Physics, 09.11.2021 20:40 dylancasebere

Cho cho 2 đèn led giống nhau có ghi 2,5 V-0.05W mắc vào nguồn điện là pin dự phòng có thông số như sau (5V-7500mA. h)( trong đó mA. h là dung lượng của pin tính bằng I. t) Đèn sáng bình thường a) Vẽ sơ đồ mạch điện và tính Rtđ của toàn mạch

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Cho cho 2 đèn led giống nhau có ghi 2,5 V-0.05W mắc vào nguồn điện là pin dự phòng có thông số như s...