Tìm kiếm
Chánh Nguyễn
2 năm trước

Đèn 1: 6V-6W nối tiếp với Đèn 2 : 6V-9W , hiệu điện thế AB=12V a) Nhận xét độ sáng mỗi đèn ? b) So sánh độ sáng 2 đèn.

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thyhoangminh
2 năm trước

Đáp án:

Giải thích các bước giải: vì đèn một biết nên l1 = 1A

U1 = U dm = 6 V

R2 = U 2 / p

vì R2 nt R1

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