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clow2953
2 năm trước
Cho mạch điện có sơ đồ như hình vẽ, trongđó R1 = 40Ω, R2 = 10Ω, ampe kế A chỉ 2A. Sử dụng số liệu đã cho trả lời các câu 18,19: a. Điện trở tương đương của mạch là…………Ω b. Số chỉ của các ampe kế A1 và A2 lần lượt là…….A;……..A
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