
Complex Number for Electric Circuit
Authored by อาทิตย์ ยาวุฑฒิ
Mathematics
University
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
ถ้า L = 5 mH และความถี่เชิงมุม ω = 5,000 rad/s ค่ารีแอคแตนซ์เหนี่ยวนำ XL เท่ากับข้อใด ?
5 Ω
10 Ω
25 Ω
50 Ω
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
ค่าอิมพีแดนซ์เชิงซ้อนของวงจร RL เมื่อ R=5 Ω และ XL = 25 Ω คือข้อใด ?
5 + j5 Ω
5 + j25 Ω
25 + j5 Ω
5 − j25 Ω
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
ขนาดของอิมพีแดนซ์ Z = 5 + j25 เท่ากับข้อใด ?
20 Ω
24 Ω
25.5 Ω
26.5 Ω
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
มุมเฟสของอิมพีแดนซ์ Z = 5 + j25 มีค่าประมาณเท่าใด ?
45°
60°
75°
78.7°
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
แรงดัน v(t)=150sin(5,000t) เมื่อแปลงเป็นเฟสเซอร์จะได้ข้อใด ?
150∠0∘
150∠90∘
150∠−90∘
150∠180∘
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
ค่าความต้านทาน R ในวงจรคือเท่าใด ?
2 Ω
5 Ω
10 Ω
25 Ω
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
ความสัมพันธ์ของ XL กับ ω และ L คือข้อใด ?
XL = ω + L
XL = ω/L
XL = ωL
XL = L/ω
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