MCQOPTIONS
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MCQOPTIONS
This section includes 24 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. |
A two-port network has parameters of ABCD. What happens if all the impedances in the network are doubled? |
| A. | A and D remain unchanged, B is doubled and C is halved |
| B. | A, B, C and D are all doubled |
| C. | A and D are doubled, C and B remain unchanged |
| D. | A and D remain unchanged, C is doubled and B is halved |
| Answer» B. A, B, C and D are all doubled | |
| 2. |
Direction: The following item consists of two statements, one labeled as ‘Statement (I) and the other as ‘Statement (II). You are to examine these two statements carefully and select the answers to these items using the code given below:Statement (I): ABCD parameters are widely used in the analysis of power transmission engineering and termed as circuit parameters.Statement (II): ABCD parameters are called as transmission parameters. |
| A. | Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I) |
| B. | Both Statement (I) and Statement (II) are individually true but Statement (II) is NOT the correct explanation of Statement (I) |
| C. | Statement (I) is true but Statement (II) is false |
| D. | Statement (I) is false but Statement (II) is true |
| Answer» C. Statement (I) is true but Statement (II) is false | |
| 3. |
Match the two lists and choose the correct answer from the code given below:List IList II(a) Input resistance with output short-circuited(i) hf(b) Reverse open circuit voltage amplification(ii) hr(c) Output short-circuited current transfer ratio(iii) ho(d) Output conductance with input open-circuited(iv) hi |
| A. | (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv) |
| B. | (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii) |
| C. | (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i) |
| D. | (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i) |
| Answer» C. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i) | |
| 4. |
For the two-port network shown in the figure, the impedance (Z) matrix (in Ω ) is |
| A. | \(\left[ {\begin{array}{*{20}{c}} 6&{24}\\ {42}&9 \end{array}} \right]\) |
| B. | \(\left[ {\begin{array}{*{20}{c}} {42}&6\\ 6&{60} \end{array}} \right]\) |
| C. | \(\left[ {\begin{array}{*{20}{c}} 9&8\\ 8&{24} \end{array}} \right]\) |
| D. | \(\left[ {\begin{array}{*{20}{c}} 9&6\\ 6&{24} \end{array}} \right]\) |
| Answer» E. | |
| 5. |
Consider a two-port network with the transmission matrix: \({\rm{T}} = \left( {\begin{array}{*{20}{c}} {\rm{A}}&{\rm{B}}\\ {\rm{C}}&{\rm{D}} \end{array}} \right).\) If the network is reciprocal, then |
| A. | \({{\rm{T}}^{ - 1}}{\rm{\;}} = {\rm{\;T}}\) |
| B. | \({{\rm{T}}^2}{\rm{\;}} = {\rm{\;T}}\) |
| C. | Determinant (T) = 0 |
| D. | Determinant (T) = 1 |
| Answer» E. | |
| 6. |
for a 2 – port Symmetrical bilateral network, if transmission parameters \(\rm {A = 3 \ and \ B = 1Ω}\). Then the value of parameter \(\rm {C}\) is |
| A. | 3 |
| B. | 8 |
| C. | 6 |
| D. | 9 |
| Answer» C. 6 | |
| 7. |
Find the characteristic impedance for the network shown in the figure. |
| A. | 38.73 Ω |
| B. | 42.5 Ω |
| C. | 16 Ω |
| D. | 25 Ω |
| Answer» B. 42.5 Ω | |
| 8. |
A Two-Port Network is said to be symmetrical when the following equalities hold good |
| A. | Z11 = Z22 and Z12 = Z21 |
| B. | Z11 = Z22 |
| C. | Y12 = Y21 |
| D. | Y11 = Y22 and Y12 = Y21 |
| Answer» C. Y12 = Y21 | |
| 9. |
Consider the two-port network shown in the figure.The admittance parameters, in siemens, are |
| A. | y11 = 2, y12 = -4, y21 = -1, y22 = 2 |
| B. | y11 = 1, y12 = -2, y21 = -1, y22 = 3 |
| C. | y11 = 2, y12 = -4, y21 = -4, y22 = 2 |
| D. | y11 = 2, y12 = -4, y21 = -4, y22 = 3 |
| Answer» B. y11 = 1, y12 = -2, y21 = -1, y22 = 3 | |
| 10. |
For the given two-port network, the parameters h11 and h21 are |
| A. | 1 Ω and 2 Ω |
| B. | 2 Ω and 1 |
| C. | 1 Ω and -1/2 |
| D. | None of the above |
| Answer» E. | |
| 11. |
For the two-port network shown, the parameter Y12 is equal to |
| A. | YC |
| B. | YC + YB |
| C. | YA + YC |
| D. | -YC |
| Answer» E. | |
| 12. |
Consider the building block called ‘Network N’ shown in the figure. Let C = 100 μF and R = 10 kΩ.Two such blocks are connected in cascade, as shown in the figure:The transfer function \(\rm \frac{{{V_3}\left( s \right)}}{{{V_1}\left( s \right)}}\) of the cascaded network is |
| A. | \(\rm \frac{s}{{s + 1}}\) |
| B. | \(\rm \frac{{{s^2}}}{{{s^2} + 3s + 1}}\) |
| C. | \(\rm {\left( {\frac{s}{{s + 1}}} \right)^2}\) |
| D. | \(\rm \frac{s}{{s + 2}}\) |
| Answer» D. \(\rm \frac{s}{{s + 2}}\) | |
| 13. |
For a two-port network, V1 and V2 are given byV1 = 60I1 + 20I2V2 = 20I1 + 40I2The Y-parameters of the network are |
| A. | Y11 = 20 × 10-3 Y12 = -10 × 10-3 Y21 = -10 × 10-3 Y22 = 30 × 10-3 |
| B. | Y11 = -10 × 10-3Y12 = 20 × 10-3Y21 = 20 × 10-3Y22 = -30 × 10-3 |
| C. | Y11 = 10 × 10-3Y12 = -20 × 10-3Y21 = -20 × 10-3Y22 = 30 × 10-3 |
| D. | Y11 = -20 × 10-3Y12 = 10 × 10-3Y21 = 10 × 10-3Y22 = -30 × 10-3 |
| Answer» B. Y11 = -10 × 10-3Y12 = 20 × 10-3Y21 = 20 × 10-3Y22 = -30 × 10-3 | |
| 14. |
For the network shown in the figure, Y11 and Y12 are, respectively |
| A. | \(\dfrac{3}{50} \ \text{mho and} \ -\dfrac{1}{30} \ \text{mho}\) |
| B. | \(\dfrac{3}{50} \ \text{mho and} \ \dfrac{1}{30} \ \text{mho}\) |
| C. | \(-\dfrac{3}{50} \ \text{mho and} \ -\dfrac{1}{30} \ \text{mho}\) |
| D. | \(-\dfrac{3}{50} \ \text{mho and} \ \dfrac{1}{30} \ \text{mho}\) |
| Answer» B. \(\dfrac{3}{50} \ \text{mho and} \ \dfrac{1}{30} \ \text{mho}\) | |
| 15. |
For a symmetric lattice network the value of the series impedance is 3Ω and that of the diagonal impedance is 5 Ω, then the Z-parameters of the network are |
| A. | Z11 = Z22 = 2Ω and Z12 = Z21 = ½ Ω |
| B. | Z11 = Z22 = 4Ω and Z12 = Z21 = 1 Ω |
| C. | Z11 = Z22 = 8 Ω and Z12 = Z21 = 2 Ω |
| D. | Z11 = Z22 = 16 Ω and Z12 = Z21 = 4 Ω |
| Answer» C. Z11 = Z22 = 8 Ω and Z12 = Z21 = 2 Ω | |
| 16. |
For the two-port network shown in the figure, the transmission parameter C is: |
| A. | Za |
| B. | \(1 + \frac{{{Z_a}}}{{{Z_b}}}\) |
| C. | Zb |
| D. | 1/Zb |
| Answer» E. | |
| 17. |
For a two-port network, the h parameters, h11 and h21 are obtained |
| A. | by shorting output terminals |
| B. | by opening input terminals |
| C. | by shorting input terminals |
| D. | by opening output terminals |
| Answer» B. by opening input terminals | |
| 18. |
A two-port network has parameters ABCD. If all the impedances in the network are doubled, then |
| A. | A and D remain unchanged, B is doubled and C is halved |
| B. | A, B, C and D are all doubled |
| C. | A and D are doubled, C and B remain unchanged |
| D. | A and D remain unchanged, C is doubled and B is halved |
| Answer» B. A, B, C and D are all doubled | |
| 19. |
Match List - I with List - IIList-I (h parameter)List-II(T parameter)A. h111. \(\dfrac{\Delta T}{D}\)B. h122. \(-\dfrac{1}{D}\)C. h213. \(\dfrac{B}{D}\)D. h224. \(\dfrac{C}{D}\)Choose the correct answer from the options given below: |
| A. | A - 4, B - 2, C - 1, D - 3 |
| B. | A - 2, B - 1, C - 4, D - 3 |
| C. | A - 2, B - 3, C - 1, D - 4 |
| D. | A - 3, B - 1, C - 2, D - 4 |
| Answer» E. | |
| 20. |
In the 2-port network shown in the figure the value of Y12 is |
| A. | \(-\dfrac{1}{3} \ \text{mho}\) |
| B. | \(+\dfrac{1}{3} \ \text{mho}\) |
| C. | -3 mho |
| D. | +3 mho |
| Answer» B. \(+\dfrac{1}{3} \ \text{mho}\) | |
| 21. |
A two-port network satisfies the following relations:4 I1 + 8 I2 = 2 V18 I1 + 16 I2 = V21. The network is reciprocal.2. Z11 = 4 and Z12 = 83. Z21 = 8 and Z22 = 164. Z11 = 2 and Z12 = 4Which of these relations is correct? |
| A. | 1, 2, 3 and 4 |
| B. | 2 and 3 only |
| C. | 3 and 4 only |
| D. | 1 and 2 only |
| Answer» D. 1 and 2 only | |
| 22. |
A 2-port Network is shown in the figure. The parameter h21 for this network can be given by |
| A. | -1/2 |
| B. | +1/2 |
| C. | -3/2 |
| D. | +3/2 |
| Answer» B. +1/2 | |
| 23. |
Consider a circuit shown in figure:The correct values of Y parameters areA) \(Y_{11}=\dfrac{1}{4} Ʊ, Y_{12}=-\dfrac{5}{4} Ʊ\)B) \(Y_{21}=-\dfrac{3}{4} Ʊ, Y_{22}=-\dfrac{1}{4} Ʊ\)C) \(Y_{11}=\dfrac{5}{4} Ʊ, Y_{12}=-\dfrac{1}{4} Ʊ\)D) \(Y_{21}=-\dfrac{5}{4} Ʊ, Y_{22}=-\dfrac{1}{4} Ʊ\)E) \(Y_{21}=-\dfrac{1}{4} Ʊ, Y_{22}=-\dfrac{3}{4} Ʊ\)Choose the correct answer from the options given below: |
| A. | (B) and (C) only |
| B. | (A) and (D) only |
| C. | (A) and (E) only |
| D. | (C) and (D) only |
| Answer» D. (C) and (D) only | |
| 24. |
Consider the following statements for a symmetrical T section:1. Z11 and Z22 are equal.2. Z12 and Z21 are equal.3. Z11 and Z12 are equal.4. Z21 and Z22 are equal.Which of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 2 and 3 only |
| C. | 3 and 4 only |
| D. | 1, 2, 3 and 4 |
| Answer» B. 2 and 3 only | |