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huanhan07072003
2 năm trước
Câu1 trên bóng biết đèn ghi 12v- 6w đèn này được sử dụng đúng với hiệu điện thế định mức. Hãy tính: A điện trở của đèn khi đó B điện năng mà đèn sử dụng trong 1h
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