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thinhpro1262
2 năm trước
Một vòng dây phẳng giới hạn diện tích S=10cmvuông đặt trong từ trường đều cảm ứng từ B=0,1T.vectơ pháp tuyến của vòng dây làm thành với vectơ B một góc anpha =30°.Tính từ thông qua S
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