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Trở Về Chính Mình
2 năm trước

cho doan mach 30 om tren bong den ghi 12v -6w hdt la 30v : a) tinh dien tro tuong duong

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Nguyễn Trường An
2 năm trước

Đáp án:

 54 ôm

Giải thích các bước giải:

 điện trở bóng đèn: Rd=U^2/P =(12^2)/6=24 ôm

Rtd= Rd+Rm= 24+30 =54 ôm

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