GATE 1996 Electrical Engineering
38 questions across 1 session
Consider the unit step response of a unity feedback control system whose open loop transfer function is $$G\left( s \right) = {1 \over {s\left( {s + 1} \right)}}.$$ The maximum ove...
If v, w, q stand for voltage, energy and charge, then v can be expressed
The torque speed characteristic of a Repulsion motor resembles which of the following dc motor characteristic?
Which type of motor is most suitable for computer printer device?
The Triac can be used only in
Which semiconductor power device out of the following is not a current triggered device?
In a thyristor $$dc$$ chopper which type of commutation results in best performance?
Auto-transformer is used in transmission and distribution
The unit impulse response of a system is given as $$c\left( t \right) = - 4{e^{ - t}} + 6{e^{ - 2t}}.\,\,\,$$ The step response of the same system for $$\,t \ge 0$$ is equal to
Unbalanced supply voltage given to a $$3-$$ phase, data-connected induction motor will cause
For equilateral spacing of conductors of an untransposed $$3$$-phase line, we have
If the fault current is $$2000$$ A, the relay setting is $$50$$% and CT ratio is $$400:5,$$ the plug setting multiplier will be
The unit - impulse response of a unity - feedback control system is given by $$c\left( t \right) = - t{e^{ - t}} + 2\,\,{e^{ - t}},\,\left( {t \ge 0} \right)$$ the open loop transf...
During a disturbance on synchronous machine, the rotor swings from A to B before finally settling down to a steady state at a point C on the power angle curve. The speed of the mac...
Resistance switching is normally employed in
The closed - loop transfer function of a control system is given by $${{C\left( s \right)} \over {R\left( s \right)}} = {1 \over {\left( {1 + s} \right)}}$$ For the input $$\,r\lef...
The energy stored in the magnetic field of solenoid $$30$$ $$cm$$ long and $$3$$ $$cm$$ diameter wound with $$1000$$ turns of wire carrying a current of $$10$$ $$A$$ is
Which material is used in controlling chain reaction in a nuclear reactor?
For a feedback control system of type $$2,$$ the steady state error for a ramp input is
The function of oil in a transformer is
In an induction motor, if the air gap is increased
A coil (which can be modeled as a series $$RL$$ circuit) has been designed for high $$-$$ $$Q$$ performance at a rated voltage and a specified frequency. If the frequency of operat...
If the reference bus is changed in two load flow runs with same system data and power obtained for reference bus taken as specified P and Q in the latter run
The depletion region (or) space charge region (or) transition region in a semiconductor $$p-n$$ junction diode has
Which of the following does not cause permanent damage of an $$SCR?$$
For a $$500$$ Hz frequency excitation, a $$50$$ km short power line will be modeled as
The per unit voltage of two synchronous machines connected through a lossless line are $$0.95\,\,\angle \,{10^0}\,\,$$ and $$1.0\,\,\angle \,{0^0}\,\,$$. Match the two sides in the...
In case of a split phase motor, the phase shift between currents in the two windings is around
When the supply voltage to an induction motor is reduced by $$10\% $$, the maximum torque will decrease by approximately
An induction motor having full load torque of $$60$$ $$Nm$$ when delta-connected develops a starting torque of $$120$$ $$N$$-$$m.$$ For the same simply voltage, if the motor is cha...
Keeping in view the requirement of parallel operation, which of the $$3$$-phase connections given below are possible?
During hunting of synchronous motor
For an unbalanced fault, with paths for zero sequence currents, at the point of fault
The scale of a voltmeter is uniform. Its type is
A water boiler at home is switched on to the $$A.C$$ mains supplying power at $$230$$ $$V/50$$ $$Hz.$$ The frequency of instantaneous power consumed by the boiler is
For a given frequency, the deflecting torque of an induction ammeter is directly proportional to
An advantage of a permanent magnet moving coil instrument is that it is
The moving coil in a dynamometer wattmeter is connected