Physics · Electronics
वर्ष 1907 में ट्रायोड वाल्व (ऑडियोन) का निर्माण किसने किया था?
- 1विलियम शॉकले
- 2यूजेन गोल्डस्टीन
- 3जॉन एम्ब्रोस फ्लेमिंग
- 4ली डी फॉरेस्ट✓
सही उत्तर देखें
ली डी फॉरेस्ट
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