinkInstitutional AffiliationAwarded For
John ClarkeBritish / UK-bornUniversity of California, BerkeleyMacroscopic quantum mechanical tunnelling and energy quantisation in an electric circuit
Michel H. DevoretFrenchYale UniversitySame shared work
John M. MartinisAmericanUniversity of California, Santa BarbaraSame shared work

Key Takeaways from the Tables

  • John Clarke is the correct answer because he was born in the UK and affiliated with UC Berkeley.
  • The 2025 Physics Nobel was linked to quantum effects in electrical circuits.
  • Michel H. Devoret was a co-recipient, but he does not match the UK-born clue.
  • Joel Mokyr was an Economics laureate, but he was born in the Netherlands.
PointExplanation
John Clarke is the answerHe matches both conditions: UK-born and professor in the USA.
Do not select Michel H. Devoret only because of Physics NobelHe shared the Physics Nobel but was not born in the UK.
Do not select Richard Robson only because he was UK-bornHe does not match the American university clue.
Do not select Joel Mokyr only because of US affiliationHe was born in the Netherlands.
The Physics Nobel 2025 is linked to quantum circuitsThe awarded work is relevant to quantum technology and superconducting circuits.

Context and Current Relevance

  • The 2025 Physics Nobel is important for the development of quantum technologies, including quantum computing and quantum sensing.
  • The work showed that quantum behaviour can be observed in engineered electrical circuits, not only at atomic scales.
  • Such breakthroughs strengthen the scientific foundation of modern superconducting quantum devices.
  • The 2025 Physics Nobel is significant for the foundations of quantum computing and superconducting quantum circuits.
  • It shows how quantum effects can be demonstrated in engineered electrical circuits.
  • For exam purposes, focus on the combined clue: birthplace + Nobel field + institutional affiliation.

Table: Nobel Prize 2025 Laureates Relevant to This Question

PersonNobel Prize 2025 FieldBirthplace / National LinkAffiliation at Time of PrizeWhy Important for This Question
John ClarkePhysicsBorn in Cambridge, United KingdomUniversity of California, Berkeley, USACorrect answer: UK-born and professor in an American university
Michel H. DevoretPhysicsBorn in FranceYale University, USACo-recipient of Physics Nobel, but not UK-born
John M. MartinisPhysicsBorn in the USAUniversity of California, Santa Barbara, USACo-recipient of Physics Nobel, but not UK-born
Richard RobsonChemistryBorn in the UKUniversity of Melbourne, AustraliaUK-born Nobel laureate, but not professor in an American university
Joel MokyrEconomic SciencesBorn in the NetherlandsNorthwestern University, USAProfessor in an American university, but not UK-born

The Nobel Prize official list records the 2025 Physics prize to John Clarke, Michel H. Devoret and John M. Martinis for work on macroscopic quantum mechanical tunnelling and energy quantisation in an electric circuit. (NobelPrize.org)


Table: Common Traps in This Question

TrapWhy It Can ConfuseCorrect Understanding
Michel H. DevoretHe shared the same 2025 Physics Nobel and was affiliated with an American universityHe was not UK-born
Richard RobsonHe was UK-born and a 2025 Nobel laureateHis affiliation was not an American university
Joel MokyrHe was affiliated with Northwestern University in the USAHe was born in the Netherlands
John ClarkeMatches both cluesUK-born and professor at UC Berkeley
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