Bai 3 Thuc hanh Xac dinh dien tro cua mot day dan bang ampe ke va von ke

<span class='text_page_counter'>(1)</span>TRƯỜNG THCS YÊN LẠC TỔ KHOA HỌC TỰ NHIÊN Hä tªn:…………..........…… Líp: 9......... KIỂM TRA THỰC HÀNH MÔN : VẬT LÍ 9 (Thời gian 45 phút, không kể thời gian giao đề). B¸o c¸o thùc hµnh: XÁC ĐỊNH ĐIỆN TRỞ CỦA MỘT DÂY DẪN BẰNG ĂM PE KẾ VÀ VÔN KẾ 1. Tr¶ lêi c©u hái: a. Viết công thức tính điện trở:. Điểm. ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................. b. Muốn đo Hiệu điện thế giữa hai đầu dây dẫn cần dùng dụng cụ gì? Mắc dụng cụ đó như thế nào với dây dẫn cần đo? ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................. c. Muốn đo Cường độ dòng điện chạy qua một dây dẫn cần dùng dụng cụ gì? Mắc dụng cụ đó như thế nào với dây dẫn cần đo? ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................. 2. KÕt qu¶ ®o LÇn ®o. Hiệu điện thế. Cường độ dòng điện. Điện trở.

<span class='text_page_counter'>(2)</span> (V). (A). (Ώ). 1 2 3 4 5 a. Tính trị số điện trở của dây dẫn đang xét trong mỗi lần đo b. Tính giá trị trung bình cộng của điện trở: ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................. c. Nhận xét về nguyên nhân gây ra sự khác nhau ( nếu có) của các trị số điện trở vừa tính được trong mỗi lần đo. ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................ .................................................................................................................................................................................................................................................

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