Electrical engineering MCQ Quiz Hub

1. The scale factor is denoted by the letter?
G
H
I
J

2. The zeros in the transfer function are denoted by?
3
2
1
0

3. The poles in the transfer function are denoted by?
x
y
z
w

4. The network function N (S) becomes _________ when s is equal to anyone of the zeros.
1
2
0
∞

5. The N (S) becomes ________ when s is equal to any of the poles.
∞
0
1
2

6. If the poles or zeros are not repeated, then the function is said to be having __________ poles or ________ zeros.
simple, multiple
multiple, simple
simple, simple
multiple, multiple

7. If the poles or zeros are repeated, then the function is said to be having __________ poles or ________ zeros.
multiple, multiple
simple, simple
multiple, simple
simple, multiple

8. If the number of zeros (n) are greater than the number of poles (m), then there will be _________ number of zeros at s = ∞.
n
m
n-m
n+m

9. If the number of poles (m) are greater than the number of zeros (n), then there will be _________ number of zeros at s = ∞.
m+n
m-n
m
n

10. The driving point function is the ratio of polynomials in s. Polynomials are obtained from the __________ of the elements and their combinations.
transform voltage
transform current
transform impedance
transform admittance

11. The pole is that finite value of S for which N (S) becomes __________
0
1
2
∞

12. A function N (S) is said to have a pole (or zero) at infinity if the function N (1/S) has a pole (or zero) at S = ?
∞
2
0
1

13. The number of zeros including zeros at infinity is __________ the number of poles including poles at infinity.
greater than
equal to
less than
greater than or equal to

14. The poles of driving point impedance are those frequencies corresponding to ___________ conditions.
short circuit
voltage source
open circuit
current source

15. The zeros of driving point impedance are those frequencies corresponding to ___________ conditions.
current source
open circuit
voltage source
short circuit

16. In the driving point admittance function, a zero of Y (s) means a _______ of I (S).
1
2
3
zero

17. In the driving point admittance function, a pole of Y (s) means a _______ of V (S).
zero
1
2
3

18. The real part of all zeros and poles must be?
positive or zero
negative or zero
positive
negative

19. Poles or zeros lying on the jω axis must be?
complex
at least one complex pole
at least one complex zero
simple

20. The coefficients of numerator polynomial and the denominator polynomial in a transfer function must be?
real
complex
at least one real coefficient
at least one complex coefficient

21. In a transfer function, the degree of numerator polynomial is ___________ than the degree of the denominator polynomial.
greater than
less than
equal to
less than or equal to

22. The real parts of all poles and zeros in a driving point function must be?
zero
negative
zero or negative
positive

23. If the real part of driving point function is zero, then the pole and zero must be?
complex
simple
one complex pole
one complex zero

24. Two ports containing no sources in their branches are called?
active ports
passive ports
one port
three port

25. Two ports containing sources in their branches are called?
three port
one port
passive ports
active ports

26. The short-circuit admittance matrix of a two port network is as follows. [0; -0.5; 0.5; 0] Then the 2 port network is ____________
Non-reciprocal and passive
Non-reciprocal and active
Reciprocal and passive
Reciprocal and active

27. A network is said to be symmetrical if the relation between A and D is?
A = D
A = 2 D
A = 3 D
A = 4 D

28. How many incandescent lamps connected in series would consume the same total power as a single 100 W/220 V incandescent lamp. The rating of each lamp is 200 W/220 V?
Not possible
4
3
2

29. Two networks are connected in series parallel connection. Then, the forward short-circuit current gain of the network is ____________
Product of Z-parameter matrices
Sum of h-parameter matrices
Sum of Z-parameter matrices
Product of h-parameter matrices

30. The relation AD – BC = 1, (where A, B, C and D are the elements of a transmission matrix of a network) is valid for ___________
Both active and passive networks
Passive but not reciprocal networks
Active and reciprocal networks
Passive and reciprocal networks

31. For a 2 port network, the transmission parameters are given as 10, 9, 11 and 10 corresponds to A, B, C and D. The correct statement among the following is?
Network satisfies both reciprocity and symmetry
Network satisfies only reciprocity
Network satisfies only symmetry
Network satisfies neither reciprocity nor symmetry

32. If for a circuit the value of the h parameter is given as h = [8, 2/3; -2/3, 4/9]. Then the value of the voltage source V is _________________
2.38 V
1.19 V
1.6 V
3.2 V

33. A periodic voltage v (t) = 1 + 4 sin ωt + 2 cos ωt is applied across a 1Ω resistance. The power dissipated is ____________
1 W
11 W
21 W
24.5 W

34. Permeability is analogous to _____________
Conductivity
Resistivity
Retentivity
Coercivity

35. A resistance and an inductance are connected in parallel and fed from 50 Hz ac mains. Each branch takes a current of 5 A. The current supplied by source is ____________
10 A
7.07 A
5 A
0 A

36. A triangular Pulse of 50 V peak is applied to a capacitor of 0.1 F. The change of the capacitor and its waveform shape is ___________
10 rectangular
5 rectangular
5 triangular
10 triangular

37. A 10 μF capacitor is charged from a 5 volt source through a resistance of 10 kΩ. The charging current offer 35 m sec. If the initial voltage on C is – 3 V is ___________
0.56 mA
5.6 mA
6 mA
5 μA

38. If the diameter of a wire is doubled, the current carrying capacity of the wire is ___________
Half
Twice
Four times
One-fourth

39. Consider an RL series circuit having resistance R = 3 Ω, inductance L = 3 H and is excited by 6V. The current after a long time after closing of switch is ____________
1 A
2 A
0 A
Infinity

40. The energy stored in a coil is 108 J. The power dissipated instantaneously across the blades of switch after it is opened in 10 ms is ____________
108 W
1080 W
10800 W
108000 W

41. Barletts Bisection Theorem is applicable to ___________
Unsymmetrical networks
Symmetrical networks
Both unsymmetrical and symmetrical networks
Neither to unsymmetrical nor to symmetrical networks

42. The Thevenin’s equivalent of a network is a 10 V source in series with 2 Ω resistances. If a 3 Ω resistance is connected across the Thevenin’s equivalent is _____________
10 V in series with 1.2 Ω resistance
6 V in series with 1.2 Ω resistance
10 V in series with 5 Ω resistance
6 V in series with 5 Ω resistance

43. Two coils X and Y have self-inductances of 5 mH and 10 mH and mutual inductance of 3 mH. If the current in coils X change at a steady rate of 100 A/s, the emf induced in coil Y is ____________
0.3 V
0.5 V
1 V
1.5 V

44. A 50 Hz current has an amplitude of 25 A. The rate of change of current at t = 0.005 after i = 0 and is increasing is ____________
2221.44 A/s
0
-2221.44 A/s
-3141.6 A/s

45. Consider a series RL circuit in which current 12 A is flowing through R and current 16 A is flowing through L. The current supplied by the sinusoidal current source I is ____________
28 A
4 A
20 A
Cannot be determined

46. Consider a circuit having resistances 16 Ω and 30 Ωis excited by a voltage V. A variable resistance R is connected across the 16 Ω resistance. The power dissipated in 30 Ω resistance will be maximum when value of R is __________
30 Ω
16 Ω
9 Ω
0

47. Consider a cube having resistance R on each of its sides. For this non-planar graph, the number of independent loop equations are _______________
8
12
7
5

48. A network contains linear resistors and ideal voltage source S. If all the resistors are made twice their initial value, then voltage across each resistor is __________
Halved
Doubled
Increases by 2 times
Remains same

49. Consider a circuit having resistance 10 kΩ, excited by voltage 5 V and an ideal switch S. If the switch is repeatedly closed for 2 ms and opened for 2 ms, the average value of i(t) is ____________
0.25 mA
0.35 mA
0.125 mA
1 mA

50. A particular electric current is made up of two components a 10 A, a sine wave of peak value 14.14 A. The average value of electric current is __________
0
24.14 A
10 A
14.14 A