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Find current through 30Ω using theveninis theorem
1 Answer
written 3.9 years ago by |
Step I: Calculation of VTh
Removing the 30 Ω resistor from the network.
Mesh 1 and Mesh 2 from a supermesh.
Writing current equation for supermesh.
I1−I2=13 ..........................(1)
Writing voltage equation for supermesh
150−15I1−60I2−40I2=015I1+100I2=150 .....................(2)
Solving equations (1) and (2)
I1=−10 A, I2=3A
Writing VTh equation
40I2−VTh−50=0VTh=40I2−50VTh=40(3)−50=70 V
Step II:*Calculation of RTh*:
Replacing the voltage sources by short circuits and the current source by an open circuit,
RTh=75 || 40=26.09 Ω
Step III: Calculation of IL:
IL=7026.09+30=1.25 A