user-avatar
EmmaLe
2 năm trước
hai dòng điện có cường độ I1 = 6A và I2 = 9A chạy trong hai dây dẫn thẳng, dài song song cách nhau 10 cm trong chân không, I1 ngược chiều I2. cảm ứng từ do hệ 2 dòng điện gây ra tại điểm M cách đều mỗi dòng là 5cm có độ lớn là bao nhiêu?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

I. Find the word which has a diferrent sound in the underlined part. ( 2pts ) 1. A Clear 2. A. Waited 3. A. borrow 4* A. Electric II. Choose the correct answer. (4pts ) 1. Nha Trang is ......... beach inVietnam. D. fear D. ended D. Cold D. Fantastic ( find the different stress) B. learn B. Erased B. close C. hear C. needed B. Computer C. Work C. Fascinate A. The more beautiful B. more beautiful C. the most beautiful D. most beautiful. 2. This is the first time we ........Eiffel Tower in Paris. A. visit B. has visited C. have visited 3. A person who hosts an event is a ..................... A. actor B. MC C. comedian 4. My father ........Kualar Lumpur three times . A. visit B. will visit C. visited 5. I ........to SamSon beach for our last summer vacation . A. go B. went C. are going 6. .........sports do you like to watch on TV? A. What B. How C. Do 7. I usually play football When I have ...... A. spare time B. good time C. no time 8. My sister often ..........badminton in her free time . A. played B. plays C. playing D. visited . D. reporter D. has visited D. have gone D. How often D. times D. to play. III. Rewrite the sentences with the meaning stays the same.(3.pts ) 1. My brother plays football very well → My brother is .................................................... 2. David likes playing badminton most . → Badminton is .................................................... 3. It started raining an hour ago . → It has .............................................................. 4. The dress is cheaper than the skirt. ( expensive ) → The skirt ........................................................ 5. What a beautiful home you have . → You have ............................ 6. She is short, but she still plays basketball. ( Although) → Although........................................................ IV.Write the past simple form of these verbs .( 1pt) 1. Swim 2. Watch 3. Have 4. See .................. ................. .................. ...................

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