Ans: Equivalent resistance referred to primary r1, =r1+ (N1/N2)2 r2
Equivalent reactance referred to primary x1, =X1 + (N1/N2 )2 x2
Equivalent resistance referred to secondary r2, = r2 + (N2/N1 )2 r1
Equivalent reactance referred to secondary X2, = x2+(N2/N1 )2 x1
Where, r1 and r2 are the primary and secondary resistances respectively. And x1 and x2 are the primary and secondary reactances respectively. N1 and N2 are the primary and secondary turns respectively.