Electronics Engineering Interview Questions

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Silicon Controlled Rectifier

What is the another name of SCR?

parthiban s

• Apr 18th, 2017

Thyresistor & jFET, mosFET are thyresistor family

Deba Pratim Borah

• Mar 15th, 2017

Thyristor

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Race Around Condition

What is Race Around Condition in a JK FlipFlop? How it can be avoided?

Pulkit Aggarwal

• Apr 14th, 2017

When J=K=1 and Q=0 and clock input is applied after a time interval ðºt equal to propagation delay, output Q=1. Now, we have J=K=Q=1 and after another time interval ðºt output changes back to Q=0...

Pooja poddar

• Oct 24th, 2016

When the input to JK flip-flop is j=1 and k=1 it is called race around condition
Two ways to avoid it are
1) Masters key
2) Use edge triggered JK flip flop

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What is a sequential circuit and What is a combinational circuit?Is there any difference between them? If yes what is it?

• Sep 11th, 2007

Combinational circuit are those whose output depends only upon the present inputs but in sequential circuit the output depends upon both present and past inputs. that is the difference.Â

Saleem

• Apr 13th, 2017

Actually, Combinational circuits are made from logic gates and its output depends on the present input. combining combinational ckts we can make, multiplexer, demux, encoder, decoder, adders etc Howe...

shruthi

• Sep 15th, 2016

Examples of sequential circuits are latches (which latch or store the previous value) flipflops, counters, shift registers etc,. and examples of combinational circuits are decoders, encoders, multiplexers, demultiplexers, adders, comparators, substractors etc,.

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What is meant by filter? What are the different types of filters?

The output of the rectifier pulsating in nature, it consists of a desired DC component of voltage and unwanted ripple components. These ripple components are removed by placing filter circuit at the output of the rectifier.Types of filters: 1. capacitor filter 2. series inductor filter 3. LC filters of following two types (a)capacitance input filter (b)inductance unput...

rajesh

• Apr 7th, 2017

Filter is a device used to pass the required frequencies and eliminates the unwanted frequencies. Basically 2 types Filters 1. Active Filters (uses BJTS, FETS ,OP-amps) 2. Passive Filters (uses R,L,C ...

Prem kumar mendem

• Mar 17th, 2017

Filter is simply known as removing all noise or unwanted signal in the circuit

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TAMILMARAN C

• Apr 3rd, 2017

Simulator - It could simulate all the functional for the desire system

Emulator - It could replicate the entire system, Although we could use as another as similar system preferable.

Anonymous

• Aug 5th, 2014

In my opinion, I think, Simulator is the machine which the function is same as Remote Tools that is to manage, views, or upgrading the system or the performance(s). Emulator is a machine that shows...

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Java Implementation Drive

Which of these drivers have their implementation in Java
a) .Net protocol
b) JDBC-ODBC driver
c) Native-API driver
d) Native protocol

Anuj Garg

• Mar 22nd, 2017

JDBC-ODBC driver

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3 Phase AC Supply

Why 440volts instead of 660volts in 3 phases of supply system?

Sankareshwaran V

• Mar 13th, 2017

Their should always be a return conductor to close the circuit, so in 3phase one of the phase act as a return conductor.

uddhav kumbhar

• Nov 12th, 2016

Voltage measured by two point this is basic angle is not taken or in phase voltage resultant voltage is 0, so take angle between two phases.

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What is Biasing?

• Jul 6th, 2006

Biasing means applying the DC voltage across the device for its correct operation.

Santosh singh

• Mar 3rd, 2017

Biasing means applying the DC voltage across the device for its correct operation

Mohit

• Sep 15th, 2016

Is it necessary that voltage applied should be D.C.

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Abiy

• Jan 21st, 2017

Simply, operational amplifier the two input node voltages tend to have same value. If we connect feedback resistance to inverting op amp and connect non-inverting to the ground (Earth Ground) then the...

Rohan Gupta

• Dec 22nd, 2016

The concept of the virtual ground rises from the fact that the input voltage at the inverting terminal of Op. Am. is forced to such a small value that, for all practical purposes it may be assumed to ...

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How many types of non- voice jobs are there, and which one is better?

I am Prasad completed Engg in electronics. I want to know types of non- voice process and in terms of carrier which one is better voice or non voice ?

Lokesh

• Jan 19th, 2017

In voice process you may improve your communication skill and interpersonal skill.

mahesh

• Mar 27th, 2012

If u have a good fluency in English you can go for voice otherwise ...

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Germanium and Silicon Resistivity

When a sample of germanium and silicon having same impurity density are kept at room temperature then Resistivity of silicon will be higher than that of germanium, Why?

vicky

• Jan 8th, 2017

Si-50*10^3ohm-cm and ge-50ohm-cm

vmshankar20

• Apr 30th, 2009

The answer is simple. Consider the PN diode for Ge 0.3eV is the breakdown voltage and in the case of Si its 0.7eV since the impurities are added in the same amount the bond due to the other atoms of the Si makes it resistive compared to the Ge.. thats all!

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ROM and RAM cards

Which of the following is is used to hold ROM and RAM cards 1. Computer Bus 2. Expansion cards 3. Mother Board 4. Cache memory

sathya.R

• Dec 25th, 2016

Mother board

vikram

• Apr 22nd, 2016

3. Mother Board

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uddhav kumbhar

• Nov 12th, 2016

Decoder/buffer integrated circuit

Christy

• Mar 9th, 2015

The 74LS244 is a driver used for address bus.These buffers/line drivers are designed to improve both the performance and PC board density of 3-STATE buffers/ drivers employed as memory-address drivers, clock drivers, and bus-oriented transmitters/receivers

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Diode Connected BJT

Can we replace diode connected BJT with diode in current mirror circuit? Will that work in the same way or not?

bichi

• Nov 9th, 2016

No it will not work as like

Nihal

• Sep 14th, 2016

I could not understand question, but I think the question is related to BJT has p-n-p or n-p-n band if you take two diodes, each it has n(-ve) side and p(+ve) side. so now, by using two diodes you wi...

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Rating of Relay to Operate Water Pump

What is the rating of relay to operate water pump? Is the relay, current controlled or voltage controlled device?

Mayur

• Oct 13th, 2016

Realay is current controlled device.
Rating of relay is depending upon motor which is used in pump, supply 1/3 phase.

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Operation of Transistor

Assume we have biased a transistor at the point Icq=5ma, Vceq=5v. We have base pin resistor and collector pin resistor and the emitter is connected to Vcc=10v. Assume two steps:

1. In this situation we disconnect the collector pin. How we can calculate the value of base and emitter currents? I know this value is small.

2. If again we connect the collector pin to load resistor,the...

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Current Control Device and Voltage Control Device

What is the concept of Current Control Device and Voltage Control Device? How the operating takes place?

Keshav Patil

• Jun 30th, 2016

For example BJT you might know that in BJT collector current is beta (current gain of CE) times the base current. Keans in active region output means collector current depends on base current only so ...

berule pankaj

• Sep 16th, 2015

Best example of current controlled device is BJT. BJT is controlled by IB, IC, IE... Yes there is need of voltage source for current but actually the current flowing determines the O/P voltage... If ...

•

Nivetha

• Jun 20th, 2016

BJT is a current controlled device, where Ib used to drive the BJT either ON or OFF, a MOSFET is a voltage controlled device, the gate voltage used to control the switching activity.

Harshitha P K

• May 7th, 2016

BJT is a current controlled device, where the base current (Ib) is used to drive the BJT either ON or OFF, whereas, a MOSFET is a voltage controlled device, the gate voltage is used to control the switching activities.

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