ELECTRICAL CIRCUITS
EEE
MALLA REDDY COLLEGE OF ENGINEERING AND TECHNOLOGY
Problem:
Sketch the dotted equivalent circuit for the coupled coils shown in figure and find
the current I?
Solution:
The dotted equivalent circuit is
jX
M
jK X
L
1
X
L
2
j
0.65 5 3
j
2.5
By
applying KVL to the circuit
10I- j8I + (j5 + j3 + 2 x j2.5)I =50
I(10- j8 + j3) =50
I = 4.47 at an angle of 26.56 A
