NPTEL Basic Electrical Circuits Week 7 Assignment Answers 2024

1. Find the z parameters from the following circuit. What will be the value of 𝑍₁₁ + 𝑍₁₂

2𝑘 Ω
5𝑘 Ω
1𝑘 Ω
5𝑘 Ω

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2. From the below given matrices, one is the Z-matrix and other is the Y-matrix of the same two port network. Now identify the matrices as Z or Y.

A is Y-matrix, B is Z-matrix
A is Z-matrix, B is Y-matrix
A and B cannot be Y, Z matrices of any 2-port network
Cannot be determined

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3. From the below circuit, find the value of ℎ ₁₁ 𝑎𝑛𝑑 ℎ₂₂

5𝑘 Ω and 0. 1𝑚 Ω⁻¹
15𝑘 Ω and 1𝑚 Ω⁻¹
10𝑘 Ω and 5𝑚 Ω⁻¹
1𝑘 Ω and 0. 2𝑚 Ω⁻¹

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4. Find the sum of all the Y-parameters of the circuit shown below –

2.5 S
2.5 Ω
1.5 S
2 Ω

Answer :-

5. The Z-parameter matrix of the following circuit is given below. Find the power delivered to the 50Ω resistor

9.45 W
8.45 W
10.45 W
8 W

Answer :-

6. In the circuit given below, find the n for which the network will be reciprocal

-0.01
0.01
-0.05
-0.02

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7. For the below given circuit,find out the h parameters.Calculate the value of h₁₁+h₁₂+h₂₁+h₂₂ given R_A = R_B = R_C = 1Ω.

Answer :-

8. Find the sum of all the elements in the Y matrix of the following two port networks. Then determine the current in the 4Ω load that is connected to the output port when a 2A source is applied at the input port.

2.33 S ,-0.18 A
5.24 S,-0.35 A
3.63 S,0.18 A
1.32 S , 0.35 A

Answer :-

9. Find the thevenin equivalent (thevenin voltage and thevenin resistance) of the below circuit with respect to port 2 (considering ZL as the load resistance ) given the z parameters of the below given circuit.

V_th = 1.67 V, R_th = 7.33Ω
V_th = 2.33 V, R_th = 10.45Ω
V_th = 5.12 V, R_th = 4.33Ω
V_th = 1.67 V, R_th = 8.35Ω

Answer :-

10. Find the sum of all the z-parameters.

0 Ω
8 Ω
4 Ω
2 Ω

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11. The network of the following figure contains both a dependent current source and a dependent voltage source. Determine sum of all the y and z parameters (Don’t worry about the units of y and z parameters)-

-1/3
1/3
0
1

Answer :-

12. Two passive two port networks are connected in cascade as shown in Figure. A voltage source is connected at port 1.
Given:

A₁ ,B₁ ,C₁ ,D₁ ,A₂ ,B₂ ,C₂and D₂ are generalized circuit constants. If the Thevenin equivalent circuit at port 3 consists of a voltage source V_T and Z_T connected in series. Then calculate (V_T / Z_T) in terms of voltage source V₁ and generalized circuit constants.(Note: Z_T should only be in terms of generalized circuit constants any other terms should not be there and in V_T voltage V₁ will occur along with the circuit constants.) –