Electrical Engineering GATE 2016 Set-1 Questions with Answer

Ques 14 Control Systems

Loop transfer function of a feedback system is G(s)H(s) = (s+3)/(s²(s-3)). Take the Nyquist contour in the clockwise direction. Then, the Nyquist plot of G(s)H(s) encircles -1+j0

Ques 15 Control Systems

Given the following polynomial equation
s³ + 5.5s² + 8.5s + 3 = 0,
the number of roots of the polynomial, which have real parts strictly less than -1, is ________.

Ques 16 Digital Electronics

A temperature in the range of -40°C to 55°C is to be measured with a resolution of 0.1°C. The minimum number of ADC bits required to get a matching dynamic range of the temperature sensor is

Ques 17 Digital Electronics

Consider the following circuit which uses a 2-to-1 multiplexer as shown in the figure below. The Boolean expression for output F in terms of A and B is

Ques 18 Digital Electronics

The current state Q_AQ_B of a two JK flip-flop system is 00. Assume that the clock rise-time is much smaller than the delay of the JK flip-flop. The next state of the system is

Ques 19 Digital Electronics

A 2-bit flash Analog to Digital Converter (ADC) is given below. The input is 0 ≤ V_IN ≤ 3 Volts. The expression for the LSB of the output B₀ as a Boolean function of X₂, X₁, and X₀ is

Ques 20 Electrical Machines

In a constant V/f induction motor drive, the slip at the maximum torque

Ques 21 Electrical Machines

A 4-pole, lap-connected, separately excited dc motor is drawing a steady current of 40 A while running at 600 rpm. A good approximation for the waveshape of the current in an armature conductor of the motor is given by

Ques 22 Electrical Machines

A single-phase 400 V, 50 Hz transformer has an iron loss of 5000 W at the rated condition. When operated at 200 V, 25 Hz, the iron loss is 2000 W. When operated at 416 V, 52 Hz, the value of the hysteresis loss divided by the eddy current loss is ________.

Ques 23 Electrical Machines

A DC shunt generator delivers 45 A at a terminal voltage of 220 V. The armature and the shunt field resistances are 0.01 Ω and 44 Ω respectively. The stray losses are 375 W. The percentage efficiency of the DC generator is ________.

Ques 24 Electrical Machines

A three-phase, 50 Hz salient-pole synchronous motor has a per-phase direct-axis reactance (X_d) of 0.8 pu and a per-phase quadrature-axis reactance (X_q) of 0.6 pu. Resistance of the machine is negligible. It is drawing full-load current at 0.8 pf (leading). When the terminal voltage is 1 pu, per-phase induced voltage, in pu, is ________.

Ques 25 Electrical Machines

A single-phase, 22 kVA, 2200 V/ 220 V, 50 Hz, distribution transformer is to be connected as an auto-transformer to get an output voltage of 2420 V. Its maximum kVA rating as an auto-transformer is

Ques 26 Electrical Measurements

A dc voltage with ripple is given by v(t) = [100 + 10sin(ωt) - 5sin(3ωt)] volts. Measurements of this voltage v(t), made by moving-coil and moving-iron voltmeters, show readings of V₁ and V₂ respectively. The value of V₂ - V₁, in volts, is ________.