Who discovered the positron (the antiparticle of the electron) in 1932? MCQ with Answer and Explanation

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Who discovered the positron (the antiparticle of the electron) in 1932?

A. Carl Anderson

B. James Chadwick

C. Robert Millikan

D. Paul Dirac

Answer: Option A

Solution (By JKSSB Mock Tests)

Carl David Anderson discovered the positron using a cloud chamber to analyze cosmic rays, confirming Paul Dirac's theoretical prediction.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who discovered that certain types of biological fungal spores prevent bacterial cell wall cross-linking, identifying Penicillin's mechanism?

A. Alexander Fleming

B. Robert Koch

C. Howard Florey and Ernst Chain

D. Louis Pasteur

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Correct Answer: Option C

Explanation:
While Fleming discovered penicillin, Florey and Chain isolated and purified the molecule for medical treatment, sharing the 1945 Nobel Prize.

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Question #2

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Who discovered that malaria parasites mature within the gastrointestinal tract of Anopheles mosquitoes, winning a Nobel Prize in 1902?

A. Charles Laveran

B. Sir Ronald Ross

C. Robert Koch

D. Louis Pasteur

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Correct Answer: Option B

Explanation:
Sir Ronald Ross proved the vector transmission cycle of malaria while working in Secunderabad, India.

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Question #3

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Who invented the first thermionic valve (vacuum tube diode) in 1904?

A. Nikola Tesla

B. Lee de Forest

C. John Ambrose Fleming

D. Thomas Edison

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Correct Answer: Option C

Explanation:
John Ambrose Fleming invented the oscillation valve, the first vacuum tube diode, which transformed radio technology.

This question belongs to: Static General Knowledge Inventions and Discoveries

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