The chemical element Oxygen was independently discovered by Carl Wilhelm Scheele and which other English scientist? MCQ with Answer and Explanation
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Question #1
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The first practical solar cell capable of converting significant sunlight into electricity was invented by whom at Bell Labs?
Correct Answer: Option B
Explanation:
In 1954, Pearson, Fuller, and Chapin developed the silicon photovoltaic cell, achieving around 6% energy efficiency.
In 1954, Pearson, Fuller, and Chapin developed the silicon photovoltaic cell, achieving around 6% energy efficiency.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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Who invented the first mass-produced synthetic plastic material, Bakelite, in 1907?
Correct Answer: Option A
Explanation:
Belgian-American chemist Leo Baekeland invented Bakelite, the first fully synthetic plastic valued for its electrical non-conductivity.
Belgian-American chemist Leo Baekeland invented Bakelite, the first fully synthetic plastic valued for its electrical non-conductivity.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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Who is the inventor of the Richter Scale used to measure the magnitude of earthquakes?
Correct Answer: Option B
Explanation:
Charles F. Richter developed the Richter magnitude scale in 1935 in partnership with Beno Gutenberg.
Charles F. Richter developed the Richter magnitude scale in 1935 in partnership with Beno Gutenberg.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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