Electrical networks

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Image text transcribed for accessibility: Question 1 A telephone line has the following parameters: R = 40 ohm /m, G = 400 mu S/m, L = 0.2 mu H/m, C = 0.5 nF/m. If the line operates at 1 MHz, calculate the characteristic impedance Z0 and velocity u. After how many meters will the voltage drop by 30 dB in the line?

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