two port network

What is the transfer impedance of the two-port network shown in Fig. 1?

• 1 $\Omega$

• 2 $\Omega$

• 3 $\Omega$

A two-port network is simply a network inside a black box, and the network has only

• two terminals

• two pairs of accessible terminals

• two pars of ports

A two-port network is defined by the relations  $I_1=2V_1+V_2$  ,  $I_2=2V_1+3V_2$  . Then  $Z_{12}$  is

• -2 $\Omega$

• -1 $\Omega$

• $-\frac{1}{2}\Omega$

• $-\frac{1}{4}\Omega$

For the single element two-port network in Fig, z₁₁ is

• 0

• 5

• 10

• 20

For the single element two-port network in Fig, z₁₁ is

• undefined

• 5

• 10

• 20

When port 1 of a two-port circuit is short-circuited,

I₁ = 4I₂ and V₂ = 0.25I₂. Which of the following

is true?

• y₁₁=4

• y₁₂=16

• y₂₁=16

• y₂₂=0.25

If z-parameters are z₁₁ = 40, z₂₂ = 50 and z₁₂ = z₂₁ = 20, what would be the value of y₂₂ in the matrix form of y-parameters given below?

• $\frac{4}{160}$

• $\frac{5}{160}$

• $\frac{10}{160}$

• $\frac{15}{160}$

How is the short circuit reverse transfer admittance (y₁₂) calculated in terms of current and voltage ratio?

• V₂/ I₁ (keeping I₂ = 0)

• I₂/ V₁ (keeping V₂ = 0)

• I₁/ V₂ (keeping V₁ = 0)

• V₁/ I₂ (keeping I₁ = 0)

Find [Y]?

• 
• 
• 
• 

Find V₁ and V₂

• -68.6 V, 114.3 V

• 68.6 V, -114.3 V

• 114.3 V, -68.6 V

• -114.3 V, 68.6 V