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BSNL Electronics Communications Interview Questions
Questions Answers Views Company eMail

Oscillator crystal are made of a.) Silicon b.) Germanium c.) Quartz d.) None

5 13223

For small size, high frequency coils, the most common core material is- a. )Air b. )Ferrite c.) Powdered ion d.) Steel

11 19730

. 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 the capacitor 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

3 6775

. 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

1 5831

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

3 9209

Sparking occur when a load is switched off because the circuit has high a.) Inductance b.) Capacitance c.) Resistance d.) None

14 39876

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

4 15152

RF amplifier of an A.M. receiver is normally biased in a.) Class 'A' b.) Class 'b' c.) Class 'C' d.) None

5 15817

The Entropy of the source is maximum when the symbols are...................?

1533

Any idea of BSNL, JTO paper?

1598

modern capacitors which have high capacitance in small size use a dielectric of?

4 8923

the maximum spectral response of the germanium and silicon is in the ?

3 9449

6dB pad introduces how much attenuation?

3 9595

What is the most common modulation system is used for telegraphy?

6 17198

IS THERE ANY COADING PRESENT IN EPBX SYSTEM? IF YES THEN HOW WE CAN INSTALL IT?

1 3007

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