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Draw energy level diagram of conductor and insulator.

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Electric locomotive has the highest operational availability.

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Availability factor

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Which of the following connection of transformers will give highest value of secondary voltage ? (A) Delta primary delta secondary (B) Delta primary star secondary (C) Star primary star secondary (D) Star primary delta secondary

asked May 8, 2018 in Electrical Engineering by Shimroz123
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The device which allows reverse power flow and withstands highest switch frequency is (A) GTO (B) MOSFET (C) IGBT (D) Inverter grade SCR

asked Apr 28, 2018 in Power Electronics by Shimroz123
1 answer 13 views

The effect of a finite gain of an operational amplifier used in an integrator is that (A) it would not integrate (B) the slope of the output will vary with time (C) the final value of the output voltage will reduce (D) there will be instability in the circuit

asked Apr 26, 2018 in Electronics Engineering by Shimroz123
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What is the use of operational amplifiers?

asked Mar 10, 2018 in Analog electronics circuits by Quiz
0 answers 16 views

What is the meaning of operational amplifier?

asked Mar 10, 2018 in Analog electronics circuits by Quiz
1 answer 21 views

The ADC having highest conversion speed is (A) Dual-slope ADC (B) Successive approximation ADC (C) Flash ADC (D) Servo ADC

asked Apr 28, 2018 in Digital Instrumentation by Shimroz123
0 answers 22 views

How does an operational amplifier work?

asked Mar 10, 2018 in Analog electronics circuits by Quiz
1 answer 98 views

How does electric locomotive work?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
0 answers 13 views

Is a train a locomotive?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
0 answers 22 views

What is locomotive force?

asked Mar 11, 2018 in Utilization of electrical energy by Quiz
1 answer 41 views

Which one of the following logic circuit has the highest speed as compared to the currently available logic circuits? A) Resistance-transistor logic B) Emitter-coupled logic C) Integrated-injection logic D) Diode-transistor logic 

asked Jun 17, 2018 in Digital Electronics by Shimroz123
1 answer 49 views

Which of the following ADC has highest accuracy ?  (a) Successive approximation type (b) Flash or parallel type (c) Single slope integration type (d) Dual slope integration type

asked Apr 23, 2018 in Electrical Engineering by Shimroz123
0 answers 27 views

For a stepper motor which of the following torque has the highest numerical value ? (A) Detent torque (B) Pull -in torque (C) Pullout torque (D) Holding torque

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
2 answers 16 views

The topology which has highest reliability is  A) Bus topology B) Star topology C) Ring topology D) Mesh topology

asked Apr 11, 2018 in Computer Engineering by Shimroz123
0 answers 13 views

Which of the following has the highest skin depth?  A) Aluminum B) Gold C) Silver D) Copper

asked Apr 9, 2018 in Electrical Engineering by Shimroz123
1 answer 13 views

 In which of the following power plants the availability of power is least reliable? A) Solar power plant B) Wind energy C) Tidal power plant D) Geothermal power plant

asked Jun 17, 2018 in Electrical Engineering by Shimroz123
1 answer 21 views

A system has 14 poles and 2 zeros in its open -loop transfer function. The slope of its highest frequency asymptote in its magnitude plot is (a) - 40 dB/dec (b) - 240 dB/dec (c) + 40 dB/dec (d) + 240 dB/dec

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
0 answers 17 views

One of the following Memories has the highest speed in terms of data transfer to and from the processor.  (1) Cache Memory (2) Primary Memory (3) Secondary Memory (4) External memory

asked Apr 10, 2018 in Computer Engineering by Shimroz123
1 answer 16 views

As compared to shunt and compound motors, series motor has the highest torque because of its comparatively .......... at the start.

asked Mar 26, 2018 in DC motor by Shimroz123
1 answer 11 views

An operational amplifier has an open loop gain of 200,000. Its output exhibits saturation at 10V. The threshold differential voltage of the amplifier is  A) 25 micro-volt B) 50 micro-volt C) 5 Volts D) 10 volts

asked May 20, 2018 in Amplifier by Shimroz123
0 answers 22 views

Compared to MOSFET operational amplifier, BJT operational amplifier has  A) Higher input resistance B) Higher slew rate C) Lower input current D) Higher voltage gain

asked Apr 5, 2018 in Electronics Engineering by Shimroz123
1 answer 18 views

 Highest flux density exists inside which of the following instruments? A) Electrodynamic instruments B) Hot wire instruments C) Moving iron instruments D) Moving coil instruments

asked Jun 4, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 12 views

Which material is having highest resistivity in ohm-metre at 20oC X10-8? A. Mercury B. Iron C. Tungsten D. Silver

asked Apr 12, 2018 in Electrical Engineering by Shimroz123
1 answer 12 views

Which amplifier will be preferred for highest gain?  (1) Darlington pair (2) Cascade amplifier (3) Cascode amplifier (4) Depends on the circuitry

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 12 views

The ideal operational amplifier does not have: (1) Infinite input resistance (2) Infinite output resistance (3) Infinite voltage gain (4) Infinite bandwidth 

asked May 29, 2018 in Amplifier by Shimroz123
1 answer 15 views

What is the importance of negative feedback in the operational amplifier? (A) It maintains the gain (B) The voltage difference between the input terminals is maintained at a very small value (C) The voltage difference between the input terminals is maintained at a constant value (D) The voltage difference between the input terminals is maintained at a very high value

asked May 12, 2018 in Amplifier by Shimroz123
1 answer 11 views

In the ideal closed loop operational amplifier, the gain depends on (A) value of the series component (B) value of the feedback component (C) on the operational amplifier itself (D) both A and B

asked May 12, 2018 in Electronics communication by Shimroz123
0 answers 14 views

The type number CA3741 operational amplifier(op-amp) is manufactured by  A) RCA B) Texas instruments C) Signetics D) Motorola

asked Apr 5, 2018 in Electronics Engineering by Shimroz123
1 answer 27 views

Draw a neat labelled block diagram of AC electric locomotive. State the function of each part.

asked Oct 12, 2018 in Industry Electrical Systems-II by Shimroz123
1 answer 4 views

Explain the need of maintenance of electric locomotive. 

asked Sep 12, 2018 by Shimroz123
1 answer 8 views

State the function of following auxiliaries used in electric locomotive, i) Batteries ii ) Compressor iii ) Blower iv ) Exhauster 

asked Sep 2, 2018 by Shimroz123
1 answer 11 views

State the function of a contactor in a power circuit of locomotive. List different types of it and state one application of each.

asked Sep 2, 2018 by Shimroz123
0 answers 10 views

The voltage collected by the pantograph of electric locomotive is (A) DC voltage (B) single-phase AC, 50 Hz (C) 3-phase AC, 50 Hz (D) single-phase AC, 25 Hz 

asked Jun 4, 2018 in Electrical Machine by Shimroz123
1 answer 10 views

Which of the following motor has squirrel cage winding on the stator: (1) 3 phase squirrel cage induction motor (2) Single phase squirrel cage pump motor (3) Single phase ceiling fan induction motor (4) Single phase table fan induction motor 

asked May 29, 2018 in Electrical Engineering by Shimroz123
0 answers 21 views

A material has conductivity of 10–2 mho/m and relative permittivity of 4. The frequency at which the conduction current in the medium is equal to the displacement current, is (a) 450 MHz (b) 900 MHz (c) 45 MHz (d) 90 MHz

asked May 25, 2018 in Physics by Shimroz123
1 answer 11 views

A certain SRAM has CS=0, WE=0 and OE=1. In which the following mode, this SRAM is operating: a) Read b) Write c) Stand By d) None of the above

asked May 23, 2018 in Computer Engineering by Shimroz123
1 answer 101 views

The loop transfer of a system is G(s) H(s) = 5/(s+1) (2s+1)(3s+1) which has the phase crossover frequency fc = 0.16 Hz. The gain margin (dB) of the system is  (a) 6 (b) 4 (c) 2 (d) 0

asked May 15, 2018 in Control System by Shimroz123
1 answer 18 views

Which of the following amplifier has the least distortion. • Class E • Class D • Class C • Class A

asked May 14, 2018 in Amplifier by Shimroz123
1 answer 8 views

The transformer connection which has gained considerable popularity to serve 3-phase equipment and single phase lighting load is • Star/Star • Delta/Delta • Delta/Star • Star/Delta

asked May 13, 2018 in Electronics Engineering by Shimroz123
1 answer 14 views

Which of the following has got a positive susceptibility  1.Diamagnetic 2.Paramagnetic 3.Ferromagnetic 4.both Paramagnetic & ferromagnetic 

asked May 13, 2018 in Electrical Engineering by Shimroz123

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