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ngocnguyen12052003
2 năm trước
Sử dụng Ămpe kế xoay chiều để đo cường độ dòng điện chạy trong quạt điện ở lớp học thấy Ămpe kế chỉ giá trị 1.0A. Nếu đổi chỗ 2 đầu phích cắm vào 2 đầu dây của quạt thì kim Ămpe kế chỉ giá trị: A. Số 0 B. Số - 1.0A. C. Số 1.0A D. Không xác định mà dao động.
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