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43.I’ll be needing Switches.Which of the following combinations of switches should beclosed so that the least current passes through the power supply?A.S1andS2B.S1andS3C.S2andS3D.S1,S2, andS3Solution:Least current corresponds to the largest value of equivalent resistance.S1andS2closed:Req= 11.87 ΩS1andS3closed:Req= 14.83 ΩS2andS3closed:Req= 13 ΩS1,S2, andS3closed:Req= 11.85 ΩFor the next two items, consider the circuit shown.44.Junk Schon.Which of the following equations result from a correct application of Kirch-hoff’s junction rule?A – 23
Sample ExamSecond Semester, AY 2016–2017Physics 7245.Looper.Which of the following equations result from a correct application of Kirchhoff’sloop rule for the right inner loop?A – 24