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Toranya
2 năm trước
Tại sao khi cho hđt xoay chiều vào cuộn sơ cấp thì trong thứ cấp lại xuất hiện dòng điện xoay chiều? Ai giúp mình câu này với!!!
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Các câu hỏi liên quan

V. Write the correct tense or form of the verbs in brackets. 1. I ________________ (already/ read) that book. It’s fantastic. 2. We ________________ (not do) any volunteer work five years ago. 3. James ________________ (do) lots of volunteer work when he was in high school. 4. I think people ________________ (eat) more healthy food in the future. 5. People ________________ (need) about 2,000 calories a day to stay in shape. 6. ______________ (Alex/ ever/ be) to Seattle? ~ Yes, he ______________ (be) to Seattle once. 7. Right now, Margaret ________________ (have) a shower. Do you want to ring later? 8. Be a Buddy ________________ (establish) in 2011. 9. We encouraged people ________________ (recycle) bottles, cans and paper. 10. My mother enjoys ________________(do) charitable work. VI. Supply the correct form of the words in brackets. 1. Mike’s hobby is listening to music. He gets a lot ___________ from listening to music. (enjoy) 2. John is a stamp ___________. He has a lot of rare and valuable stamps. (collect) 3. One third of children in the U. S. is ___________ or obese. (weigh) 4. I have ___________ so I must go to a dentist. (tooth) 5. Junk food is ___________, so we shouldn’t eat too much junk food. (health) 6. Blood ___________ give blood for use in hospitals. (donate) 7. They aren’t forced to do charity work. They do it ___________. (volunteer) 8. They opened a shelter to provide housing for the ___________. (home)

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