Question: A given length of a cable, the capacitance of which is 10F/km with a resistance of insulation of 100M/km, is charged to a voltage of

A given length of a cable, the capacitance of which is 10μF/km with a resistance of insulation of 100MΩ/km, is charged to a voltage of 100 V. How long does it take the voltage to drop to 50 V?

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