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For a 2-port network to be reciprocal,

For a 2-port network to be reciprocal,


(a) z11 = z22
(b) y21 = y12
(c) h21 = -h12
(d) AD – BC = 0

Aans. (b) y21 = y12 & (c) h21 = -h12 

For a 2-port network to be reciprocal,