Đáp án: `U_{AB}=-2000V`
Tóm tắt:
`q=-2.10^{-6}C`
`A=4.10^{-3}J`
---------------------
`U_{AB}=?`
Giải:
Hiệu điện thế `U_{AB}` là:
`A=qU_{AB}`
→ `U_{AB}=\frac{A}{q}=\frac{4.10^{-3}}{-2.10^{-6}}=-2000 \ (V)`
VIẾT LẠI CÁC CÂU SAU ĐÂY DÙNG “TOO HOẶC ENOUGH ….. TO V” 9. She couldn’t see the film because it was very boring 11. All students had to stay at home because it rained heavily. 12. You can’t catch any taxi to the airport because it is very early. 13. The truck can go through the gate because it is very wide. 14. Tom was very brave boy, so all his friends admired him. 16. It was very cold. They couldn’t keep working in the field. 18. The fair was very noisy. We couldn’t hear each other. 21. The question was very hard. We couldn’t answer it 22. The TV programmer is very exciting. The children won’t miss it 23. You’re very young. You can’t drive that car 24. She was tired. She didn’t go anywhere 25. These shoes are very small. I can’t wear them 26. He is so weak. He can't run. 27. The coffee was very hot. I could drink it. 28. He has a lot of money. He can buy a car. 29. He is very intelligent. He can do it. 30. Tom is strong. He can lift the box. 31. The weather is fine. Mary and her little brother can go to school. 32. The sun is not warm. We can't live on it. 33. The water is quite warm. I can drink it. 34. The weather is so bad that we can’t go out. 35. The film was so boring that we couldn’t go on seeing it. 36. He was so old that he couldn’t run fast. 37. He spoke so fast that we couldn’t understand him. 38. The fair was so noisy that we couldn’t hear each other. 39. You speak so fast that I can’t catch up with your words. 40. It is so early that we can’t go out. 41. The water is so hot that I can’t drink it. 42. The restaurant is so expensive that we can’t eat in that restaurant. 43. He studied so badly that he couldn’t pass the exam. 44. The price of the house is very high. We can't buy it. 45. The story was very funny. We couldn't stop laughing. 46. The film was very boring. We left before the end. ++giúp mik++
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