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2 năm trước
1. Hai điện trở 10Ω và 20Ω được mắc song song với nhau vào hai điểm có hiệu điện thế 15V. Cường độ dòng điện trong mạch chính là...........A 2. Cho hai điện trở R1 = 15Ω, R2 = 30Ω . Biết R1 chỉ chịu được cường độ dòng điện tối đa là 2A, R2 chịu được cường độ dòng điện lớn nhất là 1,5A. Hỏi có thể mắc nối tiếp hai điện trở trên vào hai điểm có hiệu điện thế tối đa là .......V
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