Physics, 25.10.2021 01:20 105001038

Trên một bóng đèn có ghi 220V-55W và trên bàn là có ghi 220V-1100W được mắc vào hiệu điện thế 110V. A. Tính điện trở của bàn là và của bóng đèn khi nó hoạt động bình thường?

B. Bóng đèn và bàn là được sử dụng như trên, trung bình 5 giờ trong 1 ngày. Tính điện năng mà bóng đèn và bàn là tiêu thụ trong 30 ngày theo đơn vị jun và số đếm tương ứng của công tơ điện.

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Trên một bóng đèn có ghi 220V-55W và trên bàn là có ghi 220V-1100W được mắc vào hiệu điện thế 110V....

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