NTS GAT Subject (Electrical Engineering) FLP 1 Free Quiz

NTS GAT Subject (Electrical Engineering) – FLP 1

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NTS GAT Subject (Electrical Engineering) – FLP 1 consists of 100 MCQs covering 1 subjects. You have 120 minutes to complete it. Start with the easier questions and manage your time wisely. Good luck!

Electrical Engineering 100 MCQs

1. What is Ohm's Law?

A. V = IR B. V = I/R C. V = R/I D. V = I + R

2. What does Kirchhoff's Current Law (KCL) state?

A. Sum of voltages around a loop is zero B. Sum of resistances in series is additive C. Sum of currents entering a node equals sum leaving D. Power is conserved in a circuit

3. Which theorem states that the response to multiple sources is the sum of individual responses?

A. Thevenin theorem B. Superposition theorem C. Norton theorem D. Compensation theorem

4. What condition defines resonance in a series RLC circuit?

A. XL = XC B. XL > XC C. XL < XC D. XL = 0

5. What is the phase relationship between voltage and current in a purely resistive AC circuit?

A. 0° (in phase) B. 90° lagging C. 90° leading D. 180° out of phase

6. What is the phase relationship between voltage and current in a purely inductive AC circuit?

A. Current is in phase with voltage B. Current leads voltage by 90° C. Current lags voltage by 90° D. Current is 180° out of phase

7. What quantity cannot change instantaneously in a capacitor?

A. Current cannot change instantaneously B. Power cannot change instantaneously C. Voltage cannot change instantaneously D. Energy cannot change instantaneously

8. What is the formula for inductive reactance?

A. XL = ωL B. XC = 1/(ωC) C. XL = 1/(ωL) D. XC = ωC

9. What is modulation in communication systems?

A. Demodulation B. Encoding C. Modulation D. Decoding

10. What is the range of frequencies used by a signal called?

A. Amplitude B. Phase C. Bandwidth D. Power

11. What allows multiple signals over a single channel?

A. Spreading B. Coding C. Multiplexing D. Equalization

12. What does FDM use?

A. Time slots B. Code C. Phase D. Different frequency bands

13. What does TDM use?

A. Frequency bands B. Time slots C. Code D. Phase

14. What is used to radiate and receive electromagnetic waves?

A. Amplifiers B. Filters C. Antennas D. Modulators

15. What is the gain of an antenna?

A. Efficiency B. Directivity C. Bandwidth D. Gain

16. What radiates power equally in all directions?

A. Isotropic radiator B. Directional C. Highly directive D. No radiation

17. What is Pulse Amplitude Modulation?

A. PAM B. PPM C. PWM D. PCM

18. What is the Nyquist rate in PCM?

A. At least twice the bandwidth B. Equal to bandwidth C. Half the bandwidth D. One-fourth the bandwidth

19. What approximates analog samples to discrete levels in PCM?

A. Sampling B. Encoding C. Quantization D. Decoding

20. What is an open-loop control system?

A. Uses feedback B. Closed-loop C. Does not use feedback D. Adaptive

21. What is the characteristic equation of a system?

A. Denominator of transfer function = 0 B. Numerator of transfer function = 0 C. Gain = 0 D. Input = 0

22. What does the final value theorem give?

A. Initial value B. Transient C. Steady-state value D. Error

23. What is the steady-state error?

A. Transient error B. Initial error C. Peak error D. Steady-state error

24. What is a Nyquist plot?

A. Bode B. Root locus C. Nyquist D. Nichols

25. What determines overshoot and settling time in a second-order system?

A. Natural frequency B. Gain C. Damping ratio D. Time constant

26. Which gate produces a high output only when all inputs are high?

A. OR B. XOR C. AND D. XNOR

27. Which gate is the complement of OR?

A. NAND B. NOT C. NOR D. XOR

28. Which gate produces a high output when inputs are different?

A. AND B. OR C. NAND D. XOR

29. What is an edge-triggered memory element that stores one bit?

A. Latch (level-triggered) B. Gate C. Decoder D. Flip-flop (edge-triggered)

30. What is a level-sensitive memory element?

A. Flip-flop B. Latch C. Register D. Counter

31. Which flip-flop eliminates the invalid state of SR?

A. D B. T C. JK D. SR

32. What sequential circuit counts pulses?

A. Counter B. Register C. Decoder D. Multiplexer

33. What stores multiple bits of data?

A. Counter B. Decoder C. Register D. Encoder

34. What selects one input from many?

A. Multiplexer B. Demultiplexer C. Decoder D. Encoder

35. What routes one input to many outputs?

A. Multiplexer B. Encoder C. Demultiplexer D. Decoder

36. How many inputs and outputs does a 3-to-8 decoder have?

A. 3 inputs, 3 outputs B. 8 inputs, 3 outputs C. 8 inputs, 8 outputs D. 3 inputs, 8 outputs

37. What type of adder reduces propagation delay?

A. Ripple-carry B. Carry look-ahead C. Serial D. Parallel

38. What is used to display decimal digits in digital circuits?

A. LCD B. LED C. OLED D. Seven-segment display

39. What principle does a transformer work on?

A. Electromagnetic induction B. Electrostatic induction C. Photovoltaic effect D. Thermoelectric effect

40. What is the power relationship in an ideal transformer?

A. V1/V2 = I2/I1 B. V1I1 = V2I2 C. Both A and B D. Neither

41. What is the torque of a DC motor proportional to?

A. Proportional to speed B. Proportional to armature current and flux C. Proportional to voltage D. Constant

42. Why is a transformer core laminated?

A. Reduce eddy current losses B. Increase flux C. Reduce copper losses D. Increase voltage

43. Where is the field winding in an alternator?

A. On the stator B. On the armature C. Both D. On the rotor

44. When is transformer efficiency maximum?

A. Copper losses equal iron losses B. Copper losses are greater than iron losses C. Iron losses are greater than copper losses D. Total losses are zero

45. What is the starting torque of a DC series motor?

A. Very high B. Very low C. Zero D. Constant

46. What does the short-circuit test on a transformer measure?

A. Iron losses B. Both C. Stray losses D. Copper losses

47. What type of commutation does a BLDC motor use?

A. Brushed DC B. Brushless DC with electronic commutation C. AC motor D. Universal motor

48. What is the characteristic of a stepper motor?

A. Discrete steps B. Continuous rotation C. Variable speed D. High speed

49. How is DC motor efficiency calculated?

A. Input / Output B. Losses / Input C. Output / Input D. 1 - Losses

50. What is the effect of armature reaction in a DC machine?

A. Negligible B. Beneficial C. Always positive D. Affects magnetic field distribution

51. What is the phase relationship between magnetizing current and supply voltage in a transformer?

A. 90° out of phase B. In phase C. 180° out of phase D. 45° out of phase

52. What is the magnetic flux through a closed surface according to Gauss's Law?

A. Non-zero B. Zero C. Infinite D. Variable

53. What is electric field intensity?

A. Force per unit charge B. Magnetic field C. Potential D. Current density

54. What is the relationship between D and E?

A. B = μH B. J = σE C. H = B/μ D. D = εE

55. What is permittivity?

A. Permeability B. Permittivity C. Conductivity D. Susceptibility

56. What is the relationship between wavelength, frequency, and speed of light?

A. λ = c/f B. λ = f/c C. λ = c*f D. λ = c/f^2

57. What is the intrinsic impedance of free space?

A. 50 ohms B. 75 ohms C. 377 ohms D. 100 ohms

58. What did Maxwell add to Ampere's Law?

A. Conduction current B. Convection current C. Static current D. Displacement current

59. What is the Laplacian operator?

A. Curl of curl B. Divergence of gradient C. Gradient of divergence D. Divergence of curl

60. What is the relationship between electric and magnetic fields in a plane wave?

A. Parallel B. Perpendicular C. Anti-parallel D. Arbitrary

61. What is an example of a semiconductor material?

A. Silicon or germanium B. Copper C. Glass D. Superconductor

62. What is the primary use of a Zener diode?

A. Rectification B. Voltage regulation C. Amplification D. Oscillation

63. What are the three terminals of a MOSFET?

A. Emitter, base, collector B. Anode, cathode, gate C. Source, base, drain D. Source, drain, gate

64. What is a digital signal?

A. Continuous B. Analog C. Sinusoidal D. Discrete

65. What does a DAC do?

A. DAC B. ADC C. Amplifier D. Filter

66. What is the base of the binary number system?

A. Base 10 B. Base 8 C. Base 2 D. Base 16

67. What is the base of the hexadecimal number system?

A. Base 2 B. Base 8 C. Base 10 D. Base 16

68. What circuit generates a periodic signal without external input?

A. Oscillator B. Amplifier C. Rectifier D. Filter

69. What filter passes frequencies above a cutoff?

A. Low-pass B. High-pass C. Band-pass D. Band-stop

70. What is the bandwidth of a filter?

A. Bandwidth B. Center frequency C. Quality factor D. Gain

71. What does a rectifier do?

A. DC to AC B. AC to DC C. DC to DC D. AC to AC

72. What does a chopper do?

A. AC to DC B. DC to AC C. DC to DC D. AC to AC

73. What is the principle of a switching regulator?

A. Linear regulation B. Switching regulation C. Diode regulation D. Transformer

74. What does a buck-boost converter do?

A. Only steps down B. Only steps up C. Provides isolation D. Steps up or down with inversion

75. What is a Cuk converter?

A. Buck B. Cuk C. Boost D. Flyback

76. What type of converter is used for isolated power supplies?

A. Flyback B. Boost C. Buck D. Cuk

77. What device conducts in one direction and blocks reverse voltage?

A. Thyristor B. Diode C. Transistor D. Triac

78. What device combines MOSFET and BJT characteristics?

A. IGBT B. MOSFET C. BJT D. Thyristor

79. What causes higher switching losses and EMI?

A. Soft switching B. Resonant C. Hard switching D. Zero switching

80. What type of converter uses a resonant circuit?

A. Hard switching B. Linear C. Nonlinear D. Resonant

81. What type of converter changes the voltage level of a DC supply?

A. AC-DC B. DC-DC C. DC-AC D. AC-AC

82. What does power factor correction do?

A. Increase power B. Decrease power C. Increase losses D. Improve power factor

83. What provides backup power?

A. Voltage regulator B. UPS C. Inverter D. Rectifier

84. What are the three main components of a power system?

A. Generation, transmission, distribution B. Only generation C. Only transmission D. Only distribution

85. Why are short circuit studies performed?

A. Load flow B. Short circuit C. Stability D. Economic dispatch

86. What does load flow analysis determine?

A. Voltage magnitudes and angles B. Fault currents C. Stability limits D. Harmonic content

87. What is a busbar in a power system?

A. A transformer B. A generator C. A common connection point (busbar) D. A load

88. What effect causes current to flow near the conductor surface at high frequencies?

A. Skin effect B. Proximity effect C. Corona D. Ferranti effect

89. What is a synchronous condenser?

A. A generator B. A transformer C. A capacitor bank D. A synchronous motor for reactive compensation

90. What is the load factor?

A. Average load / Peak load B. Peak load / Average load C. Average load * Peak load D. 1 - Average/Peak

91. What is a continuous-time signal?

A. Defined at every instant B. Defined only at discrete instants C. Digital D. Quantized

92. What is a periodic signal?

A. Periodic B. Aperiodic C. Random D. Deterministic

93. What is a time-invariant system?

A. Linear B. Non-linear C. Time-varying D. Time-invariant

94. What is a causal system?

A. Non-causal B. Causal C. Anticausal D. Memoryless

95. What is the impulse response of a system?

A. Impulse response B. Step response C. Ramp response D. Frequency response

96. What does the Nyquist-Shannon sampling theorem state?

A. Half the highest frequency B. At least twice the highest frequency C. Equal to the highest frequency D. Four times the highest frequency

97. What occurs when a signal is sampled below the Nyquist rate?

A. Aliasing B. Quantization C. Noise D. Distortion

98. What measures a signal's similarity with a shifted version?

A. Cross-correlation B. Convolution C. Filtering D. Autocorrelation

99. What measures similarity between two signals?

A. Autocorrelation B. Cross-correlation C. Convolution D. Filtering

100. What does a pole at the origin in the s-plane represent?

A. Zero B. Differentiator C. Delay D. Integrator or constant

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