Một khung dây hình vuông cạnh 5 cm được đặt trong từ trường đều, B = 0,01 T. Đường sức từ vuông góc với mặt khung. Quay khung cho mặt phẳng khung song song với các đừng sức từ. Độ biến thiên từ thông bằng

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose a word that has different stress pattern:

  tropical                           commercial                        primary                         chemical

• Choose a word that has different stress pattern:

  gorilla                             condition                           valuable                          survival

• Choose the best answer for the following sentence:

  If an insurance company refused to pay a claim, and the policy-holder prevailed in a lawsuit, then the insurance company would be ordered to pay what it owed (perhaps plus interest), and nothing more, even if the failure to pay caused additional _____________ to the policyholder.
  
  

• Choose the best answer for the following sentence:

  The fiscal budget, totaling 83,061.3 billion yen, which is designed to boost regional economies and narrow gaps between major cities and the countryside, will be ____________ in time for the start of the new fiscal year in Japan on Tuesday.
   

• Choose the best answer for the following sentence:

  The state policies towards foreign employment facilities make it a suitable destination for large number of workers who come from various parts of the world in the search of _____________.
   

• Choose the best answer for the following sentence:

  This is about the _____________ that people with epilepsy and their families successfully manage each and every day.
   

• Choose the best answer for the following sentence:

  Scientists recognize that species continually disappear at a background _____________ rate estimated at about one species per million per year, with new species replacing the lost in a sustainable fashion.
   

• Choose the best answer for the following sentence:

  "We have been receiving reports of an alarming rate of malnutrition in southern Somali regions, where thousands of children are ______________ death," said Health Minister Isse Weheliye.
   

• Choose the best answer for the following sentence:

  Airbags protect the driver in the event of a severe frontal ____________.
   

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

  digest                              survive                               reunite                                  unnoticed