Một mạch dao động LC có cuộn thuần cảm có độ tự cảm L = 400 mH và tụ điện có điện dung C = 40 μF. Hiệu điện thế cực đại giữa hai bản tụ là 50V. Cường độ hiệu dụng của dòng điện qua mạch bằng:        

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Một số câu hỏi khác có thể bạn quan tâm.

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

  His wife said it was quite unusual for him to read in bed
  
  

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

  "I'll tell you about this tomorrow, Mary, " said Tom.
  
  

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

  council                    couch                        couple                      counter

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

  cow                  flower                  town                  know

• Choose a word that has different stress pattern:

  interesting                       direction                       knowledge                    narrow

• Choose a word that has different stress pattern:

  event                          current                       until                          convenient

• Choose the best answer for the following sentence:

  You will become ill __________ you don't stop working so hard.
  
  

• Choose the best answer for the following sentence:

  The brothers are so alike I cannot ____________ one from the other.
   

• Choose the best answer for the following sentence:

  Driving a car with faulty breaks is _________ quite a risk.
   

• Choose the best answer for the following sentence:

  She did the work _________ her own.