GATE EE 2015 Set 1 — Question 56
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Electric Circuits → Two-Port Networks → Z, Y, h & ABCD Parameters
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Question
In a linear two-port network, when is applied to Port 1, a current of flows through Port 2 when it is short-circuited. When is applied to Port 1, a current of flows through a resistance connected across Port 2. When is applied to Port 1, the current (in Ampere) through a resistance connected across Port 2 is ______.
Correct answer
0.4 to 0.6
Solution
Let the Thévenin equivalent of the linear two-port network seen from Port 2 be and . Since the network is linear, is proportional to the input voltage , i.e., .
1.Case 1: , Port 2 is short-circuited (), .
2.Case 2: , , .
Substituting :Then .3.Case 3: , .
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