Q. When was vacuum tube invented?

  • (A) 1900
  • (B) 1906
  • (C) 1910
  • (D) 1880
✅ Correct Answer: (B) 1906

Published by Pradeep Sikarwar ⭐ 9.01K Points at 05-Mar-2022 12:20 pm in Computer

You must be Logged in to update hint/solution

📝 Notes by Other Students/ Teachers

📊 Question Analytics

👁️
440
Total Visits
📽️
5 y ago
Published
🎖️
Pradeep Sikarwar
Publisher
📈
89%
Success Rate