What are the questions asked in GATE 2018 Electrical Engineering exam?

Complete set of questions from GATE 2018 EE exam covering Power Systems, Electrical Machines, Control Systems, Power Electronics, Analog and Digital Electronics, Signals and Systems, Electromagnetic Theory, Network Theory, Measurements, and more with detailed solutions.

Where can I download GATE 2018 Electrical Engineering question paper?

You can download the complete GATE 2018 Electrical Engineering question paper with solutions from ExamPrev. The PDF includes all questions with detailed explanations.

How many questions were in GATE 2018 EE paper?

GATE 2018 Electrical Engineering paper consisted of 65 questions including MCQs, MSQs, and numerical answer type questions covering all major electrical engineering topics.

Are solutions provided for GATE 2018 EE questions?

Yes, detailed step-by-step solutions with explanations are provided for all questions from GATE 2018 Electrical Engineering paper.

What topics are covered in GATE 2018 Electrical Engineering paper?

GATE 2018 EE covers Power Systems, Electrical Machines, Control Systems, Power Electronics, Analog Electronics, Digital Electronics, Signals and Systems, Electromagnetic Theory, Network Theory, Measurements and Instrumentation, and Engineering Mathematics.

Electrical Engineering Gate 2018 Questions with Answer

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Ques 27 GATE 2018

The voltage across the circuit in the figure, and the current through it, are given by the following expressions:

If the average power delivered to the circuit is zero, then the value of X (in Ampere) is _____ (up to 2 decimal places).

(10.00) is the correct answer.

Ques 28 GATE 2018

The voltage v(t) across the terminals a and b as shown in the figure, is a sinusoidal voltage having a frequency ω = 100 radian/s. [cite: 118, 119] When the inductor current i(t) is in phase with the voltage v(t), the magnitude of the impedance Z (in Ω) seen between the terminals a and b is ________ (up to 2 decimal places).

(50.00) is the correct answer.

Ques 29 Gate 2018

A single-phase 100 kVA, 1000 V / 100 V, 50 Hz transformer has a voltage drop of 5% across its series impedance at full load. Of this, 3% is due to resistance. The percentage regulation of the transformer at full load with 0.8 lagging power factor is

4.8

6.8

8.8

10.8

Ques 30 Gate 2018

In a salient pole synchronous motor, the developed reluctance torque attains the maximum value when the load angle in electrical degrees is

(b) is the correct answer.

Ques 31 GATE 2018

A separately excited dc motor has an armature resistance R_a=0.05 Ω. The field excitation is kept constant. At an armature voltage of 100 V, the motor produces a torque of 500 Nm at zero speed. Neglecting all mechanical losses, the no-load speed of the motor (in radian/s) for an armature voltage of 150 V is ________ (up to 2 decimal places).

(600) is the correct answer.

Ques 32 GATE 2018

A transformer with toroidal core of permeability $\mu$ is shown in the figure. Assuming uniform flux density across the circular core cross-section of radius $r<

^μV_{r²N_P²ω}/I

^{μIr²N_pN_Sω}/V

^{μVr²N_P²ω}/2I

^{μIr²N_P²ω}/2V

(d) is the correct answer.

Ques 33 GATE 2018

A 3-phase 900 kVA, 3 kV / (3 / √3) kV (∆/Y), 50 Hz transformer has primary (high voltage side) resistance per phase of 0.3 Ω and secondary (low voltage side) resistance per phase of 0.02 Ω. [cite: 107] Iron loss of the transformer is 10 kW. The full load % efficiency of the transformer operated at unity power factor is _______ (up to 2 decimal places).

(97.20) is the correct answer.

Ques 34 GATE 2018

A 200 V DC series motor, when operating from rated voltage while driving a certain load, draws 10 A current and runs at 1000 r.p.m. [cite: 109] The total series resistance is 1 $\Omega$. [cite: 110] The magnetic circuit is assumed to be linear. [cite: 111] At the same supply voltage, the load torque is increased by 44%. The speed of the motor in r.p.m. [cite: 111, 112] (rounded to the nearest integer) is ________ .

(825) is the correct answer.

Ques 35 GATE 2018

The equivalent circuit of a single phase induction motor is shown in the figure, where the parameters are X_l1 = X_l2 = 2 Ω, R₁ = R₂ = 2 Ω, X_M = 240 Ω and s is the slip. [cite: 115] At no-load, the motor speed can be approximated to be the synchronous speed. [cite: 116, 117] The no-load lagging power factor of the motor is___________ (up to 3 decimal places).

(0.105) is the correct answer.

Ques 36 GATE 2018

A positive charge of 1 nC is placed at (0, 0, 0.2) where all dimensions are in metres. Consider the x-y plane to be a conducting ground plane. Take ε₀ = 8.85 × 10^-12 F/m. The Z component of the E field at (0, 0, 0.1) is closest to

899.18 V/m

-899.18 V/m

999.09 V/m

-999.09 V/m

(d) is the correct answer.

Ques 37 GATE 2018

The capacitance of an air-filled parallel-plate capacitor is 60 pF. When a dielectric slab whose thickness is half the distance between the plates, is placed on one of the plates covering it entirely, the capacitance becomes 86 pF. Neglecting the fringing effects, the relative permittivity of the dielectric is _____________ (up to 2 decimal places).

(2.53) is the correct answer.

Ques 38 GATE 2018

Let f be a real-valued function of a real variable defined as f(x) = x² for x ≥ 0, and f(x) = -x² for x < 0. Which one of the following statements is true?

f(x) is discontinuous at x=0.

f(x) is continuous but not differentiable at x=0.

f(x) is differentiable but its first derivative is not continuous at x=0

f(x) is differentiable but its first derivative is not differentiable at x=0.

(d) is the correct answer.

Ques 39 GATE 2018

The value of the directional derivative of the function Φ(x, y, z) = x y² + y z² + z x² at the point (2, -1, 1) in the direction of the vector p = i + 2j + 2k is

0.95

0.93

0.9

(a) is the correct answer.

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