Inventions MCQs (Grade 8) From Textbook

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Inventions Study Guide: Certification Test 76

Loudspeaker Quiz App & e-Book: MCQ 76

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MCQ: 76

A loudspeaker was discovered by

  1. Sir Gideon Sundback
  2. Sir Arthur Sicard
  3. Sir Neil Harphan
  4. Sir Alexander Graham Bell
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Loudspeaker Study Guide: Inventions App & eBook Quiz

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8th Class Science Test Questions

8th Class Science Quiz with Answers