- B Figure Q1 B Shows A Circuit Of Power Source For An Electrical And Electronics Lab In Smk Taman Melur The Lab Has B 1 (110.49 KiB) Viewed 139 times
b) Figure Q1 (b) shows a circuit of power source for an electrical and electronics lab in SMK Taman Melur. The lab has been equipped with a circuit breaker that will interrupt the circuit if the operating current is more than 154. Three loads as detailed in Table Q1 (b) will be connected in parallel at terminal a-b of the circuit. j52 M 432 a + M 492 -j3Ω- Z1 240 20° v Z3 Z2 ---- Figure Q1 (b) Table Q1 (b) Load 1 Z;=492 Load 2 Z2=30+j1032 Load 3 Z3=5+j222 i) Evaluate whether all the loads can be connected safely in the lab or not. If not, suggest the combination of any 2 loads that can be installed in the lab without initiate the circuit breaker. Justify your suggestion by showing the new total load current if your chosen loads combination are connected to the circuit. (Hint: Apply Thevenin theorem to simplify the circuit of power source.) (13 marks) ii) Based on the results obtained in (i), evaluate the correlation between load current and voltage with the total load impedance. Justify your answer. (4 marks)