9. Three 50-ohm resistors are connected in star across 400 V, 3-phase supply. If one o the resistors is disconnected, then the line current will be a. 8 A b. 13.85 A c. 4 A d. 0 A 400-V, 3-phase, 4-wire service mains supplies a star connected load. The resistance of each line is 0.1 ohms and 10. that of the neutral 0.2 ohm. The load impedances are z; = (6 + 19) ohms 1 Z: = 8 ohms ; Za = )6 - 18) ohms. Calculate the current in the neutral. a. 56.22 A b. 50.06 A c. 45.18 A d. 49.35 A

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Nodal Analysis

In the analysis of any electric circuit, nodal analysis is the method of determining the potential difference or voltage between different nodes in an electric circuit. A node is a point where two or more branches connect each other. In the nodal analysis, the voltages are determined in the terms of branch currents. The nodal analysis is also known as the node voltage method or branch current method. The nodal analysis method is one of the several applications of Kirchhoff's Current Law (KCL).