user-avatar
ngocminhct2008
2 năm trước
Bài 8 : Hai dây dẫn đặt song song với nhau, I1 = 6A, I2 = 4A, cách nhau 50cm, ngược chiều nhau. Hãy xác định những điểm mà tại đó từ trường bằng 0.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Part II. Supply the correct form of the words in brackets (5 pts): 1. In electronics they learn to repair ……appliances. HOUSE 2. The most popular …….. at recess is talking . ACT 3. Hoa is having a...............check-up MEDICINE 4. You must be careful when playing video games because they can be ………. ADDICT 5. Edison’s most famous........................was thethe electronic bulb. INVENT Part III. Identify the mistake in each sentence by circling A, B, C or D.(5 pts) 1. It takes Huy three hours doing his homework every evening. A B C DA 2. Viet not got up early and do morning exercises yesterday. A B C D 3 . Hoa prefers reading books to play video games. A B C D 4. After each lesson we often have a ten-minutes rest. A B C D 5. My sister likes playing badminton but she doesn't play it very good. A B C D

1. He caused an accident because he was driving too ………………….….. A. fastly B. fast C. very fast D. much fast 2. Living in the city is …………………..than in the countryside. A. more noisy B. noisier C. noisyer D. less noisy 3. You should pay more …………….in class. A. part B. care C. notice D. attention 4. I bought this dress at the...................on Hang Bai street. A. clothes’ store B. store of closes C. clothes store D. closing store 5. Isn’t it easy to learn English well ? - _______________________________ A. No, it is B. No it does not C. Yes, it is D. Yes. It does 6. The news on TV last night ____________ very good. A. was B. has C. were D. be 7. My sister doesn’t want to drink coffee and …………. A. I do either B. I do , too C. So do I D. Neither do I 8. You had better ………. fast or you’ll miss the bus. A. to run B. run C. running D. ran 9. Now Hoa is used ____________the busy roads in the city. A. to cross B. crossing C. for crossing D. to crossing 10. He looks different _________his father. A. at B. with C. on D. from 11. A: “ Thank you so much for your help”- B:...................................... A. No problem B. It’s my pleasure C.Don’t mention it D. Best wishes 12. …………….. a big elephant! A. Which B. What an C. What D. How 13. If he eats all that food, he eats……………………… A. quite much B. too many C. quite many D. too much 14. My homework ...................... about 2 hours a day. A. takes B. has C. makes D. gives 15. How heavy are you? A-How much weight do you have? B-How many kilos are you heavy? C-How much do you weigh? D- What is the heaviness? 16. I don’t want much sugar in my coffee. Just____________ , please. A. a few B. a little C. fewer D. less 17. “I have an idea. Let’s go for a swim on Sunday afternoon”. - “________” A. OK, what time? B. You’re kidding C. I know D. I’m sure 18. Do you go out ………..? A. in the afternoon on Fridays B. on Fridays in the afternoon C. on afternoons Friday D. on Friday afternoons 19. She has more ........................... than me. A. a day B. a day off C. day offs D. days off 20. Please ...the milk carefully. I don’t want it to boil over. A. see B. watch C. look at D. notice

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