11. A single-phase line operating at 60 Hz consists of two 4/0 12-strand copper conductors with 5 ft spacing between conductor centers. The line length is 20 miles. The line voltage is 20 kV. The following data are obtained from the tables for this conductor: • Diameter of Individual Strands = 0.1328 inches • Outside diameter 0.552 inches Geometric Mean Radius (G.M.R. at 60 Hz) = 0.01750 feet. Determine the total inductance in H. Note: 1 foot = 12 inches; and 1 mile = 1609 m. £0 = 8.85 x 10-12 F/m %3D

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Latches and Flip Flop

Just like logic gates, the latches and flip-flops are the important elements of an electronic circuit. The logic gates form the important part of combinatorial circuits, while the latches and flip-flops form the essential part of a sequential circuit. Sequential circuits form the important concept of automata theory in electronics and electrical engineering, these circuits are a kind of logic circuit whose output depends on both present input and past inputs, that is, the input history.