विद्युत चुम्बक किससे तैया� – McqOptions

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1.	विद्युत चुम्बक किससे तैयार होता है -
A.	नरम लोहा
B.	इस्पात लोहा
C.	कोबाल्ट
D.	पीतल
Answer» B. इस्पात लोहा

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