Physics · History of Physics
तापायनिक वाल्व (डायोड) का आविष्कार किसने किया था?
- 1जे० ए० फ्लेमिंग✓
- 2ली डी फॉरेस्ट
- 3थॉमस एडिसन
- 4जॉन लोगी बेयर्ड
सही उत्तर देखें
जे० ए० फ्लेमिंग
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