Physics, asked by lakshmi5851, 2 months ago

the surge impedance of a telephone line is

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Answered by ItsManavKing

Explanation:

Surge impedance of a transmission line or an underground cable is defined as √(L/C). ... Its value is about 400 ohms for overhead lines and about 40 ohms for underground cables. In power transmission at 50/60 Hz it is used to find the Surge Impedance Loading (SIL).

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