Word Count : 261

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दी गई समस्या में हमें ऐलुमिनियम धातु के इलेक्ट्रॉनों के संख्या घनत्व ( n = 9.64 \times 10^{28} , \text{m}^{-3} ) और तार का व्यास ( 2.0 , \text{mm} ) दिया गया है। इसमें ( I = 4 , \text{A} ) धारा प्रवाहित हो रही है। इलेक्ट्रॉनों की ड्रिफ्ट वेग ( v_d ______ _________ ____ __________ ________ _________ _______ ________.
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