Consider a circuit shown in figure:
The correct values of Y parameters are
A)
B)
C)
D)
E)
Choose the correct answer from the options given below:

Question

Question

This question was previously asked in

UGC NET Paper 2: Electronic Science Nov 2020 Official Paper

Answer 1

Concept:

Y-parameter: It is also known as short circuit parameter i.e.

The Y-parameter for the two-port network is:

Or I₁ = Y₁₁V₁ + Y₁₂V₂

I₂ = Y₂₁V₁ + Y₂₂V₂

Analysis:

Given circuit is:

Calculation of Y₁₁ and Y₂₂

Let V₂ = 0

Then I = 2V₂ = 0 (open)

I₁ = - I₂

V₁ = 4 I₁

i.e,

So,

Calculation of Y₁₂ and Y₂₂

Let V₁ = 0:

Applying KCL at (a), we get:

I₁ + 2V₂ + I₂ = 0 ----(1)

At (a):

Thus

Short trick: Students can tick the answer just by calculating Y₁₁ and Y₂₁ by elimination method.