एक रैखिक द्वि-पोर्ट नेटवर्क (two-port network) पारस्परिक (reciprocal) होता है यदि और केवल यदि:

In a two-port network, what condition is applied to determine the Z-parameter Z11?

In a symmetrical T-network, the series arms each have an impedance of 10 Ω and the shunt arm has an impedance of 20 Ω. Find the Z-parameters (Z11, Z12, Z21, Z22 respectively) for this network.