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#1
June 23rd, 2016, 12:54 PM
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 Previous Papers Of ECIL For Electronics   |
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#2
January 31st, 2018, 02:30 PM
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| Re: previous papers of ecil for electronics
Someone of you please provide me exam paper of Electronics and Electrical stream as I’m preparing for Electronics Corporation of India Limited?
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#3
January 31st, 2018, 02:32 PM
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| Re: previous papers of ecil for electronics
As you preparing for Electronics Corporation of India Limited here I will provide you, Electronics and Electrical stream exam paper so that you can solve it. Here is the exam paper 1. When a inductive coil connected to a 200 V, 50Hz ac supply with 10A current flowing through it dissipates 1000 watts then which of the following will have least value in ohms- a.) Resistance b.) Reactance c.) Impedance d.) None 2.Oscillator crystal are made of ? a.) Silicon b.) Germanium c.) Quartz d.) None 3. For small size, high frequency coils, the most common core material is- a. )Air b. )Ferrite c.) Powdered ion d.) Steel 4.If we have a parallel plate capacitor of plate area ?A? and plate separatoin t and having a capacity C and a metallic plate r of area A and of negligible thickness is introduced in thecapacitor at a distance from either of the two plates as shown in the given figure then the capacity of the capacitor will become ? a.) b.) C c.) 2C d.) 4C 5.A superconductor is a ? a.) A material showing perfect conductivity and Meissner effect below a critical temperature b.) A conductor having zero resistance c.) A perfect conductor with highest di-magnetic susceptibility d.) A perfect conductor which becomes resistance when the current density through it exceeds a critical value 6.When an inductor tunes at 200 KHz with 624 pF capacitor and at 600 KHz with 60.4 pF capacitor then the self capacitance of the inductor would be ? a) 8.05 pF b) 10.05pF c.) 16.01pF d.) 20.01pF 7.Sparking occur when a load is switched off because the circuit has high ? a.) Inductance b.) Capacitance c.) Resistance d.) None 8.Sparking between contacts can be reduced by inserting a ? a.) Resistance in the line b.) Capacitor in series with contacts c.) Capacitor in parallel with contacts d.) None 9.RF amplifier of an A.M. receiver is normally biased in ? a.) Class ?A? b.) Class ?b? c.) Class ?C? d.) None 10.The value of gate voltage for the operation of enhancement of only N channel MOSFET has to be ? a.) High positive b.) High negative c.) Low positive d.) Zero 11.The input gate current of a FET is ? a.) a few microamperes b.) negligibly small c.) a few milliamperes d.) a few amperes 12.In the following fig. with R = 30k, the value of current through 2 K resistor is ? a.) 25 mA b.) 40 mA c.) 25/16 mA d.) 10 mA 13.A step recovery diode ? a.) has on extremely short recovery time b.) conducts equally well in both directions c.) is mainly used as a harmonic generator d.) is an ideal rectifiers of high frequency signals 14.In order to get maximum undistorted output signal from CE amplifier with VCC 10V, the value of VCE (Q) should be approximately- a.) 0.1V b.) 5V c.) 10V d) V 15.In a FET the electrode, which corresponds to collector in bipolar transistor, is ? a.) source b.) drain c.) gate d.) none 16.The device which acts like an NPN and a PNP transistor connected base to base and emitter to collector is ? a.) Triac b.) UJT c.) Diac d.) SCR 17.A typical optical fibre has ? a.) High refractive index core and low refractive index cladding b.) Low refractive index core and high refractive index cladding c.) Both a and b d.) None 18.In the following figure circuit diagram of an op-amp based is shown. The ratio is equal to ? a.) 9 b.) 11 c.) 10 d.) 21 19.When a loud speaker is connected across the terminals A and B of the network shown in the fig. then its impedance to obtain maximum power dissipation in it will be ? a.) 3 ? j1 b.) 3 + j9 c.) 7.5 + j 2.5 d.) 7.5 ? j 2.5 20.In the lattice network, the value of R for the maximum power transfer to the load ? a.) 5 b.) 6.5 c.) 8 d.) 9 |
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