user-avatar
legiang1997
2 năm trước
Một khung dây có tiết diện hình tròn bán kính khung dây là 20 cm khung dây đặt vuông góc với đường sức từ của một từ trường đều có B=2×10^-5T. Hãy xác định giá trị của từ thông xuyên qua khung dây nói trên
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Ex1: Choose the best answer A, B or C 1. Please _______ the fee at the table over there. A. pay B. you pay C. paying 2. It _________ in winter in our country. A. rarely snowing B. rarely snows C. rarely snow 3.– Where are Nam and Minh? – They are ________ ping-pong in the gym. A. play B. doing C. playing 4. Playing football does not need _________. A. much equipment B. many equipments C. much equipments 5. The athletes trained very hard _________. A. today B. every day C. daily Ex2: Read the following passage and choose the best answer A, B, or C Roger Federer is probably the best and most famous tennis player in the world today. He was born on August 8th, 1981 in Basle, Switzerland. His parents encouraged him to start playing tennis when he was eight years old. He won his first Wimbledon title, the Wimbledon Junior, when he was sixteen. Over the next few years, he played all over the world. In Australia he played for his country in the 2000 Olympic Games. Then in 2003 he began to show how good he was. He started the year by winning two tournaments in a row, in Dubai and Marseilles. He also won his first Grand Slam title at the Wimbledon Championships. In 2004 he won three out of four Grand Slam titles. When he is not playing tennis, Federer is busy with his special project, the Roger Federer Foundation, which helps

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team