In the transistor amplifier shown in figure, the ratio of small signal voltage gain when the emitter resistor is bypasse

The depletion region (or) space charge region (or) transition region in a semiconductor $$p-n$$ junction diode has

A non inverting op - amp amplifier is shown in figure. The o/p voltage is

Let the magnitude of the gain in the inverting op - amp amplifier circuit shown be $$x$$ with switch $${S_1}$$ open. Whe

The closed - loop transfer function of a control system is given by $${{C\left( s \right)} \over {R\left( s \right)}} =

For the system shown in Figure, with a damping ratio $$\xi $$ of $$0.7$$ and an undamped natural frequency $${\omega _n}

The unit - impulse response of a unity - feedback control system is given by $$c\left( t \right) = - t{e^{ - t}} + 2\,\

Consider the unit step response of a unity feedback control system whose open loop transfer function is $$G\left( s \rig

For a feedback control system of type $$2,$$ the steady state error for a ramp input is

The unit impulse response of a system is given as $$c\left( t \right) = - 4{e^{ - t}} + 6{e^{ - 2t}}.\,\,\,$$ The step

The Boolean expression for the output of the logic circuit shown in figure is

In a $$8085$$ microprocessor, the following instructions may result in change of accumulator contents and change in sta

In the series $$RC$$ circuit shown in Fig. the voltage across $$C$$ starts increasing when the $$d.c.$$ source is switch

In the circuit shown in Fig. $$X$$ $$-$$ is an element which always absorbs power. During a particular operation, it se

A coil (which can be modeled as a series $$RL$$ circuit) has been designed for high $$-$$ $$Q$$ performance at a rated v

The v - i characteristic as seen from the terminal pair (A,B) of the network of Fig.(1) is shown in Fig.(2). If an induc

An advantage of a permanent magnet moving coil instrument is that it is

The scale of a voltmeter is uniform. Its type is

For a given frequency, the deflecting torque of an induction ammeter is directly proportional to

The moving coil in a dynamometer wattmeter is connected

A water boiler at home is switched on to the $$A.C$$ mains supplying power at $$230$$ $$V/50$$ $$Hz.$$ The frequency of

In an oscilloscope the input to the horizontal plates is a $$100Hz$$ voltage signal. The lissajous patterns $$(A), (B)$$

In Figure. The characteristic that corresponds to the variation of synchronous reactance of synchronous motor with field

Unbalanced supply voltage given to a $$3-$$ phase, data-connected induction motor will cause

When the supply voltage to an induction motor is reduced by $$10\% $$, the maximum torque will decrease by approximately

In case of a split phase motor, the phase shift between currents in the two windings is around

An induction motor having full load torque of $$60$$ $$Nm$$ when delta-connected develops a starting torque of $$120$$ $

In an induction motor, if the air gap is increased

During hunting of synchronous motor

The per unit voltage of two synchronous machines connected through a lossless line are $$0.95\,\,\angle \,{10^0}\,\,$$ a

A $$4$$ pole dynamo with wave wound armature has $$51$$ slots containing $$20$$ conductors in each slot. The induced $$e

The function of oil in a transformer is

Auto-transformer is used in transmission and distribution

Keeping in view the requirement of parallel operation, which of the $$3$$-phase connections given below are possible?

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 energy stored in the magnetic field of solenoid $$30$$ $$cm$$ long and $$3$$ $$cm$$ diameter wound with $$1000$$ tur

If v, w, q stand for voltage, energy and charge, then v can be expressed

Which semiconductor power device out of the following is not a current triggered device?

The Triac can be used only in

Which of the following does not cause permanent damage of an $$SCR?$$

In a $$3$$ - phase controlled bridge rectifier, with an increase of overlap angle the output $$dc$$ voltage

In a thyristor $$dc$$ chopper which type of commutation results in best performance?

For a $$500$$ Hz frequency excitation, a $$50$$ km short power line will be modeled as

For equilateral spacing of conductors of an untransposed $$3$$-phase line, we have

During a disturbance on synchronous machine, the rotor swings from A to B before finally settling down to a steady stat

For an unbalanced fault, with paths for zero sequence currents, at the point of fault

Resistance switching is normally employed in

If the fault current is $$2000$$ A, the relay setting is $$50$$% and CT ratio is $$400:5,$$ the plug setting multiplier

Which material is used in controlling chain reaction in a nuclear reactor?

The per unit voltages of two synchronous machines connected through a lossless line are $$0.95\,\angle {10^ \circ }$$ an

If the reference bus is changed in two load flow runs with same system data and power obtained for reference bus taken a

A periodic rectangular signal, $$x(t)$$ has the waveform shown in Figure. Frequency of the fifth harmonic of its spectr