## NPTEL Basic Electrical Circuits Week 7 Assignment Answers 2024

1. Find the z parameters from the following circuit. What will be the value of π_{11} + π_{12}

- 2π β¦
- 5π β¦
- 1π β¦
- 5π β¦

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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 β _{11} πππ β_{22}

- 5π β¦ and 0. 1π β¦
^{β1} - 15π β¦ and 1π β¦
^{ β1} - 10π β¦ and 5π β¦
^{ β1} - 1π β¦ and 0. 2π β¦
^{β1}

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

- 2.5 S
- 2.5 Ξ©
- 1.5 S
- 2 Ξ©

Answer :-

5. The Z-parameter matrix of the following circuit is given below. Find the power delivered to the 50Ξ© 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 h_{11}+h_{12}+h_{21}+h_{22} given R_{A} = R_{B} = R_{C} = 1Ξ©.

- 2+k
- 2-k
- k+3
- k-3

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 4Ξ© 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}= 7.33Ξ© - V
_{th}= 2.33 V, R_{th}= 10.45Ξ© - V
_{th}= 5.12 V, R_{th}= 4.33Ξ© - V
_{th}= 1.67 V, R_{th}= 8.35Ξ©

Answer :-

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

- 0 Ξ©
- 8 Ξ©
- 4 Ξ©
- 2 Ξ©

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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 (Donβt 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:

A_{1} ,B_{1} ,C_{1} ,D_{1} ,A_{2} ,B_{2} ,C_{2 }and D_{2} 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 V_{1} 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 V_{1} will occur along with the circuit constants.) –

- V
_{ 1 }/ (A_{1}B_{2}+ B_{1 }D_{2}) - V
_{1}/ (A_{1}A_{2}+ B_{1D 2}) - V
_{1 }/ (A_{1}B_{2}– B_{1D}_{2}) - V
_{1}/ (A_{1}A_{2}– B_{ 1D}_{2})

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