A
anhcoc02


cho mach dien gom R nt L
Uab=150can2
Uan=70
Unb=150
a,cm cuon day L co dien tro
b,tinh he so cong suat
c,biet cong suat tieu thu cua mach la P=150w, tim R ,r,L
mach dien la diem N nam giua A VA B
Uab=150can2
Uan=70
Unb=150
a,cm cuon day L co dien tro
b,tinh he so cong suat
c,biet cong suat tieu thu cua mach la P=150w, tim R ,r,L
mach dien la diem N nam giua A VA B