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Inventions MCQs – Certification Test 707

Light Bulb MCQ (Question 707) – Learning App & e-Book Download

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MCQ 707: Light Bulb was discovered by an American inventor named as:

  1. Sir Walter Brattain
  2. Sir William Shockley
  3. Sir Thomas Edison
  4. Sir John Stevens
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8th Class Science Test Questions

8th Class Science Quiz with Answers