Homework # 1 The company takes a following balanced loads from a 440V, 3 phase, 50HZ supply. Load 1: 20KW lighting load Load 2: a con tinuous motor load of 30KVA at 0.5pf lagging Load 3: an intermittent welding load of 30KVA at 0.5pf lagging Find the CKVAR rating of the capacitor bank required to improve the power factor of Load 1 and Load 2 together to 0.95. If the capacitor bank are connected in star, determine the capacitor required in each phase. What is the new over-all power factor after the correction has been applied, the welding machine is switched on.

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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.