Đoạn mạch RLC mắc nối tiếp gồm điện trở R, cuộn cảm thuần cảm kháng ZL, tụ điện dung kháng Z C. Tổng trở của mạch là Z. Hệ số công suất của đoạn mạch là

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Một số câu hỏi khác có thể bạn quan tâm.

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

  knight                         key                         kick                       goal-keeper

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

  government                             against                       globe                        Germany

• Choose the correct sentence which is built from the words and phrases given:

  I / write / give you directions / my house / I also enclose a map
  
  

• Choose the correct sentence which is built from the words and phrases given:

  you / come out of / bus stop, turn right / keep walking / go over a bridge.
  
  

• Choose a word that has different stress pattern:

  football                     between                       captain                     friendly

• Choose a word that has different stress pattern:

  volunteer                    participate                     Vietnamese                  introduce

• Choose the correct sentence which is built from the words and phrases given:

  My house / next to / post office / you / not miss it.
  
  

• Choose a word that has different stress pattern:

  involve                  honour                     final                     nation

• Choose a word that has different stress pattern:

  event                     compete                     series                  attract

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

  It won't rain tomorrow.