English, 27.10.2021 16:30 annie2u559
Người ta dùng dây Nikêlin có điện trở suất 0,4.10-6 Ωm và có tiết diện 0,02 mm2 để quấn một biến trở có giá trị 40 Ω. Chiều dài của cuộn dây quấn biến trở này là bao nhiêu?
Answers: 3
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Người ta dùng dây Nikêlin có điện trở suất 0,4.10-6 Ωm và có tiết diện 0,02 mm2 để quấn một biến trở...
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