विद्युत चुम्बक बनाने के लिये सामान्यतः किस धातु का प्रयोग किया जाता है ? - Which metal is commonly used to make electromagnets? - Vidyut Chumbak Banane Ke Liye Samanyat Kis Dhatu Ka Prayog Kiya Jata Hai ? General Science in hindi, Physics Loha question answers in hindi pdf Nickle questions in hindi, Know About tamba General Science online test General Science notes in hindi quiz book Cobalt
Answer is 2
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