MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 36 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In ABCD parameters, A and C are called |
| A. | reverse current ratio and transfer admittance |
| B. | reverse voltage ratio and transfer impedance |
| C. | reverse current ratio and transfer impedance |
| D. | reverse voltage ratio and transfer admittance |
| Answer» E. | |
| 2. |
Match the following list: List - I List – II(a)z11(i)\({\left. {\frac{{{V_2}}}{{{I_2}}}} \right|_{~at~{I_1} = 0}}\)(b)h11(ii)\({\left. {\frac{{{V_1}}}{{{I_1}}}} \right|_{~at~{V_2} = 0}}\)(c)h22(iii)\({\left. {\frac{{{V_1}}}{{{I_1}}}} \right|_{~at~{I_2} = 0}}\)(d)z22(iv)\({\left. {\frac{{{I_2}}}{{{V_2}}}} \right|_{~at~{I_1} = 0}}\) Correct code is: |
| A. | (a) – (iii), (b) – (iv), (c) – (i), (d) – (ii) |
| B. | (a) – (i), (b) – (iii), (c) – (iv), (d) – (ii) |
| C. | (a) – (ii), (b) – (iv), (c) – (iii), (d) – (i) |
| D. | (a) – (iii), (b) – (ii), (c) – (iv), (d) – (i) |
| Answer» E. | |
| 3. |
Find Z11. |
| A. | (1 - j2) Ω |
| B. | (5 + j10) Ω |
| C. | (5 + j15) Ω |
| D. | (3 - j4) Ω |
| Answer» C. (5 + j15) Ω | |
| 4. |
ABCD parameters are used in analysis of ______. |
| A. | Short circuit |
| B. | Electronic circuits |
| C. | Open circuit |
| D. | Transmission line |
| Answer» E. | |
| 5. |
Directions: The following items consist of two statements, one labeled as “Assertion(A)” and the other labeled as “Reason(R)”. You are to examine the two statements carefully and decide if the Assertion(A) and the Reason(R) are individually true and if so whether the reason is a correct explanation of the assertion. Select your answer to these items using the codes given below and mark your answer accordingly.Assertion (A): The Z parameters are open circuit parameters.Reason (R): The Z parameters may be measured at one terminal while the other terminal is open. |
| A. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| B. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| C. | (A) is true, but (R) is false. |
| D. | (A) is false, but (R) is true. |
| Answer» B. Both (A) and (R) are true, but (R) is not the correct explanation of (A). | |
| 6. |
For a two-port network, the condition of Symmetry in terms of z-parameters is |
| A. | z12 = z21 |
| B. | z11 = z22 |
| C. | z11 = z21 |
| D. | z12 = z22 |
| Answer» C. z11 = z21 | |
| 7. |
Match the following Lists:List-IList-II(a) Open circuit parameters(i) \(\left[ {\begin{array}{*{20}{c}} {\frac{{{I_1}}}{{{V_1}}}}&{\frac{{{I_1}}}{{{V_2}}}}\\ {\frac{{{I_2}}}{{{V_1}}}}&{\frac{{{I_2}}}{{{V_2}}}} \end{array}} \right]\)(b) Short circuit parameters(ii) \(\left[ {\begin{array}{*{20}{c}} {\frac{{{V_1}}}{{{I_1}}}}&{\frac{{{V_1}}}{{{V_2}}}}\\ {\frac{{{I_2}}}{{{I_1}}}}&{\frac{{{I_2}}}{{{V_2}}}} \end{array}} \right]\)(c) Hybrid parameters(iii) \(\left[ {\begin{array}{*{20}{c}} {\frac{{{V_1}}}{{{V_2}}}}&{\frac{{{V_1}}}{{ - {I_2}}}}\\ {\frac{{{I_2}}}{{{V_2}}}}&{\frac{{{I_1}}}{{ - {I_2}}}} \end{array}} \right]\)(d) Transmission parameters(iv) \(\left[ {\begin{array}{*{20}{c}} {\frac{{{V_1}}}{{{I_1}}}}&{\frac{{{V_1}}}{{{I_2}}}}\\ {\frac{{{V_2}}}{{{I_1}}}}&{\frac{{{V_2}}}{{{I_2}}}} \end{array}} \right]\) Correct codes are:Code: |
| A. | a-iv, b-i, c-ii, d-iii |
| B. | a-iv, b-ii, c-iii, d-i |
| C. | a-ii, b-iii, c-i, d-iv |
| D. | a-ii, b-iv, c-iii, d-i |
| Answer» B. a-iv, b-ii, c-iii, d-i | |
| 8. |
For any lossless, reciprocal three-port network, one port can be terminated in a reactance so that the other two ports are: |
| A. | Shorted |
| B. | Decoupled |
| C. | Matched |
| D. | Opened |
| Answer» C. Matched | |
| 9. |
Large networks can be divided into sub-networks by means of a/an: |
| A. | Single two-port model |
| B. | Interconnected two-port model |
| C. | Isolated two-port model |
| D. | Maximum 3 two-port model |
| Answer» C. Isolated two-port model | |
| 10. |
For a two-port network A = x1, B = x2, C = 1 / x2. For the network to be reciprocal, D is equal to |
| A. | 1 / x1 |
| B. | 0 |
| C. | 2 / x1 |
| D. | 2 / x2 |
| Answer» D. 2 / x2 | |
| 11. |
For the two-port network shown in the figureV1 = 60 I1 + 20 I2 and V2 = 20 I1 + 40 I2Consider the following for the above network:1. The network is both symmetrical and reciprocal2. The network is reciprocal3. A = D4. y11 = 1/50Which of the above is/are correct? |
| A. | 2 only |
| B. | 2 and 4 |
| C. | 1 only |
| D. | 1 and 3 |
| Answer» C. 1 only | |
| 12. |
For the 2-port network shown, determine the value of transfer impedance Z21. |
| A. | 1 Ω |
| B. | 3 Ω |
| C. | 4 Ω |
| D. | 2 Ω |
| Answer» C. 4 Ω | |
| 13. |
A two-port network is characterized by:I1 = 3V1 + 4V26I2 = 2V1 – 4V2It’s A, B, C and D parameters are, respectively |
| A. | 2, 3, 6 and 9 |
| B. | 2, -3, 10 and -9 |
| C. | 3, 2, -9 and 6 |
| D. | 3, -2, 9 and -6 |
| Answer» C. 3, 2, -9 and 6 | |
| 14. |
NIC is a circuit board or card that is installed in a computer so that it can be connected to a network. What is the full form of NIC? |
| A. | Norton Internet Card |
| B. | Network Integrated Card |
| C. | Norton Infection Card |
| D. | Network Interface Card |
| Answer» E. | |
| 15. |
A network is said to be reciprocal if |
| A. | Z12 = Z21 |
| B. | Y12 = Y21 |
| C. | AD - BC = 1 |
| D. | all of these |
| Answer» E. | |
| 16. |
Match the elements of List I with List IIList I(Y - parameters)List II(Transmission Parameters)a) Y11(i) \(- \frac{{\Delta T}}{B}\) b) Y12(ii) A/Bc) Y21(iii) D/Bd) Y22(iv) -1/B |
| A. | (a) – (ii), (b) – (iv), (c) – (iii), (d) – (i) |
| B. | (a) – (iii), (b) – (i), (c) – (iv), (d) – (ii) |
| C. | (a) – (iv), (b) – (i), (c) – (iii), (d) – (ii) |
| D. | (a) – (i), (b) – (iv), (c) – (iii), (d) – (ii) |
| Answer» C. (a) – (iv), (b) – (i), (c) – (iii), (d) – (ii) | |
| 17. |
Consider the following statements:They are given as necessary conditions for driving point functions with common factors in p(s) and q(s) cancelled:1. The coefficients of the polynomial p(s) and q(s) must be real.2. Poles and zeroes must be conjugate pairs if imaginary or complex.3. The terms of lowest degree in p(s) and q(s) may differ in degree be one at most.Which of the above statements is/are correct? |
| A. | 1, 2 and 3 |
| B. | 1 only |
| C. | 1 and 2 only |
| D. | 2 and 3 only |
| Answer» D. 2 and 3 only | |
| 18. |
For a two-port network, the condition of Reciprocity in terms of h-parameter is |
| A. | h12 = h21 |
| B. | h11 = h22 |
| C. | h12 = - h21 |
| D. | h12 = -h22 |
| Answer» D. h12 = -h22 | |
| 19. |
Consider the following statements for the hybrid parameters:(a) h11 is called input impedance with output shorted.(b) h21 is current gain with output shorted.(c) h12 is the voltage feedback ratio with input terminals shorted.(d) h22 is output admittance with input terminal open.Which of the statements given above are correct? |
| A. | (a), (b) and (c) only |
| B. | (a), (c) and (d) only |
| C. | (a), (b) and (d) only |
| D. | (a), (b), (c) and (d) |
| Answer» D. (a), (b), (c) and (d) | |
| 20. |
Match List 1 with List 2 and select the correct answer using the code given below the lists:List 1(Excitation)List 2(Two-port parameters) A. I1, I2 1. z B. V1, V2 2. y C. V1, I2 3. g D. I1, V2 4. h |
| A. | A- 1, B - 2, C - 3, D - 4 |
| B. | A- 4, B - 2, C - 3, D - 1 |
| C. | A- 1, B - 3, C - 2, D - 4 |
| D. | A- 4, B - 3, C - 2, D - 1 |
| Answer» B. A- 4, B - 2, C - 3, D - 1 | |
| 21. |
Consider the following experimental readings for a two-port network: V1V2I1I2Outputopen100V60 V10 A0Inputopen30 V40 V03 A The values of Z11, Z12, Z21, and Z22 respectively are |
| A. | 10 Ω, 10 Ω, 6 Ω and 13.33 Ω |
| B. | 6 Ω, 10 Ω, 10 Ω and 6 Ω |
| C. | 10 Ω, 6 Ω, 10 Ω and 13.33 Ω |
| D. | 6 Ω, 10 Ω, 6 Ω and 10 Ω |
| Answer» B. 6 Ω, 10 Ω, 10 Ω and 6 Ω | |
| 22. |
Consider the following statements:1. The coefficients in the polynomials p(s) and q(s) must be real and positive.2. Poles and zeroes of z(s) must be conjugate if imaginary or complex.Which of these statements are associated with the driving point function \(Z(s) = \frac{{p(s)}}{{q(s)}}\) ? |
| A. | Both 1 and 2 |
| B. | 1 only |
| C. | 2 only |
| D. | Neither 1 nor 2 |
| Answer» B. 1 only | |
| 23. |
In the circuit shown, 2-port network N has Z11 = 103 Ω, Z12 = 10 Ω, Z21 = - 106 Ω and Z22 = 104 Ω. The current gain \(\dfrac{I_2}{I_1}\) is |
| A. | -50 |
| B. | 50 |
| C. | 20 |
| D. | -20 |
| Answer» C. 20 | |
| 24. |
For the transfer function of a physical two–port network : |
| A. | All the zeros must lie only in the left half of the s – plane |
| B. | The poles may lie anywhere in the s – plane |
| C. | The poles lying on the imaginary axis must be simple |
| D. | All poles and zeroes should be in the left half s plane. |
| Answer» D. All poles and zeroes should be in the left half s plane. | |
| 25. |
A two-port network is reciprocal if _________ |
| A. | Y11 = Y22 |
| B. | Y12 = Y21 |
| C. | Y12 = Y11 |
| D. | Y22 = Y21 |
| Answer» C. Y12 = Y11 | |
| 26. |
In hybrid parameters, h11 and h21 are called as |
| A. | input impedance and forward current gain |
| B. | reverse voltage gain and output admittance |
| C. | input impedance and reverse voltage gain |
| D. | output impedance and forward current gain |
| Answer» B. reverse voltage gain and output admittance | |
| 27. |
A two-port network has scattering parameters given \(\left[ s \right] = \left[ {\begin{array}{*{20}{c}} {{s_{11}}}&{{s_{12}}}\\ {{s_{211}}}&{{s_{22}}} \end{array}} \right]\). If the port 2 of the two-port is short-circuited, the s11 parameter for the resultant one-port network is |
| A. | \(\frac{{{s_{11}} - {s_{11}}{s_{22}} + {s_{12}}{s_{21}}}}{{1 + {s_{22}}}}\) |
| B. | \(\frac{{{s_{11}} + {s_{11}}{s_{22}} - {s_{12}}{s_{21}}}}{{1 + {s_{22}}}}\) |
| C. | \(\frac{{{s_{11}} + {s_{11}}{s_{22}} + {s_{12}}{s_{21}}}}{{1 - {s_{22}}}}\) |
| D. | \(\frac{{{s_{11}} - {s_{11}}{s_{22}} + {s_{12}}{s_{21}}}}{{1 - {s_{22}}}}\) |
| Answer» C. \(\frac{{{s_{11}} + {s_{11}}{s_{22}} + {s_{12}}{s_{21}}}}{{1 - {s_{22}}}}\) | |
| 28. |
Directions: The following items consist of two statements, one labeled as “Assertion(A)” and the other labeled as “Reason(R)”. You are to examine the two statements carefully and decide if the Assertion(A) and the Reason(R) are individually true and if so whether the reason is a correct explanation of the assertion. Select your answer to these items using the codes given below and mark your answer accordingly.Assertion (A): The total gain of a cascaded system is determined by the product of the gains of each stage.Reason (R): The gain of each stage must be determined under loaded conditions. |
| A. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| B. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| C. | (A) is true, but (R) is false |
| D. | (A) is false, but (R) is true. |
| Answer» B. Both (A) and (R) are true, but (R) is not the correct explanation of (A). | |
| 29. |
A 2-port network is represented by the following equations:V1 = 60 I1 + 20 I2V2 = 20 I1 + 40 I2The ABCD parameters of the above network would be |
| A. | \(\left[ {\begin{array}{*{20}{c}}2&{\frac{1}{{20}}}\\3&{100}\end{array}} \right]\) |
| B. | \(\left[ {\begin{array}{*{20}{c}}{100}&3\\2&{\frac{1}{{20}}}\end{array}} \right]\) |
| C. | \(\left[ {\begin{array}{*{20}{c}}{100}&{20}\\6&3\end{array}} \right]\) |
| D. | \(\left[ {\begin{array}{*{20}{c}}3&{100}\\{\frac{1}{{20}}}&2\end{array}} \right]\) |
| Answer» E. | |
| 30. |
For the two port network as shown above, the parameters h11 and h21 are |
| A. | 1 Ω and 2 Ω |
| B. | 2 Ω and 1 |
| C. | 1 and 1 / 2 Ω |
| D. | 1 / 2 Ω and 1 |
| Answer» E. | |
| 31. |
Consider the following standard symbols for two-port parameters:1. h12 and h21 are dimensionless2. h11 and B have dimension of ohms3. BC is dimensionless4. C is dimensionlessWhich of the above are correct? |
| A. | 1, 2 and 3 only |
| B. | 1, 2 and 4 only |
| C. | 3 and 4 only |
| D. | 1, 2, 3 and 4 |
| Answer» B. 1, 2 and 4 only | |
| 32. |
Consider the following measurements on a two-terminal network:1. When a voltage of 100∠0° volts is applied at the input port with output port open, I1 = 20∠0° A and V2 = 25∠0° V.2. When a voltage of 100∠0° volts applied at output port with input port open, I2 = 10∠0° A and V1 = 50∠0° V.The driving point impedances Z11, Z22 and transfer impedances Z21, Z12 respectively are |
| A. | 5 Ω, 10 Ω and 1.25 Ω, 5 Ω |
| B. | 10 Ω, 5 Ω and 1.25 Ω, 5 Ω |
| C. | 5 Ω, 1.25 Ω and 5 Ω, 10 Ω |
| D. | 10 Ω, 1.25 Ω and 5 Ω, 5 Ω |
| Answer» B. 10 Ω, 5 Ω and 1.25 Ω, 5 Ω | |
| 33. |
For the two-port network shown in the given figure, the value of Z11/Z22 is: |
| A. | 1 |
| B. | 4 |
| C. | 2 |
| D. | 3 |
| Answer» B. 4 | |
| 34. |
For the two-port network shown here, find the values of Z11 and Z22. |
| A. | 10 Ω and 60 Ω |
| B. | 15 Ω and 20 Ω |
| C. | 30 Ω and 10 Ω |
| D. | 9 Ω and 24 Ω |
| Answer» E. | |
| 35. |
In the case of two-port networks, which parameters are called transmission parameters? |
| A. | ABCD parameters |
| B. | y-parameters |
| C. | z-parameters |
| D. | h-parameters |
| Answer» B. y-parameters | |
| 36. |
A passive 2-port network is in a steady-state. Compared to its input, the steady state output can never offer ________. |
| A. | higher voltage |
| B. | lower impedance |
| C. | greater power |
| D. | better regulation |
| Answer» D. better regulation | |