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Q18. A star connected unbalanced three phase load is connected to a four-wire supply with a phase voltage of 240 V a.c. The resistive loads in each of the three phases are as follows:

Red to neutral 40 Ω; yellow to neutral 50 Ω; blue to neutral 60 Ω. Determine EACH of the following:

(a) The current in each phase;

(b) The current in the neutral wire;

(c) The phase angle between the neutral current and the voltage VRN.