Question

Calculate the mesh currents.

(a) 7A, 6A, 6.22A

(b) 2A, 1A, 0.57A

(c) 3A, 4A, 5.88A

(d) 6A, 7A, 8.99A

The question was asked by my school principal while I was bunking the class.

My question is based upon Mesh Analysis topic in section Network Theorems of Basic Electrical Engineering

Answer 1

Correct answer is (b) 2A, 1A, 0.57A

To explain: The two meshes which contain the 3A source, act as a supper mesh. The mesh equations are:

I1-I3=-3

4I1-14I2+11I3=10

4I1-28I2+10I3=0

Solving these equations simultaneously, we get the three currents as

I1=-1A, I2=0.57A, I3=2A

So currents are 2A, 1A, 0.57A.