Q. What Elmer A. Sperry invented?

  • (A) Hydraulic turbine
  • (B) Gyrocompass
  • (C) Hydroplane
  • (D) Magnetic compass
✅ Correct Answer: (B) Gyrocompass

Published by Ram Sharma ⭐ 193.88K Points at 13-Jan-2022 08:37 am in Physics

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