MAGNETIC PERMEABILITY AND MAGNETIC SUSCEPTIBILITY
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PHYSICS – পদার্থবিদ্যা
PHYSICS – পদার্থবিদ্যা
INTENSITY OF MAGNETISING FIELD
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MAGNETISING FIELD / MAGNETISATION VECTOR
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General Science Questions Answers
সাধারণ বিজ্ঞান ১০০১টি প্রশ্ন উত্তর Source: Internet