Một dòng điện đặt trong từ trường vuông góc với đường sức từ, chiều của lực từ tác dụng vào dòng điện sẽ không thay đổi khi

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  There are several ___________ to attract the attention of other people.
  
  

• Choose the best answer for the following sentence:

  Please _________ your hand if you need assistance.
  
  

• Choose the best answer for the following sentence:

  Some of my classmates wanted to know _________ .

• Choose the best answer for the following sentence:

  ______________, but we didn't believe him.
  
  

• Choose the best answer for the following sentence:

  _____________ if he had known how unhappy she was.
  
  

• Choose the best answer for the following sentence:

  ____________ I was working as well as studying.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  Elisa said to her friend that she was going to the countryside next week.

• Find a mistake in the four underlined parts of the sentence and correct it:

  He asked me if they understood what I had said to them.

• Choose one sentence that has the same meaning as the root one:

  “Why don’t you invite Mary to your birthday party, Jane?” said Tom.
  
  

• Choose one sentence that has the same meaning as the root one:

  “Don’t forget to give me a ring at 10 o’clock tonight,” said Trung.