Physics, 26.11.2021 15:40 Serenitybella
Một mạch kín gồm 1 nguồn (12V-2 ), mạch ngoài là bóng đèn D(6V-12W) nối tiếp với điện trở R0, đèn sáng bình thường, tính R0.
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Một mạch kín gồm 1 nguồn (12V-2 ), mạch ngoài là bóng đèn D(6V-12W) nối tiếp với điện trở R0, đèn sá...
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