Đáp án:
Ta có:
$L=4\pi.10^{-7}.\dfrac{N^2.S}{l}$
$⇒$ Hệ số tự cảm tỉ lệ thuận với số vòng dây dẫn và tiết diện, tỉ lệ nghịch với chiều dài dây dẫn.
$Ф=L.i$
$⇒$ Hệ số tự cảm tỉ lệ thuận với từ thông và cường độ dòng điện trong ống dây.
BẠN THAM KHẢO.
Cần bao nhieu gam SO3 cho vao dd H2SO4 10% để được 100g dd H2SO4 20%
Vẽ con lợn :Đ
Qua cuộc chiến tranh nam bắc triều và trịnh nguyễn em có đánh giá gì về hậu quả củacuoocj đấu tranh nam bắc triều và trịnh nguyễn
.Choose the word whoose undelined part is different from the others. 1.A. citadelB. dayC. vacationD. stay2.A. nearB. ideaC. theaterD. beach3.A. watchB. wantC. cameraD. what4.A.theaterB.thisC.thereD.thatPART B. VOCABULARY, GRAMMAR AND STRUCTUREII.Find one choice in A, B, Cor Dthat best complete the sentences: 1. My sister .................. home for school yet.A. didn’t leave B. hasn’t leftC. don’t leaveD.isn’t leaving2. Amsterdam is one of the .................. cities in the world.A. peacefulest B. peacefuler C. most peacefulD.more peaceful3. .................. the film is late, I will wait to watch it.A. Because B. WhenC. ButD. Although4. My father first .................. Da Lat in 2010.A. visited B. visitC. goD. been5. Which one is different?A. boxing B. cyclingC. tellingD. skiiing6. .....................go to the movie? –Good idea.A.What aboutB. How about C. Why don’t weD. Why do you7. London is....................... than Ho Chi Minh city.A.bigB. bigerC. biggest D. bigger8. She ..................... aerobics now.A.is doingB. doingC. doD.doesPART C. WRITING III.Put the verb in bracket in the correct tense1.They (study) .....................English since last year.2.It usually (rain)..................... in the summer.3.They (build) ........................the buildings at the moment.4.He (never eat) .....................Mexican food before.IV. Use the conjunction at the end of each group to connect the sentences.1.We turned to The Movie Channel. We wanted to watch Pinocchio. (because) =>................................................................................................. 2.You can watch The Pig Race. You can watch Who’s Faster. (or) => .................................................................................................. 3.I love films. I don’t like watching them on television. (but)=>.................................................................................................PARTD. READINGV.Read the text about Pelé and answer the questions.Edson Arantes do Nascimento, better known as Pelé, is widely regarded as the best football player of all time. Pelé was born on October 21st, 1940 in the countryside of Brazil . Pelé’s father was a professional football player and taught Pelé how to play at a very young age.Pelé began his career atthe age of 15 when he started playing for Santos Football Club. In 1958, at the age of 17, Pelé won his first World Cup. It was the first time the World Cup was shown on TV. People around the world watched Pelé play and cheered.Pelé won three World Cup and score 1,281 goals in his 22-year career. In 1999, he was voted Football Player of the Century. Pelé is a national hero in Brazil. During his career he becamewell-known around the world as ‘The King of Football’. 1.When was Pelé born? .......................................................... 2.Why do people call him ‘The King of Football’? .......................................................... 3.When did he become Football Player of the Century? .......................................................... 4.How many goals did he score in total? ........................................................... 5.Is he regarded as the best football player ofall time? ...........................................................
Nguyên nhân nào làm cho vùng Đông Bắc Bộ có kinh tế phát triển năng động ?
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Giúp mình với ạ, câu nào cũng đc, đầy đủ càng tốt
Vẽ anime hoặc chibi :Đ
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Trình bày thái độ của triều đình Huế khi Pháp xâm lược nước ta. Mong mn người giúp đỡ. Cảm ơn rất nhiều
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