user-avatar
kentanh3011
2 năm trước
Hai bóng đèn có HĐT lần lượt là 6V và 3V,khi đèn sáng bình thường có điện trở tương ứng là 5 ôm và 3 ôm.Cần mắc 2 đèn này với 1 biến trở vào HĐT 9V để 2 đèn sáng bình thường.Vẽ sơ đồ mạch điện và tính điện trở của biến trở khi đó
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

IV, Read the following passage and choose the correct answer ONC NOISY NEIGHBORS Do you sometimes have problems with your neighbor such as noise or littering? Well, the people of Pilton Somerset, England have such problems every summer. For three or four days every year, the village is full of people of all ages who come here for the annual Glastonbury pop music festival. They usually stay in tents, caravans and motorhomes. They leave drink cans and papers all over the street. The music plays until the early hours of the morning, and you can hear people talking and singing all night. The quiet country village becomes a nightmare to live an and some villagers are even thinking of moving to another village. A villager said that last year, "I don't want stop the Glastonbury Festival. I just want the fans to enjoy the festival without disturbing normal village ife". 1. What happen in Pilton, Somerset every summer? A. The neighbors are noisy. B. There are many villagers C. There is a pop music festival D. the villagers litter the street. 2. Visitors litter the street with- A. tents B. caravans C. motorhomes D. cans and papers 3. How long is the pop music festival every year? A. one night B. The whole summer C. Three or four days D. The whole year 4. What is Pilton like during the rest of the year? A. A noisy place B. A quiet village C. A nightmare D. A music concert 5. The villagers just want to A. have a normal life as usual B. stop the fans enjoy the festival C. move far away D. put an end to the festival V Read the text then answer the following questions. (1.0 point) ish New Year is one of the four important traditional (1) st people go to parties. At twelve o'clock (2) festivals until from rarely last will If dress at in the United States. On New Year's night, "Happy New Year!" and a long time. one their friends and relatives good luck. New Year's parties usually (4) morning. ple don't go home (5) nother holiday, Halloween, is mainly for children. On this holiday children (6) er characters. Most of the children go (7) ple at the house do not give them candy, the children (9) as witches, ghe house to house and say "Trick or Treat". (8) play a trick on them. But th happens. Most people give them candy or fruit.

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