De thi tuyen sinh lop 10 vat ly chuyen

DAI HOC TAN TAO
TRVONG THPT NANG ICEHEU
BE CHINH mtrc

KI THI TUYEN SINN LOP 10 NAM HOC 2015-2016
MON THI: VAT Li (CHUYEN)
Ngay thi: 05/6/2015
TWA gian lam bai: 150 phut

Cau 1: (1,0 diem) M6t nguoi, di xe may dr A den B r6i trey ve A. Khi di tir A den B, tren /lira
quang dating dau di voi van toe khong doi 40 km/h; trn /lira quang duOng con lai di vai van t6c
kh8ng d6i 60 km/h. Khi den B, nguei ay lap tirc quay ye A (136 qua thOi gian quay dau xe). Trong
nira theyi gian di tir B ye A, ngtroi do di voi van toe khong doi 50 km/h; trong nira thai gian con lai
di voi van Vic khong doi 30 km/h. Tinh van toe trung binh cua ngtrefi do trong ca qua trinh chuyen
d6ng.
Cau 2: (1,5 diem) Co ba binh each nhiet dung ntroc, khi lacing nubs va nhiet d6 ban dau cua
moi binh Ian loot la: mi, t1; m2, t2 va m3, t3. Ta d6 nu6c 6 binh thir nhk va binh th* hai vao binh
thir ba thi nhiet d6 cua mac khi có can bang nhiet la 45°C. Biet m1 = 2m2 = 4m3, t1 = 2t2 = 4t3.
Tinh nhiet d6 t1, t2 va t3 (bey qua su mat mat nhiet do moi trung xung quanh hap thu).
Cau 3: (1,0 dam) DUng mot mat phang nghieng co chieu dai 10 m de dua mot vat có khi luting
200 kg len cao 4 m bang mot lac kdo 1000 N.
a) Tinh hieu suat eta mat phang nghieng.
b) Tinh lure can tac dung len vat trong trueng hop do.
Cau 4: (2,0 dam) II& MN la true chinh cua than kinh, AB là vat sang, A'B' la anh dm AB qua
than kinh.
a) Bang each ye duong truyen cua cac
tia sang, xac dinh quang tam va cac tieu
diem dm thau kinh.
b) Cho AB = 1 cm, A'B' = 3 cm,
AA' 7 16 cm. Xac dinh khoang each dr vat M
A

N
AB den than kinh va tieu cu cua thau kinh?
Cau 5: (1,5 diem) M6t ding suat dien 50 kW duce truyen dr may phat dien xoay chieu co hieu
dien the on dinh 1 kV den not tieu thu bang day tai có dien tr& tong cong la 5 S2. Khi mac true
tiep day tai vao hai cac dm may phat dien thi hieu dien the & nth tieu thy bang bao nhieu? Tinh
cong suat hao phi trill day tai va hieu suat tai dien khi do.
Cau 6: (2,0 diem) Cho mach dien nhu hinh
R
C
ye. Cac ampe ke A1, A2, A3, A4 co ding
dien trey Ra. Biet ampe ke Al chi 1,5 A, M
ampe ke A2 chi 2 A.
a) Tim so chi dm cac ampe ke A3, A4
va eating d6 dong dien qua dien trey R.
b) Biet R =1,5 S2, tinh dien trey Ra cua
cac ampe ke va hieu dien the U.
can 7: (1,0 dam) 1-la'y neu phucmg an xac dinh khi luting rieng cua drily ngan? Cho cac dung cu
gOm:
- Lo thiiy tinh rOng .41:1 kin. Nu& co kh6i luting rieng D.
- Thity ngan dung de xac dinh khoi luting rieng.
- Can d6ng ho c45 dO chinh xac cao, CO giai han do va do chia nho nhat phii hop.
--- Het --Ho va ten thi sinh•

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