Who discovered the electron microscope? MCQ with Answer and Explanation

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Who discovered the electron microscope?

A. Max Knoll

B. Ernst Ruska

C. J.J. Thomson

D. Both

Answer: Option D

Solution (By JKSSB Mock Tests)

Ruska and Knoll developed the electron microscope.

This question belongs to: Static General Knowledge First in the World

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Question #1

Which was the first country to issue credit cards?

A. United States

B. Germany

C. Canada

D. United Kingdom

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Correct Answer: Option A

Explanation:
The first modern general-purpose credit card, the Diners Club card, was introduced in the United States in 1950.

This question belongs to: Static General Knowledge First in the World

Question #2

Who won the Nobel Prize in Economics first?

A. Ragnar Frisch and Jan Tinbergen

B. Amartya Sen

C. Milton Friedman

D. Paul Samuelson

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Correct Answer: Option A

Explanation:
Ragnar Frisch and Jan Tinbergen shared the first Nobel in Economics in 1969.

This question belongs to: Static General Knowledge First in the World

Question #3

Who discovered the first potentially habitable exoplanet in a binary system?

A. Kepler team

B. Michel Mayor

C. NASA

D. Both

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Correct Answer: Option A

Explanation:
Circumbinary habitable candidates.

This question belongs to: Static General Knowledge First in the World

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