Question

Calculate the short circuit current is the 5 ohm resistor is the load resistance.

(a) 0.72A

(b) 0.32A

(c) 0.83A

(d) 0.67A

I had been asked this question in an online quiz.

I'd like to ask this question from Norton’s Theorem in portion Network Theorems of Basic Electrical Engineering

Answer 1

The correct answer is (a) 0.72A

The best I can explain: Since the 5 ohm is the load resistance, we short it and find the resistance through the short.

If we apply source transformation between the 6 ohm resistor and the 1A source, we get a 6V source in series with a 6 ohm resistor. Now we have two meshes. Let us consider I1 flowing in the first mesh and I2 flowing in the second mesh.

The mesh equations are:

9I1-6I2=4

-6I1+16I2=6

On solving these equations simultaneously, we get I2=0.72A, which is the short circuit current.