1. A passive network is one which contains:
a) Only variable resistance
b) Only some sources of e.m.f. in it
c) Only two sources of e.m.f. in it
d) No source of e.m.f. in it
2. Which of the following is not the properties of transfer function?
a) all initial conditions of the system are set to zero
b) The transfer function is dependent on the input of the system
c) It is defined only for a linear time-invariant system
d) The transfer function between an input variable and an output variable of a
system is defined as the Laplace transform of the impulse response
3. The poles and zeros of driving point impedance function and driving point
admittance function lie on
a) Left half of s-plane
b) Right half of s-plane
c) Left half of s-plane or on imaginary axis
d) Right half of s-plane or imaginary axis
4. In non-linear network does not satisfy
a) Superposition condition
b) Homogeneity condition
c) Both homogeneity and superposition condition
d) Homogeneity, superposition and associative condition
5. Which of the following is true about band stop filters?
a) Obtained by parallel connection of low pass and high pass filters.
b) Obtained by cascade connection of low pass and high pass filters.
c) Cut off frequency of high pass filter must be less than low pass filter.
d) All
6. A filter that passes all frequencies lying outside a certain range, while it attenuates
all frequencies between the two designated frequencies is called?
a) low pass filter
b) high pass filter
c) band elimination filter
d) band pass filter
7. According to routh tabulation method, the system is said to be stable if there are no
sign changes in the first column of the routh array, the number of poles lies on the
left half of s-plane =number of sign changes.
a) True
b) False
8. For the Reciprocity Theorem to satisfy the ratio of response to excitation before and
after the source is replaced should be?
a) Different
b) Same
c) before source is replaced is greater than after the source is replaced
d) before source is replaced is less than after the source is replaced
9. Which one the following true about symmetry theorem for the two port electrical
networks.
a) For z parameters open circuit driving point impedance must be equal to be
symmetrical network.
b) For Y parameters short circuit driving point admittance must be equal to be
symmetrical network.
c) For h and g parameters determinants of corresponding h and g parameters
must be equal to 1 to be symmetrical network.
d) All the above
10. A network either T or π, is said to be of the constant-k type if Z1 and Z2 of the
network satisfies the relation?
a) Z1Z2 = k
b) Z1Z2 = k2
c) Z1Z2 = k3
d) Z1Z2 = k4
11. Determine the range of K so that the system given by characteristic equation.
S3 +3KS2 +(K+5)S+4=0 is stable.
a. K < -5.253
b. K > 0.2537
c. K > 0.528
d. K < -2.525
12. The driving point impedance of a one-port reactive network is given by
Z(s)=(5(s2+4)(s2+25))/(s(s2+16)). After taking the partial fractions, find the coefficient of 1/s.
a. 25/4
b. 50/4
c. 100/4
d. 125/4
13. Consider the polynomial P (s)= s3 + 2s2 +3s+6The given polynomial P (s) is
Hurwitz.
a. True
b. False
14. Determine the driving point impedance Y11 (S) in the circuit shown below.
a.(5s2 – 5s+1)/(2s2+7s+2)
b.(5s2 +5s+1)/(2s2 +7s – 2)
c.(5s2 +5s -1)/(2s2+7s+2)
d.(5s2 +5s+1)/(2s2 +7s+2)
15. Obtain the current transfer ratio α21 of the network shown below.
a.(6s- 8)/(8s3 +4s2 +4s+1)
b.(5s2+5s+1)/(2s2+7s+2)
c.(6s+8)/(8s3+ 4s2 +4s+1)
d.1/(8s3+ 4s2 +4s-1)
16. For the circuit given below, the value of Transmission parameter A and C are
a. A = -0.7692 + j0.3461 Ω, C = 0.03461 + j0.023 Ω
b. A = 0.7692 + j0.3461 Ω, C = 0.03461 + j0.023 Ω
c. A = -0.7692 – j0.3461 Ω, C = -0.03461 + j0.023 Ω
d. A = 0.7692 – j0.3461 Ω, C = 0.023 + j0.03461 Ω
17. The dependent source in Figure below is:
a. Voltage-controlled current source
b. Voltage-controlled voltage source
c. Current-controlled voltage source
d. Current-controlled current source
18. If the current in an electric conductor is 2.4 A, how many coulombs of charge pass
any point in a 30-second interval?
a. 7.2 C
b. 72 C
c. 7.2mC
d. 72mC
19. After 10.61 x 1013 electrons are added to a metal plate, it has a negative charge of
3µC. What was its initial charge in coulombs?
a. +14 µC
b. -14 µC
c. +17 µC
d. -17 µC
20. A network has 16 branches and 9 independent loops. How many nodes are there in
the network?
a. 19
b. 5
c. 8
d. 4
21. Which of the circuits in Figure below will give you Vab =7V?
22.A resistor R is connected in series with a parallel circuit comprising two resistances
of 12 Ω and 8 Ω. The total power dissipated in the circuit is 700 watts when the
applied voltage is 200 V. calculate the value of R.
a. 15 Ω
b. 25.34 Ω
c. 52.34 Ω
d. 30.34 Ω
23.What will be the equivalent resistance at the terminals a-b for the below circuit
a. 11.25 Ω
b. 25 Ω
c. 36.25 Ω
d. 31.5 Ω
24. Compute Vo in the below circuit
a. 2.67 V
b. 1.80 V
c. -1.33 V
d. 1.33 V
25. The Thevenin resistance at terminals A and B and The Thevenin voltage across
terminals A and B of the circuit below is
a. Rth = 16 Ω and Vth = 5 V
b. Rth = 3 Ω and Vth = 19.74 V
c. Rth = 4 Ω and Vth = 5 V
d.Rth = 12 Ω and Vth = 16 V
26. The current i in the circuit shown below is:
a. -2.667 A
b. -0.667 A
c. 0.667 A
d. 2.667 A
27. For the circuit shown below, current i1 is:
a. 4 A
b. 3 A
c. 2 A
d. 1 A
28. A load is connected to a network. At the terminals to which the load is connected,
RTh = 10 Ω and VTh = 40 V. The maximum possible power supplied to the load is:
a. 160 W
b. 80 W
c. 40 W
d. 1 W
29. The Norton current at terminals a and b of the circuit shown below is:
a. 10 A
b. 2.5 A
c. 5 A
d. 0 A
30. For the below figure, what will be the value of the voltage VA
a. 84 V
b. 6 V
c. 24 V
d. 14 V
31. Calculate vo(t) in the circuit shown below
a. 20<900
b. 14.14<450
c. 17.14<900
d. 17.14<-900
32. In a certain series resonant circuit, VC = 150 V, VL= 150 V, and VR= 50 V. The value of
the source voltage is
a. 150 V
b. 300 V
c. 350 V
d. 50 V
33. The switch in the circuit in below Figure has been closed for a long time, and it is
opened at t = 0. Find v(t) for t ≥ 0.
a. 15 V
b. 15𝑒-5𝑡
c. 15𝑒-0.2𝑡
d. 0 V
34. If the load impedance is 20 – j20, the power factor is
a. ⟨-45
b. 0
c. 1
d. 0.7071
35. What is a digital-to-analog converter?
A. It stores digital data on the computer.
B. It converts alternating current (AC) into direct current (DC).
C. It converts electrical power into mechanical power.
D. It takes the digital data from an audio CD and converts it to a useful
form.
36. Which of the following is not correct for Digital Circuits?
A. Less susceptible to noise or degradation in quality
B. Use transistors to create logic gates to perform Boolean logic
C. Easier to perform error detection and correction with digital signal
D. Less versatile and precision
37. How must the output of a gate in a TTL digital circuit act when it is HIGH?
A. Acts as a voltage source
B. Acts as a current sink
C. Acts as a current source
D. Acts as a voltage sink
38. If a signal passing through a gate is inhibited by sending a LOW into one of the
inputs, and the output is HIGH, the gate is a(n):
A. AND
B. NAND
C. NOR
D. OR
39. The format used to present the logic output for the various combinations of logic
inputs to a gate is called a(n):
A. Boolean constant
B. Boolean variable
C. Truth table
D. Logic function
40. A logic probe is again applied to the pins of a 7421 IC with the following results. Is
there a problem with the circuit and if so, what is the problem?
A. Pin 6 should be ON
B. Pin 8 should be ON.
C. Pin 8 should be pulsing.
D. no problem
41. The circuit of the given figure-1 realizes the function
A. (A’+B’)C+ (DE)’
B. A’+B’+C’+D’+E’
C. AB+C+DE
D. AB+C(D+E)
42. In the given figure-2, A = B = 1 and C = D = 0. Then Y =
