CHẾ TẠO BỘ THÍ NGHIỆM KHẢO SÁT SUẤT ĐIỆN ĐỘNG CẢM ỨNG TRONG CUỘN DÂY ĐẶT TRONG TỪ TRƯỜNG CỦA NAM CHÂM=MANUFACTURE A DEVICE TO SURVEY E.M.F IN A COIL PLACED IN THE MAGNETIC FIELD OF A MAGNET

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Tác giả: Văn Thành Đào, Vũ Trường Dương, Thị Nhạn Lưu, Thị Hoa Ngô, Hùng Minh Nguyễn, Văn Hùng Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2024

Mô tả vật lý: tr.173 - 180

Bộ sưu tập: Metadata

ID: 480377

Thêm vào giỏ

Electromagnetic induction is an important part of Physics knowledge taught at most technology and engineering universities in Vietnam, including Hanoi University of Industry. The survey shows that the number of experiments on the phenomenon of electromagnetic induction taught at universities in Viet Nam is almost non-existent or very small. Therefore, with the desire to research and create a device of experiments on electromagnetic induction, the authors conducted theoretical research combined with experimental research to create device of experiments to survey electromotive force induction in a coil placed in the magnetic field of a magnet. The results of investigating the dependence of the induced electromotive force on the parameters: rotation speed of the magnet, number of turns in wire coil, cross-section of the coil show that: the amplitude Uout depends linearly on the rotation speed of the magnet (coil with size d=42.44 mm, N=200 turns)
the more turns of wire coil, the larger Uout (coils with diameter d=51.9 mm and different numbers of turns 50, 100, 200, 300) However, with the dependence of Uout on the cross-sectional area of the coil, when increasing the cross-sectional area Uout also increases, but increasing to 2114.48 mm2, Uout tends to decrease. Especially when increasing to 4837.37 mm2, the decrease speed of Uout is shown very clearly.Hiện tượng cảm ứng điện từ là phần kiến thức Vật lý quan trọng được giảng dạy trong hầu hết các trường Đại học công nghệ và kỹ thuật ở Việt Nam, trong đó có Trường Đại học Công nghiệp Hà Nội. Qua khảo sát cho thấy, số lượng bài thí nghiệm về hiện tượng cảm ứng điện từ được giảng dạy tại các trường Đại học trong nước hầu như không có hoặc rất ít. Do đó với mong muốn nghiên cứu xây dựng được bộ thí nghiệm về hiện tượng cảm ứng điện từ, nhóm tác giả đã tiến hành nghiên cứu lý thuyết kết hợp nghiên cứu thực nghiệm để chế tạo được bộ thí nghiệm khảo sát suất điện động cảm ứng trong cuộn dây đặt trong từ trường của nam châm. Kết quả khảo sát sự phụ thuộc của suất điện động cảm ứng cho thấy: biên độ của Ura phụ thuộc tuyến tính vào tốc độ quay của nam châm (với cuộn dây có kích thước d=42,44 mm, N=200 vòng)
số vòng dây càng nhiều thì Ura càng lớn (với các cuộn dây có đường kính d=51,9 mm và số vòng khác nhau 50, 100, 200, 300). Tuy nhiên với sự phụ thuộc của Ura vào tiết diện của cuộn dây thì, khi tăng tiết diện Ura cũng tăng, nhưng tăng tới 2114,48 mm2 thì Ura có xu hướng giảm. Đặc biệt khi tăng tới 4837,37 mm2 tốc độ giảm của Ura được hiển thị rất rõ.

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