The Barkhausen criterion for an oscillator<n>A.Loop gain should be unity<n>B.Loop gain should be less than unity<n>C.The phase of a feedback signal with respect to input should be 0° or 360°<n>D.Both A and C[SEP]D
Potentiometer method of DC voltage measurement is more accurate than direct measurement using a voltmeter because<n>A.It loads the circuit moderately.<n>B.It loads the circuit to maximum extent.<n>C.It uses centre zero galvanometer instead of voltmeter.<n>D.It does not load the circuit at all.[SEP]D
Which of these sets of logic gates are designated as universal gates?<n>A.NOR, NAND.<n>B.XOR, NOR, NAND.<n>C.OR, NOT, AND.<n>D.NOR, NAND, XNOR.[SEP]A
A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is<n>A.30° to 150°.<n>B.30° to 180°.<n>C.60° to 120°.<n>D.60° to 180°.[SEP]A
A box which tells the effect of inputs on control sub system is known as<n>A.Data Box.<n>B.Logical box.<n>C.Decision box.<n>D.State box.[SEP]C
Two infinite parallel metal plates are charged with equal surface charge density of the same polarity. The electric field in the gap between the plates is<n>A.same as that produced by one plate.<n>B.double the field produced by one plate.<n>C.dependent on coordinates of field points.<n>D.zero.[SEP]D
The resistance in the circuit of the moving coil of a dynamometer wattmeter should be<n>A.Low.<n>B.Very low.<n>C.High.<n>D.Almost zero.[SEP]C
The following are the necessary requirements of an oscillator<n>A.Amplitude stability<n>B.Frequency stability<n>C.Power stability<n>D.Both A and B[SEP]D
The normal voltage used in directional heating is<n>A.1.5 KV.<n>B.15 KV.<n>C.33 KV.<n>D.66 KV.[SEP]A
LC oscillators are used for produce a waveform with frequency ranging from<n>A.1MHz to 500 MHz<n>B.100 KHz to 500 MHz<n>C.1 KHz to 1 MHz<n>D.1MHz to 100 GHz[SEP]A
A working diode must have<n>A.High resistance when forward or reverse biased<n>B.Low resistance when forward biased, while high resistance when reverse bias<n>C.High resistance when forward biased, while low resistance when reverse bias<n>D.Low resistance when forward or reverse biased[SEP]B
What is the name of the fluorescent material that gives red colour fluorescence?<n>A.Zinc silicate.<n>B.Calcium silicate.<n>C.Zinc sulphide.<n>D.Magnesium silicate.[SEP]D
How many bits are required to store one BCD digit ?<n>A.1<n>B.2<n>C.3<n>D.4[SEP]D
Commutator in DC generator is used for<n>A.collecting of current<n>B.reduce losses<n>C.increase efficiency<n>D.convert AC armature current in to DC[SEP]D
1 F is theoretically equal to<n>A.1 ohm of resistance<n>B.ratio of 1 V to 1 C<n>C.ratio of 1 C to 1 V<n>D.none of these[SEP]C
How many entries will be in the truth table of a 3 input NAND gate ?<n>A.3<n>B.6<n>C.8<n>D.9[SEP]C
In decimal number system what is MSD<n>A.First digit from left to right<n>B.First digit from right to left<n>C.Middle digit<n>D.Mean of all digits[SEP]A
In Digital Logic Designs, GAL is abbreviated as<n>A.General Advance Logic<n>B.General Array Logic<n>C.Generic Advance Logic<n>D.Generic Array Logic[SEP]D
Inintel 8085A microprocessor ALE signal is made high to<n>A.Enable the data bus to be used as low order address bus<n>B.To latch data D0-D7 from data bus<n>C.To disable data bus<n>D.To achieve all the functions listed above[SEP]A
For an SCR gate cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance?<n>A.111.9 ohm<n>B.11.19 ohm<n>C.108 ohm<n>D.115 ohm[SEP]A
The concept of V/f control of inverters driving induction motors resuls in<n>A.constant torque operation<n>B.speed reversal<n>C.reduced magnetic loss<n>D.hormonic elimination[SEP]A
The energy stored in the magnetic field in a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying a current at 10 amp, is<n>A.0.015 joule.<n>B.0.15 joule.<n>C.0.015 joule.<n>D.1.15 joule.[SEP]B
While operating on variable frequency supplies, the AC motor requires variable voltage in order to<n>A.protect the insulation.<n>B.avoid effect of saturation.<n>C.improve the capabilities of the inverter.<n>D.protect thyristor from dV / dt.[SEP]B
Which of the following windings are necessary in case of all dc machines?<n>A.closed winding<n>B.lap winding<n>C.wave winding<n>D.open type winding[SEP]A
Relaxation Voltage controlled oscillators are used to generate<n>A.Sinusoidal wave<n>B.Triangular wave<n>C.Sawtooth wave<n>D.Both B and C[SEP]D
The supply frequency usually employed for high frequency eddy current heating is<n>A.1 KHz.<n>B.5 KHz.<n>C.10 MHz.<n>D.10 KHz to 400 KHz.[SEP]D
In the toggle mode a JK flip-flop has<n>A.J = 0, K = 0.<n>B.J = 1, K = 1.<n>C.J = 0, K = 1.<n>D.J = 1, K = 0.[SEP]B
Electric drive is becoming more and more popular because<n>A.all of below.<n>B.it provide smooth and easy control.<n>C.it is cheaper in cost.<n>D.it is simple and reliable.[SEP]A
A step up chopper has input voltage 110 V and output voltage 150 V. The value of duty cycle is<n>A.0.32.<n>B.0.67.<n>C.0.45.<n>D.0.27.[SEP]B
A Binary number system has how many digits.<n>A.0<n>B.1<n>C.2<n>D.10[SEP]C
Lowest critical frequency is due to pole and it may be present at the origin or nearer to the origin, then the type of network is<n>A.LC.<n>B.RL.<n>C.RC.<n>D.Any of the above.[SEP]C
Advantages of open loop control system is/are<n>A.simple and economical.<n>B.accurate.<n>C.reliable.<n>D.all of the above.[SEP]A
The voltage induced in an inductor is represented as,<n>A.product of its inductance and current through it.<n>B.ratio of its inductance to current through it.<n>C.ratio of current through it to its inductance.<n>D.product of its inductance and rate of change of current through it.[SEP]D
If a Hexadecimal number needs to convert to binary. For each hexadecimal digit, there will be how many bits<n>A.1<n>B.2<n>C.4<n>D.8[SEP]C
Induction heating takes place in<n>A.conducting but non-magnetic materials.<n>B.conducting materials which may be either magnetic or non-magentic materials.<n>C.insulating materials.<n>D.conducting and magnetic materials.[SEP]B
In a lap winding dc machine number of conductors are 100 and number of parallel paths are 10. Find the average pitch<n>A.10<n>B.100<n>C.50<n>D.1[SEP]A
Magnetic flux has the unit of<n>A.Newton<n>B.Ampere turn<n>C.Weber<n>D.Tesla[SEP]C
In balanced bridge, if the positions of detector and source are interchanged, the bridge will still remain balanced. This can be explained from which theorem<n>A.Reciprocity theorem<n>B.Thevinin's theorem<n>C.Norton's theorem<n>D.Compensation theorem[SEP]A
A D-flip-flop is said to be transparent when<n>A.the output is LOW<n>B.the output is HIGH<n>C.the output follows clock<n>D.the output follow input[SEP]D
A Lissajous pattern on an oscilloscope has 5 horinzontal tangencies and 2 vertical tangencies. The frequency of horizontal input is 100 Hz. The frequency of the vertical will be<n>A.500 Hz.<n>B.250 Hz.<n>C.400 Hz.<n>D.625 Hz.[SEP]B
Speed control by variation of field flux results in<n>A.constant power drive.<n>B.constant torque drive.<n>C.variable power drive.<n>D.none of the above.[SEP]A
Which of the following memories uses one transistor and one capacitor as basic memory unit<n>A.SRAM<n>B.DRAM<n>C.Both SRAM and DRAM<n>D.None[SEP]B
What will be the number of lamps, each having 300 lumens, required to obtain an average illuminance of 50 lux on a 4m * 3m rectangular room?<n>A.2<n>B.4<n>C.5<n>D.6[SEP]A
The output of the system has an effect upon the input quantity, then the system is a<n>A.open loop control system.<n>B.closed loop control system.<n>C.either A or B.<n>D.none of the above.[SEP]B
A sinusoidal signal is analog signal, because<n>A.it can have a number of values between the negative and positive peaks<n>B.it is negative for one half cycle<n>C.it is positive for one half cycle<n>D.it has positive as well as negative values[SEP]A
FM stands for<n>A.frequent modulation.<n>B.frequency modulation.<n>C.frequency moderator.<n>D.frequent moderator.[SEP]B
Stack is also known as<n>A.FIFO memory<n>B.Flash memory<n>C.LIFO memory<n>D.LILO memory[SEP]C
In Ward-Leonard system, the lower limit of the speed imposed by<n>A.Field resistance.<n>B.Armature resistance.<n>C.Residual magnetism of the generator.<n>D.None of above.[SEP]C
Colpitts oscillator is also called as<n>A.Tank circuit oscillator<n>B.LC oscillator<n>C.Resonant circuit oscillator<n>D.All of the above[SEP]D
An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be<n>A.1500 A.<n>B.6000 A.<n>C.2121.32 A.<n>D.4242.64 A.[SEP]C
Both the ALU and control section of CPU employ which special purpose storage location?<n>A.Buffers<n>B.Decoders<n>C.Accumulators<n>D.Registers[SEP]C
Systematic errors are<n>A.environmental errors.<n>B.observational errors.<n>C.instrument errors.<n>D.all of the above.[SEP]D
Which of the following is/are the disadvantages of an open loop control system?<n>A.Inaccurate.<n>B.Unreliable.<n>C.both A and B.<n>D.none of the above.[SEP]C
A diode (p-n junction) when reverse biased act as<n>A.On Switch<n>B.Zener diode<n>C.Capacitor<n>D.Off Switch[SEP]D
Piezoelectric effect is carried out in<n>A.composite filter.<n>B.crystal filter.<n>C.m derived.<n>D.constant k prototype.[SEP]B
The resistivity of the conductor depends on<n>A.area of the conductor.<n>B.length of the conductor.<n>C.type of material.<n>D.none of these.[SEP]C
The smallest change in measured variable to which instrument will respond is<n>A.resolution.<n>B.accuracy.<n>C.precision.<n>D.sensitivity.[SEP]A
In electronic communications, "AM" stands for<n>A.Amp Modification<n>B.Amplitude Method<n>C.Amplitude Modulation<n>D.Ampere Method[SEP]C
Which system is also known as automatic control system?<n>A.Open loop control system<n>B.Closed loop control system<n>C.Either A or B<n>D.Nether A nor B[SEP]B
A combinational PLD with a fixed AND array and a programmable OR array is called a<n>A.PLD<n>B.PROM<n>C.PAL<n>D.PLA[SEP]B
A null type instrument as compared to a deflected type instrument has<n>A.a lower sensitivity.<n>B.a faster response.<n>C.a higher accuracy.<n>D.all of the above.[SEP]C
Length of the cable is doubled, its capacitance C will be<n>A.one-fourth.<n>B.one-half.<n>C.doubled.<n>D.unchanged.[SEP]C
Electrons in p-type material of a semi-conductor are called as<n>A.either minority carriers or majority carriers<n>B.minority carriers<n>C.majority carriers<n>D.valance carriers[SEP]B
________ is the most detrimental impurity in the magnetic materials<n>A.Carbon.<n>B.Sulphur.<n>C.Oxygen.<n>D.Nitrogen.[SEP]A
Voltage controlled oscillators are used commonly in<n>A.Pulse Modulators Frequency Modulators Phase Clocked loops<n>B.Frequency Modulators<n>C.Phase Clocked loops<n>D.All the above[SEP]D
Low frequency supply is necessary for direct core type induction furnaces because<n>A.With normal frequeny supply the electromagnetic forces causes severe stirring action in the molten metal.<n>B.Magnetic coupling between the primary and secondary circuit is poor.<n>C.Both A and B.<n>D.None of the above.[SEP]C
The moving coil-meters, damping is provided by<n>A.the aluminium frame of the coil.<n>B.the coil spring attached to the moving.<n>C.eddy current disk.<n>D.damping vane in the airtight chamber.[SEP]A
Which of the following is the analogous quantity for mass element in force-voltage analogy?<n>A.Resistance.<n>B.Inductance.<n>C.Capacitance.<n>D.All of the above.[SEP]B
A latch is ________ sensitive<n>A.both level and edge<n>B.edge<n>C.level<n>D.None[SEP]C
What is used to protect the SCR from over current ?<n>A.CB and fuse.<n>B.Heat sink.<n>C.Snubber circuit.<n>D.Voltage clamping device.[SEP]A
The errors mainly caused by human mistakes are<n>A.gross error.<n>B.instrumental error.<n>C.observational error.<n>D.systematic error.[SEP]A
Electrical analogous quantity for dash-pot in force-current analogy is<n>A.resistance.<n>B.conductance.<n>C.inductance.<n>D.capacitance.[SEP]B
Which lamp has the best Colour Rendering Index (CRI)?<n>A.LED<n>B.Fluorescent<n>C.Incandescent<n>D.High pressure sodium vapour[SEP]C
Power dissipation in ideal inductor is<n>A.Maximum<n>B.Minimum<n>C.Zero<n>D.A finite value[SEP]C
For intermittent work which of the following furnace is suitable?<n>A.Core less furnace.<n>B.Indirect arc furnace.<n>C.Either of above.<n>D.Nither of above.[SEP]B
In electrical resistance welding material of electrode should have<n>A.higher electrical conductivities.<n>B.higher thermal conductivities.<n>C.sufficient strength to sustain high pressure at elevated temperatures.<n>D.all of above.[SEP]D
Which of the following are the passive elements?<n>A.Resistor<n>B.Bulb<n>C.Both<n>D.None of these.[SEP]C
The main advantage of dielectric heating is that<n>A.heating occurs in the material itself.<n>B.heating occurs due to high frequency.<n>C.it can be used for drying the explosives.<n>D.None of the above.[SEP]A
Materials used in heat sink should have<n>A.high thermal conductivity.<n>B.large surface area.<n>C.high melting point.<n>D.All of these.[SEP]D
Conductor is static and the field is varying then emf will be induced. This principle is called<n>A.virtually induced emf.<n>B.dynamically induced emf.<n>C.static induced emf.<n>D.none of these[SEP]C
Four identical alternators each are rated for 20 MVA, 11 KV having a subtransient reactance of 16% are working in parallel. The short circuit level at the busbar is<n>A.500 MVA<n>B.400 MVA<n>C.125 MVA<n>D.100 MVA[SEP]A
According to the Bohr model, an electron gains or losses energy only by<n>A.moving faster or slower in an allowed orbit.<n>B.jumping from one allowed orbit to another.<n>C.being completely removed from an atom.<n>D.jumping from one atom to another atom.[SEP]B
A three-state buffer has the following output states<n>A.1, 0, float<n>B.High, Low, Float<n>C.Both A and B<n>D.Set, Reset, Halt[SEP]C
By using which of the following elements, mechanical translational systems are obtained?<n>A.mass element<n>B.spring element<n>C.dash-pot<n>D.all of the above[SEP]D
Four capacitors each of 40 µF are connected in parallel, the equivalent capacitance of the system will be<n>A.160 µF<n>B.10 µF<n>C.40 µF<n>D.5 µF[SEP]A
The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be<n>A.R Ω<n>B.2R Ω<n>C.4R Ω<n>D.8R Ω[SEP]C
A single phase full bridge inverter can operated in load commutation mode in case load consist of<n>A.RL.<n>B.RLC underdamped.<n>C.RLC overdamped.<n>D.RLC critically damped.[SEP]B
A microprocessor is ALU<n>A.and control unit on a single chip.<n>B.and memory on a single chip.<n>C.register unit and I/O device on a single chip.<n>D.register unit and control unit on a single chip.[SEP]D
To obtain a high value of capacitance, the permittivity of dielectric medium should be<n>A.low<n>B.zero<n>C.high<n>D.unity[SEP]C
Deflection method direct measurements are most widely used as these are<n>A.least time consuming.<n>B.most simple.<n>C.most simple and least time consuming.<n>D.most accurate.[SEP]C
Purely mechanical instrument cannot be used for dynamic measurements because they have<n>A.high inertia.<n>B.higher response time.<n>C.large time constant.<n>D.all of the above.[SEP]D
Advantages of higher transmission voltage is/are<n>A.Power transfer capability of the transmission line is increased<n>B.Transmission line losses are reduced<n>C.Area of cross section and volume of the conductor is reduced<n>D.all of the above[SEP]D
Under over voltage condition impedance offered by the voltage clamping device is<n>A.high.<n>B.low.<n>C.moderate.<n>D.infinity.[SEP]B
A long wire composed of a smooth round conductor runs above and parallel to the ground (assumed to be a large conducting plane). A high voltage exists between the conductor and the ground. The maximum electric stress occurs at<n>A.lower surface of the conductor.<n>B.upper surface of the conductor.<n>C.the ground surface.<n>D.midway between the conductor and ground.[SEP]A
In a dc machine 6 pole wave winding is used. The number of parallel paths are?<n>A.6<n>B.4<n>C.2<n>D.1[SEP]C
Which of the following is a digital device<n>A.Regulator of a fan<n>B.Microphone<n>C.Resistance of a material<n>D.Light switch[SEP]D
Instantaneous power in inductor is proportional to the<n>A.product of the instantaneous current and rate of change of current.<n>B.square of instantaneous current.<n>C.square of the rate of change of current.<n>D.temperature of the inductor.[SEP]A
Which of the following is a variable displacement transducer?<n>A.tachometer<n>B.potentiometer<n>C.synchros<n>D.none of the above[SEP]B
Five capacitors each of 5 µF are connected in series, the equivalent capacitance of the system will be<n>A.5 µF<n>B.25 µF<n>C.10 µF<n>D.1 µF[SEP]D
Susceptibility is negative for<n>A.non magnetic substances.<n>B.diamagnetic substances.<n>C.ferromagnetic substances.<n>D.none of above.[SEP]B
One of the following is the primary function of an oscillator<n>A.produces sinusoidal oscillations<n>B.generates non sinusoidal waveforms<n>C.generates sustained oscillations at a constant amplitude and specific frequency<n>D.none of the above[SEP]C
The metal surfaces for electrical resistance welding must be<n>A.rough.<n>B.clean.<n>C.moistened<n>D.coloured[SEP]B
The latching current of SCR is 20 mA. Its holding current will be<n>A.23 mA.<n>B.40 mA.<n>C.10 mA.<n>D.60 mA.[SEP]C
In force-current analogy, electrical analogous quantity for displacement (x) is<n>A.voltage.<n>B.inductance.<n>C.capacitance.<n>D.flux.[SEP]D
Feedback circuit in an oscillator can be accomplished by<n>A.Resistive coupling between input and output<n>B.Capacitive coupling between input and output<n>C.Inductive coupling between input and output<n>D.Any one or combinations of the above methods[SEP]D
Lowest critical frequency is due to zero and it may be present at the origin or nearer to the origin, then the type of network is<n>A.LC circuit.<n>B.RC circuit.<n>C.RLC circuit.<n>D.RL Circuit.[SEP]D
What is the value of dielectric constant of air?<n>A.Less than 1<n>B.0.<n>C.1.<n>D.none of these.[SEP]C
Temperature variation is a/an<n>A.Digital quantity<n>B.Analog quantity<n>C.Either Digital or Analog quantity<n>D.None[SEP]B
The illumination at a point 5 meters below a lamp in 6 lux. The candle power of the lamp is<n>A.30<n>B.140.<n>C.150.<n>D.200.[SEP]C
For a dc machine shunt resistance and armature resistance values are<n>A.high and high<n>B.high and low<n>C.low and low<n>D.low and high[SEP]B
The change of cross sectional area of conductor in magnetic field will affect<n>A.reluctance of conductor.<n>B.resistance of conductor.<n>C.(A) and (B) both in the same way.<n>D.none of above.[SEP]C
Which of the following is used in SCR to protect from high dV / dt?<n>A.Snubber circuit.<n>B.Fuse.<n>C.Equalizing circuit.<n>D.Circuit breaker.[SEP]A
What are the sets of commands in a program which are not translated into machine instructions during assembly process, called?<n>A.Mnemonics<n>B.Directives<n>C.Identifiers<n>D.Operands[SEP]B
Speed of data transmission in 4-G network of telecom is<n>A.386 kbps - 2 mbps.<n>B.2 mbps.<n>C.2 mbps – 1 gbps.<n>D.100 mbps - 1 gbps.[SEP]D
Which of the followings is/are active element?<n>A.Voltage source<n>B.Current source<n>C.Both<n>D.None of these.[SEP]C
Electrical analogous quantity for spring element (K) in force-voltage analogy is<n>A.L<n>B.R<n>C.1/C<n>D.C[SEP]C
A quartz crystal oscillator consists of<n>A.only series resonant frequency.<n>B.only parallel resonant frequency.<n>C.both series and parallel frequencies.<n>D.neither series nor parallel frequency.[SEP]C
Which of the following oscillators are used for low frequency (LF) applications<n>A.LC oscillators<n>B.RC oscillators<n>C.Both LC and RC Oscillators<n>D.None[SEP]B
The solid angle subtended by an area of 2400 cm^2 on the surface of a sphere of diameter 1.2 m is<n>A.3 / 2.<n>B.1 / 3.<n>C.2 / 3.<n>D.2 / 5.[SEP]C
Relative error is same as<n>A.ratio of absolute error and true value.<n>B.absolute error.<n>C.true error.<n>D.none of the above.[SEP]A
If holding current of a thyristor is 2 mA then latching current should be<n>A.0.01 A.<n>B.0.002 A.<n>C.0.009 A.<n>D.0.004 A.[SEP]D
In an intel 8085A, which is the first machine cycle of an instruction?<n>A.An op-code fetch cycle<n>B.A memory read cycle<n>C.A memory write cycle<n>D.An I/O read cycle[SEP]A
Which of the following are the disadvantages of a closed loop control system?<n>A.Reduces the overall gain.<n>B.Complex and costly.<n>C.Oscillatory response.<n>D.All of the above.[SEP]D
Poles and zeros are arranged alternatively on negative real axis, then type of network is/are<n>A.LC network.<n>B.RC network.<n>C.RL network.<n>D.Both 2 and 3.[SEP]D
The magnetisation and applied field in ferromagnetic materials are related<n>A.sinusoidally.<n>B.non linearly.<n>C.linearly.<n>D.parabolically.[SEP]B
Thin laminations are used in a machine in order to reduce<n>A.Eddy current losses<n>B.Hysteresis losses<n>C.Both A and B<n>D.Copper losses[SEP]A
A metal surface with 1 meter radius and surface charge density of 20 coulombs / m2 is enclosed in a 10 m side cube. The total outward electric displacement normal to the surface of the cube is<n>A.40π coulombs.<n>B.80π coulombs.<n>C.10π coulombs.<n>D.none of these.[SEP]B
In binary number system the first digit (bit) from right to left is called as<n>A.LSB, Least Significant Bit<n>B.MSB, Most Significant Bit<n>C.First Bit<n>D.Last Bit[SEP]A
In two wattmeter method of power measurement if the total power is measured by one wattmeter only then power factor of the system is<n>A.0.<n>B.0.5.<n>C.1.<n>D.none of above.[SEP]B
A 0 - 100 V voltmeter has a guaranteed accuracy of 2 % of full scale reading. The voltage measured by the voltmeter is 75 V. The limiting error is in percentage<n>A.3.33 %.<n>B.2.66 %.<n>C.2 %.<n>D.1 %.[SEP]B
Which of the following methods is/are used for reactive or voltage compensation<n>A.shunt capacitor<n>B.series capacitor<n>C.generation excitation control<n>D.all of the above[SEP]D
The ROM programmed during manufacturing process itself is called<n>A.MROM<n>B.PROM<n>C.EPROM<n>D.EEPROM[SEP]A
In 8085 name/names of the 16 bit registers is/are<n>A.stack pointer.<n>B.program counter.<n>C.both A and B.<n>D.none of these.[SEP]C
Stability of a transmission line can be increased by<n>A.shunt capacitor<n>B.series capacitor<n>C.shunt reactor<n>D.both A and B[SEP]D
Snubber circuit is used with SCR<n>A.in series.<n>B.in parallel.<n>C.either series or parallel.<n>D.anti parallel.[SEP]B
The number of rings in the Bohr model of any element is determined by what?<n>A.Column number on periodic table.<n>B.Atomic mass.<n>C.Row number on periodic table.<n>D.Atomic number.[SEP]C
Silicon and Germanium are ________ elements.<n>A.trivalant<n>B.pentavalant<n>C.hexavalant<n>D.tetravalant[SEP]D
The number of output pins in 8085 microprocessors are<n>A.27.<n>B.40.<n>C.21.<n>D.19.[SEP]A
If P is the power of a star connected system then what will be power of an equivalent delta connected system?<n>A.P<n>B.3P<n>C.P/3<n>D.None of the above[SEP]A
Which oscillators are easy to fabricate in a monolithic IC?<n>A.Crystal oscillator.<n>B.Hartley oscillator.<n>C.Wien bridge oscillator.<n>D.Relaxation oscillator.[SEP]D
If all the elements in a particular network are linear, then the superposition theorem would hold, when the excitation is<n>A.DC only<n>B.AC only<n>C.Either AC or DC<n>D.An Impulse[SEP]C
The feedback factor of a Wien bridge oscillator using Op-Amp is<n>A.1/3<n>B.1/4<n>C.1/2<n>D.1[SEP]C
The length of bus cycle in 8086/8088 is four clock cycles, T1, T2, T3, T4 and an indeterminate number of wait state clock cycles denoted by Tw. The wait states are always inserted between<n>A.T1 & T2<n>B.T2 & T3<n>C.T3 & T4<n>D.T4 & T1[SEP]C
Which of the following is not a sinusoidal oscillator?<n>A.LC oscillator<n>B.RC phase shift oscillator<n>C.Relaxation oscillator<n>D.Crystal oscillator[SEP]C
A wire carrying current is bent in the form of a circular loop. Then the magnetic field around each portion of the wire will be<n>A.parallel to the plane of the wire.<n>B.perpendicular to the circumference of the wire.<n>C.parallel to half portion and perpendicular for the other half.<n>D.none of above.[SEP]A