An analog electronic circuit that measures $$rms$$ value of the input voltage by averaging the square of the instantane

An active filter consisting of an op-amp, resistor $${R_1},\,\,{R_2},\,\,{R_3}$$ and two capacitors of value $$C$$ each,

The feedback factor for the circuit shown in fig. is

A current amplifier has an input resistance of $$10\Omega ,$$ an output resistance of $$10\,\,k\Omega $$ and a Current g

In the circuit of figure, the value of the base current $${{\rm I}_B}$$ will be

The type of power amplifier which exhibits crossover distortion in its output is

The circuit shown in figure uses an ideal op-amp working with $$+5V$$ and $$-5V$$ power supplies. The output voltage $${

Feedback control systems are

A linear time-invariant system initially at rest, when subjected to a unit-step input, gives a response $$y\left( t \rig

A unity feedback system has open loop transfer function $$G(s).$$ The steady-state error is zero for

A unity feedback system has open-loop transfer function $$G\left( s \right) = {{25} \over {s\left( {s + 6} \right)}}.$$

A unity feedback system has open loop transfer function $$G\left( s \right) = {{K\left( {s + 5} \right)} \over {s\left(

Open-loop transfer function of a unity - feedback system is $$$G\left( s \right) = {G_1}\left( s \right).{e^{ - s{\tau

$$D\left( s \right) = {{\left( {0.5s + 1} \right)} \over {\left( {0.05s + 1} \right)}}$$ Maximum phase lead of the comp

Consider the state equation $$\mathop X\limits^ \bullet \left( t \right) = Ax\left( t \right)$$ Given : $${e^{AT}} = \

The minimal product-of-sums function described by the $$K$$-map given in Fig.

A dual-slope analog-to-digital converter uses an $$N$$-bit counter. When the input signal $${V_a}$$ is being integrated,

The counter shown in Fig. is initially in state $${Q_2} = 0,\,{Q_1} = 1,\,{Q_0} = 0.$$ With reference to the $$CLK$$ inp

Which one of the following is not a vected interrupt?

A voltage wafeform $$v\left( t \right) = 12\,{t^2}$$ is applied across a $$1$$ $$H$$ inductor for $$t \ge 0,$$ with ini

The circuit shown Fig. is equivalent to a load of

Predict the current $${\rm I}$$ in Fig. in response to a voltage of $$20\angle {0^0}\,V.$$ The impedance values are give

The impedance seen by the source in the circuit in Fig. is given by

If an $$ac$$ voltage wave is corrupted with an arbitrary number of harmonics, then the overall voltage waveform differs

A two-port device is defined by the following pair of equations: $${i_1} = 2{v_1} + {v_2}$$ and $${i_2} = {v_1} + {v_2}

The two wattmeter method is used to measure active power on a three phase, three wire system. If the phase voltage is un

A $$3$$ - $$\phi $$ load operates with balanced voltages applied to its terminals, and draws balanced currents. The pote

Instrument transformers are known to introduce magnitude and phase errors in measurements. These are primarily due to

A $$2300$$ $$V,$$ $$3$$-phase synchronous motor driving a pump is provided with a line ammeter and a field rheostat. Whe

Ratio of the rotor reactance X to the rotor resistance R for a two-phase servomotor

A 1.8° step, 4-phase stepper motor has a total of 40 teeth on 8 poles of stator. The number of rotor teeth for this moto

A 240 V dc series motor takes 40A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of res

A permanent magnet dc commutator motor has a no load speed of 6000 rpm when connected to a 120V dc supply. The armature

In a constant voltage transformer (CVT), the output voltage remains constant due to

If an ac voltage wave is corrupted with an arbitrary number of harmonics, then the overall voltage waveform differs from

A 3-phase delta/star transformer is supplied at 6000 V on the delta-connected side. The terminal voltage on the secondar

A three phase, wound rotor induction motor is to be operated with slip energy recovery in the constant torque mode, when

The power input to a 415 V, 50 Hz, 6 pole, 3-phase induction motor running at 975 rpm is 40 kW. The stator losses are 1k

A 3-phase, 4-pole squirrel cage induction motor has 36 stator and 28 rotor slots. The number of phases in the rotor is:

The phase sequence of a three-phase alternator will reverse if

A single-phase, 2000 V alternator has armature resistance and reactance of 0.8 ohms and 4.94 ohms respectively. The volt

The compensating winding in a dc machine

Show via the construction of a suitable Gaussian surface, that the capacitance of a spherical capacitor consisting of t

An electron with velocity $$'u'$$ is placed in an electric field, $$E$$ and magnetic field, $$B.$$ The force experienced

A current $${\rm I}$$ in the short conducting element shown in Fig. produces a flux density $${B_1}$$ at point $$1.$$ D

A thyristorised three phase fully controlled converter feeds a $$dc$$ load that draws a constant current. Then the input

A step down chopper operates from a $$dc$$ voltage source $${V_s}$$ feeds a $$dc$$ motor armature with a back $$e.m.f$$

A $$dc$$ motor with armature resistance $${R_a}$$ is fed from a step down chopper in the continuous mode, and operates a

Triangular $$PWM$$ control, when applied to a $$BJT$$ based three phase voltage source inverter, introduces.

A three phase voltage source inverter supplies a purely inductive three phase load. Upon Fourier analysis, the output vo

A single phase voltage source of magnitude $${V_s}$$ and frequency $$\omega \,\,\left( {rad\,/\,\sec } \right)$$ is conn

The incremental cost characteristic of two generators delivering $$200$$ $$MW$$ are as follows $$\,\,\,{{d{F_1}} \over

A transmission line has equal voltages at the two ends, maintained constant by two sources. A third source is to be prov

The corona loss on a particular system at 50 Hz is 1 kW/km per phase. The corona loss at 60 Hz would be

A $$275$$ $$kV,$$ $$3$$-phase, $$50$$ $$Hz,$$ $$400$$ $$km$$ lossless line has following parameters: $$x=0.05$$ $$ohms/k

A synchronous generator, having a reactance of 0.15 p.u., is connected to an infinite bus through two identical parallel

The severity of line-to-ground and three phase faults at the terminals of an unloaded synchronous generator is to be sam

For the configuration shown in figure, the breaker connecting a large system to bus $$2$$ is initially open. The system

In an inverse definite minimum time, electromagnetic type over-current relay, the minimum time feature is achieved becau

In a 3-step distance protection, the reach of the three zones of the relay at the beginning of the first line typically

The plug setting of a negative sequence relay is $$0.2$$ $$A.$$ The current transformer ratio is $$5:1$$. The minimum va

In a thermal power plant, the feed water coming to the economiser is heated using

Out of the considerations (i) to (iv) listed below, (i) No distance limitation related to steady state stability (ii) No