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Chemistry, 24.07.2021 05:50 VamLS6316

Một cuộn dây đồng dài 200m có điện trở 16 ôm a) chia cuộn dây đó làm ba cuộn nhỏ có độ dài lần lượt là 50,60,90m. tính điện trở của mỗi cuộn đó

b) muốn có một dây điện điện trở 20 ôm làm từ dây dẫn trên thì dây phải có độ dài là bao nhiêu

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Một cuộn dây đồng dài 200m có điện trở 16 ôm a) chia cuộn dây đó làm ba cuộn nhỏ có độ dài lần lượt...
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