A single-conductor belted cable of 5 km long has a conductor diameter of 2 cm and an inside diameter of lead sheath of 5 cm. The cable is used at 24.9 kV line-to-neutral voltage and 60 Hz frequency. Calculate the following: a. Maximum and minimum values of electric stress. b. Optimum value of conductor radius that results in smallest (minimum) value of maximum stress.

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Fiber Optics

Fiber optics is a technology used to transmit the facts such as light or pulses with fiber or plastic over long distances. Visual fibers are about the width of a human hair strand and, when tied directly to a fiber-optic cable, can transmit multiple long-distance records and faster in different ways.