Đối với đoạn mạch chỉ có cuộn cảm thuần, phát biểu nào sau đây không đúng ?         

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Một số câu hỏi khác có thể bạn quan tâm.

• Cho một lò xo nằm theo phương nằm ngang một đầu cố định, một đầu gắn một vật có khối lượng m khi tác dụng một lực 4N thì lò xo dãn một đoạn là 4cm. Độ cứng của lò xo có giá trị là?

• Trong xã hội nước ta dưới thời Bắc thuộc mâu thuẫn xã hội nào là cơ bản nhất?
  
• Giữa chất và lượng có điểm nào giống nhau?
  

• Ngành công nghiệp mũi nhọn, hằng năm mang lại nguồn tài chính lớn cho Liên Bang Nga là

• Tìm m để đồ thị hàm số có ba cực trị tạo thành tam giác vuông cân?

• The reviewer ________ Mathew's new novel as a new style of modern science fiction.

• Read the passage and choose the correct answer:
  Up to about 1915, movies were short and programs were made up of several works. Then, D W. Griffith and others began to make longer films that provided the same powerful emotional appeal as did melodrama and presented spectacles far beyond what the theater could offer. Consequently, after World War I increasing numbers of spectators deserted the theater for the movies. This trend was accelerated in the late 1920s as a result: of two new elements. In 1927 sound was added to the previously silent film, and thus one of the theater's principal claims to superiority vanished. In 1929 a serious economic depression began. Since audiences could go to the movies for a fraction of what it cost to see a play, theater going became a luxury that few could afford, especially as the depression deepened.
  By the end of World War II, the American theater had been reduced to about thirty theaters in New York City and a small number of touring, companies originating there.
  Question. One thing that movies could do better than the theater was to . . . . . . . . . . . . . . . . . . . . . . . .
  

•  Tăng trưởng kinh tế gắn liền với cơ cấu kinh tế hợp lí, tiến bộ và công bằng xã hội là

• Tìm m để hàm số có điểm cực tiểu là .

• Read the passage and choose the correct answer:
  Up to about 1915, movies were short and programs were made up of several works. Then, D W. Griffith and others began to make longer films that provided the same powerful emotional appeal as did melodrama and presented spectacles far beyond what the theater could offer. Consequently, after World War I increasing numbers of spectators deserted the theater for the movies. This trend was accelerated in the late 1920s as a result: of two new elements. In 1927 sound was added to the previously silent film, and thus one of the theater's principal claims to superiority vanished. In 1929 a serious economic depression began. Since audiences could go to the movies for a fraction of what it cost to see a play, theater going became a luxury that few could afford, especially as the depression deepened.
  By the end of World War II, the American theater had been reduced to about thirty theaters in New York City and a small number of touring, companies originating there.
  Question. Up to the 1920s one objection to film was that. . . . . . . . . . . . . . . . . . . .