Đề kiểm tra học kì II môn Vật lý 7

 UBND HUYEN GO DAU CONG HOA XA HOI CHU NGIA VIET NAM
 PHONG GIAO DUC VA DAO TAO Doc lap-Tu do- Hanh phuc 
 KIEM TRA HOC KI II NAM HOC 2009-2010 
 MON THI: VAT LI 7
THOI GIAN: 45 phut ( Khong ke thoi gian phat de)
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I_Li thuyet:
 Cau 1 : Cuong do dong dien la gi ? Hay cho biet dung cu do va don vi do cuong do dong dien ? ( 2 diem )
 Cau 2 : Dong dien la gi ? Neu cac tac dung chinh cua dong dien ? ( 2 diem )
 Cau 3 : Co may loai dien tich ? Neu su tuong tac giua hai vat nhiem diem diem cung loai, hai vat nhiem dien khac loai (2 diem )
II_Bai tap:
 Cau 1: Doi don vi cho cac gia tri sau day ( 2 diem ) : 
 a) 320 mA = ........... A
 b) 2,08 A = ........... mA
 c) 220 V = ........... kV
 d) 5kV = ........... V
 Cau 2 : Cho mach dien gom co cac bo phan : 1cong tac, nguon dien 2pin mac noi tiep, mot bong den pin, day dan. Hay ve so do mach dien va ve them mui ten chi chieu dong dien khi cong tac dong ( 2 diem )
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