Vay chgn dap an C.. Chi CO dong dien xoay chieu ba pha mdi tao diic/c tCf tn/c/ng quay.. Dong dien xoay chieu ba pha la he thong gom ba dong dien 2n xoay chieu mot pha, lech pha nhau g
Trang 1G i a i Tai trung diem dao dong eua h a i nguon truyen tori ngi/gfc pha nhau
nen bietn dp dao dong tong hgfp bSng 0
Vay chgn dap an C
chieu ba pha?
A K h i cifcfng do dong dien trong mot pha bkng khong t h i cifdng do
dong dien trong hai pha con l a i khac khong
B Chi CO dong dien xoay chieu ba pha mdi tao diic/c tCf tn/c/ng quay
C K h i ciidng do dong dien trong mot pha ctfc dai t h i ci/cfng do
dong dien trong hai pha con l a i ctfc tieu
D Dong dien xoay chieu ba pha la he thong gom ba dong dien
2n
xoay chieu mot pha, lech pha nhau goc —
G i a i Dong dien xoay chieu ba pha la he thong gom ba dong dien xoay
chieu mot pha, lech pha nhau goc
Vay chon dap an D
mot diem t h i chum t i a td\u k i n h do c6 diTdng keo dai:
A giao nhau cf sau thau k i n h va giao diem each thau k i n h mot
khoang nho hon do Idrn tieu C L T cua thau k i n h
B giao nhau d sau thau k i n h va giao diem each thau k i n h mot
khoang Idfn hon do Idfn tieu CLT cua thau k i n h
C giao nhau of sau thau k i n h va giao diem t r u n g vdri tieu diem vat
cua thau k i n h
D song song vdfi true chinh cua thau k i n h
G i a i Neu chum t i a sang 16 k h o i thau k i n h phan k y ma hoi tu t a i mot
diem t h i chum t i a t 6 i thau k i n h d6 c6 dudng keo dai giao nhau 6 sau
thau k i n h va giao diem each thau k i n h mot khoang nho hOn do 16n
tieu C U T ciia thau k i n h
Vay chgn dap an A ,
Giai Chi tietde thi TS D H , C D Mon Vat li ' 19