Who invented the first mass-market portable music device, the Walkman, introduced by Sony in 1979? MCQ with Answer and Explanation

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Who invented the first mass-market portable music device, the Walkman, introduced by Sony in 1979?

A. Masaru Ibuka

B. Nobutoshi Kihara

C. Steve Jobs

D. Akio Morita

Answer: Option B

Solution (By JKSSB Mock Tests)

Audio engineer Nobutoshi Kihara designed the Walkman under the direction of Sony co-founder Akio Morita.

This question belongs to: Static General Knowledge Inventions and Discoveries

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The first practical automatic dishwasher was invented and patented by which female innovator in 1886?

A. Josephine Cochrane

B. Mary Anderson

C. Grace Hopper

D. Stephanie Kwolek

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Correct Answer: Option A

Explanation:
Josephine Cochrane designed the first successful hand-powered mechanical dishwasher because she wanted to protect her fine china from chipping.

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Question #2

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Who discovered that certain types of chemical reactions produce electricity spontaneously, formalizing electrochemical cells?

A. Michael Faraday

B. Luigi Galvani and Alessandro Volta

C. Georg Ohm

D. Humphry Davy

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Correct Answer: Option B

Explanation:
Galvani observed muscle contractions from static discharges, and Volta channeled this into the continuous current metallic pile.

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Question #3

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Who discovered the principles of vaccination, microbial fermentation, and pasteurization?

A. Robert Koch

B. Louis Pasteur

C. Antonie van Leeuwenhoek

D. Edward Jenner

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Correct Answer: Option B

Explanation:
Louis Pasteur's extensive contributions include vaccines for rabies and anthrax, pasteurization, and germ theory breakthroughs.

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