1) Under which conditions does the source transformation technique remain directly unapplicable?
a. Only in the absence of impedance in series with a voltage source
b. Only in the absence of impedance in parallel with a current source
c. Both a and b
d. None of the above
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2) If innumerable branches are present in parallel configuration in a network, which method approves to be extensively beneficial for network analysis?
a. Node method
b. Mesh method
c. Both a and b
d. None of the above
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3) Which operation is likely to get executed or performed by Millman's theorem in terms of converting the voltage or current sources into a single equivalent voltage or current source?
a. Subtraction
b. Combination
c. Differentiation
d. Integration
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4) Why does the Superposition theorem not applicable to power?
a. Because it is proportional to square of current and current is a non-linear function
b. Because it is proportional to square of voltage and voltage is a non-linear function
c. Both a and b
d. None of the above
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Answer
Explanation
Related Ques
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ANSWER: Because it is proportional to square of current and current is a non-linear function
Explanation:
No explanation is available for this question!
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5) What would be an order of branch impedance matrix for the below stated KVL equilibrium equation on the basis of loop or mesh analysis?
E = B (Vs – Zb Is)
a. b x 1
b. b x b
c. b-n+1) x 1
d. (b-n+1) x b
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6) According to the graph theory of loop analysis, how many equilibrium equations are required at a minimum level in terms of number of branches (b) and number of nodes (n) in the graph?
a. n-1
b. b+(n-1)
c. b-(n-1)
d. b/ n-1
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7) What would be the nature of roots for undamped type of circuits with sustained oscillations?
a. Purely imaginary
b. Real, equal & negative
c. Complex conjugate with negative real part
d. Real, unequal & negative
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8) What will be the value of the time required by the response to reach 50% of its steady state value for second order system?
a. π – θ /ωd
b. π / ωd
c. 4 / ξ ωn
d. (1+ 0.7 ξ) /ωn
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9) What will be the nature of impedance at a frequency below the antiresonant frequency?
a. Capacitive
b. Inductive
c. Reactive
d. Resistive
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10) If the value of resonant frequency is 50 kHz in a series RLC circuit along with the bandwidth of about 1 kHz, then what would be the value of quality factor?
a. 5
b. 50
c. 100
d. 500
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11) What would be the value of attenuation constant especially for the network consisting of purely reactive elements?
a. 0
b. 1
c. -1
d. Infinity
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12) Suppose that a network consists of purely resistive elements, what will be the value of propagation constant (generated output) in terms of attenuation constant and phase constant from the following?
a. γ = α + j0
b. γ = 0 + jβ
c. γ = 0 – jβ
d. γ = α - j0
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13) It is possible to overcome the drawback of m-derived filter by connecting number of sections in addition to prototype & m-derived sections with terminating __________
a. One-fourth sections
b. Half sections
c. Square of three-fourth sections
d. Full sections
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14) What is an ideal value of attenuation for the frequencies in pass band especially for a cascade configuration?
a. Zero
b. Unity
c. Infinity
d. Unpredictable
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15) Variable attenuators exhibit variable attenuation but constant __________
a. Input impedance
b. Output impedance
c. Both a and b
d. None of the above
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16) In accordance to the circuit configuration of bridged 'T' variable attenuator below, how many resistors should be varied in order to achieve variable attenuation?
a. Only one
b. Two
c. Three
d. Four
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17) If the value of (P1 / P2) in power ratio expressed in terms of dB is greater than unity, what does 'D' indicate in the network?
a. Power loss
b. Power gain
c. Power stability
d. Power saving
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18) What will be the driving point impedance of Laplace domain network shown below?
a. (10s2 + 5.25s + 1.5) / (s+0.125)
b. (6s2 + 2.25s + 1.5) / (s+0.25)
c. (5s2 + 2.25s + 1.5) / (s+0.16)
d. (8s2 + 2.25s + 1.5) / (s+0.8)
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19) Consider the RC circuit shown below. What will be the value of time constant for RC circuit?
a. 0.25 sec
b. 0.50 sec
c. 1 sec
d. 2 sec
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20) What would be the value of i(t) especially for t > 0 in the RC circuit shown below? [Assume that the polarities of vc (0-) are similar to the drop across capacitor due to i(t)]
a. -2.125 e-1t A
b. -4.125 e-2t A
c. -8 e-4t A
d. -10 e-5t A
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21) For the pole-zero plot given below, what would be the value of system function H(s), if the d.c. gain of the system is 20?
a. 10 (s + 4) / (s + 1) (s2 + 6s - 10)
b. 20 (s - 4) / (s + 3) (s2 _ 6s +10)
c. 40 (s + 4) / (s + 3) (s2 - 6s - 10)
d. 50 (s + 4) / (s + 1) (s2 + 6s +10)
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22) Which oscillations will be generated in the time domain response, if complex conjugate poles are present with negative real part?
a. Damped oscillations
b. Undamped oscillations
c. Sustained oscillations
d. None of the above
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23) Which among the below mentioned cases are responsible for generating the oscillations with increasing amplitude in time domain response of system function?
A. Complex poles with positive real part
B. Complex poles with negative real part
C. Repeated poles on imaginary axis
D. Repeated poles on real axis
a. A & C
b. B & D
c. B & C
d. A & D
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24) How is the short circuit reverse transfer admittance (y12) calculated in terms of current and voltage ratio?
a. V2/ I1 (keeping I2 = 0)
b. I2/ V1 (keeping V2 = 0)
c. I1/ V2 (keeping V1 = 0)
d. V1/ I2 (keeping I1 = 0)
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25) An open circuit reverse voltage gain in h-parameters is a unitless quantity and generally equivalent to ________
a. V1 / I1 (keeping V2 = 0)
b. I2 / I1 (keeping V2 = 0)
c. V1 / V2 (keeping I1 = 0)
d. I2 / V2 (keeping I1 = 0)
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26) Which is the correct condition of symmetry observed in z-parameters?
a. z11 = z22
b. z11 = z12
c. z12 = z22
d. z12 = z21
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27) Which among the following represents the precise condition of reciprocity for transmission parameters?
a. AB - CD = 1
b. AD – BC = 1
c. AC – BD = 1
d. None of the above
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28) If the two ports are connected in cascade configuration, then which arithmetic operation should be performed between the individual transmission parameters in order to determine overall transmission parameters?
a. Addition
b. Subtraction
c. Multiplication
d. Division
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29) 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?
a. 4 / 160
b. 5 / 160
c. 10 / 160
d. 15 / 150
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