Who discovered that the element Uranium emits invisible energy streams, opening the radioactive field before Marie Curie? MCQ with Answer and Explanation

Who discovered that the element Uranium emits invisible energy streams, opening the radioactive field before Marie Curie?

A. Henri Becquerel

B. Ernest Rutherford

C. J.J. Thomson

D. Wilhelm Röntgen

Answer: Option A

Becquerel left uranium compounds in a dark desk drawer with unexposed photographic plates, discovering they fogged without light exposure.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1 Report Error

Who invented the first practical electronic synthesizer instrument, altering modern music composition?

A. Thomas Edison

B. Leo Fender

C. Robert Moog

D. Laurens Hammond

Correct Answer: Option C

Explanation:
Robert Moog invented the Moog synthesizer in the 1960s, introducing voltage-controlled modular electronic instrumentation.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2 Report Error

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. Louis Pasteur

D. Robert Koch

Correct Answer: Option B

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

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3 Report Error

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

A. James Watt

B. Charles Parsons

C. John Ericsson and Francis Pettit Smith

D. Robert Fulton

Correct Answer: Option C

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

This question belongs to: Static General Knowledge Inventions and Discoveries