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1. |
Characteristics impedance of a coaxial line with external and inner diameter 5mm is: |
A. | 40 Ω |
B. | 41.58 Ω |
C. | 47.78 Ω |
D. | 54.87 Ω |
Answer» C. 47.78 ‚âà√≠¬¨¬© | |