Question

Đoạn mạch chứa một cuộn cảm thuần L; đặt vào hai đầu đoạn mạch điện áp tức thời u = U₀cos ωt (V) thì cường độ hiệu dụng trong mạch là bao nhiêu ?
A. \(\dfrac{U_0}{L\omega}\)

B. \(\dfrac{U_0}{\sqrt 2L\omega}\)

C. \(U_0L\omega\)

D. \(\dfrac{U_0}{\sqrt 2}L\omega\)

Answer 1

U0Lω" id="MathJax-Element-1-Frame" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-table; float:none; font-size:22.5px; font-style:normal; font-weight:normal; letter-spacing:normal; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; text-align:left; text-indent:0px; text-transform:none; white-space:nowrap; word-spacing:normal; word-wrap:normal" tabindex="0">U0Lω

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C. $U_{0}L\omega$

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Answer 2

Đáp án: B

Answer 3

Đáp án đúng : D

Answer 4

Đáp án đúng : B