quocduy300600 quocduy300600
  • 25-12-2022
  • Physics
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Một bóng đèn có công suất 25W được mắc nối tiếp vào hiệu điện thế 220V. Biết đèn sáng bình thường. Tính điện trở của bóng đèn và điện năng mà bóng tiêu thụ trong 1 tháng (30ngày), mỗi ngày dùng trung bình 6 giờ.

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