Cho hai bản kim loại phẳng đặt song song tích điện trái dấu, một êlectron bay vào điện trường giữa hai bản kim loại nói trên, với vận tốc ban đầu v₀ vuông góc với các đường sức điện. Bỏ qua tác dụng của trọng trường. Quỹ đạo của êlectron là

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Một số câu hỏi khác có thể bạn quan tâm.

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

  The General Certificate of Secondary Education (GCSE) is the name of a set of English qualifications, generally

  taking by secondary school students at the age of 15-16 in England.

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

  When GCSEs are taken in secondary school, they can often combined with other qualifications, or diplomas.

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

  If you decide to take any examination system, you should make contact with the Admissions Office to ask for an appropriate preparation for the subject whom you are planning to study.

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

  If you have already decided on a course that you would like to study at university, or we recommend that you take a look at the course requirements first.

• Choose the word that has the underlined part pronounced differently from the rest:

  requirements             subject              secondary              levels

• Choose the word that has the underlined part pronounced differently from the rest:

  specialize                variety                particular                 wide

• Choose the word that has the underlined part pronounced differently from the rest:

  equivalent              technique               question              quite

• Choose the word that has the underlined part pronounced differently from the rest:

  compound               course                around                  hour

• Choose the word that has the underlined part pronounced differently from the rest:

  apply               carefully                 entry                 discovery

• Choose one sentence that has the closest meaning to the root one:

  I did not come to your party due to the rain.