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Saturday, July 13, 2019
विद्युत चुम्बक बनाने के लिए प्रायः किस पदार्थ के छड़ का उपयोग होता है ?
(A) इस्पात
(B) पीतल
(C) नरम लोहे
(D) इनमें से कोई नहीं
Ans- C
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