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Ece Viva Questions And Answers Pdf

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Electronics Engineering , like any other engineering job, has many technical questions. To shine better at electronics engineering interview, you need to have a strong grip over the technical questions. You need to keep yourself updated with e lectronics engineering interview questions to outperform other candidates.

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World Organizations. World Famous Personality. Worlds Honours and Awards. World Geography. Question No. Answer : Modulation is the process of varying some characteristic of a periodic wave with an external signal. Radio communication superimposes this information bearing signal onto a carrier signal. These high frequency carrier signals can be transmitted over the air easily and are capable of traveling long distances.

The characteristics amplitude, frequency, or phase of the carrier signal are varied in accordance with the information bearing signal. Modulation is utilized to send an information bearing signal over long distances. Answer : Amplifier is an electronic device or electrical circuit that is used to boost amplify the power, voltage or current of an applied signal. Answer : An inductor is a passive electrical device employed in electrical circuits for its property of inductance.

An inductor can take many forms. Answer : An operational amplifier, often called an op-amp, is a DC-coupled high-gain electronic voltage amplifier with differential inputs [1] and, usually, a single output. Typically the output of the op-amp is controlled either by negative feedback, which largely determines the magnitude of its output voltage gain, or by positive feedback, which facilitates regenerative gain and oscillation. Answer : Demodulation is the act of removing the modulation from an analog signal to get the original baseband signal back.

Demodulating is necessary because the receiver system receives a modulated signal with specific characteristics and it needs to turn it to baseband.

Answer : The equivalent circuit of all the components of the power system are drawn and they are interconnected is called impedance diagram. Answer : The components of power system may operate at different voltage and power levels.

It will be convenient for analysis of power system if the voltage, power, current ratings of the components of the power system is expressed with reference to a common value called base value. Answer :. AM -Amplitude modulation is a type of modulation where the amplitude of the carrier signal is varied in accordance with the information bearing signal. FM -Frequency modulation is a type of modulation where the frequency of the carrier signal is varied in accordance with the information bearing signal.

Answer : The study and use of electrical devices that operate by controlling the flow of electrons or other electrically charged particles is called Electronic. Answer : In electronics, a transistor is a semiconductor device commonly used to amplify or switch electronic signals.

The transistor is the fundamental building block of computers, and all other modern electronic devices. Some transistors are packaged individually but most are found in integrated circuits. Answer : Code division multiple access CDMA is a channel access method utilized by various radio communication technologies.

CDMA employs spread spectrum technology and a special coding scheme where each transmitter is assigned a code to allow multiple users to be multiplexed over the same physical channel. An analogy to the problem of multiple access is a room channel in which people wish to communicate with each other. To avoid confusion, people could take turns speaking time division , speak at different pitches frequency division , or speak in different directions spatial division.

In CDMA, they would speak different languages. People speaking the same language can understand each other, but not other people. Answer : The load flow study of a power system is essential to decide the best operation existing system and for planning the future expansion of the system. It is also essential for designing the power system. Answer : Much attention has been given by researchers to negative feedback processes, because negative feedback processes lead systems towards equilibrium states.

Positive feedback reinforces a given tendency of a system and can lead a system away from equilibrium states, possibly causing quite unexpected results.

Answer : Communication means transferring a signal from the transmitter which passes through a medium then the output is obtained at the receiver or communication says as transferring of message from one place to another place called communication. Answer : Pass band is the range of frequencies or wavelengths that can pass through a filter without being attenuated. This range corresponds to frequency of alternating current electrical signals used to produce and detect radio waves.

Since most of this range is beyond the vibration rate that most mechanical systems can respond to, RF usually refers to oscillations in electrical circuits or electromagnetic radiation. Answer : An instrumentation amplifier is a differential op-amp circuit providing high input impedances with ease of gain adjustment by varying a single resistor.

Answer : A semiconductor is a solid material that has electrical conductivity in between that of a conductor and that of an insulator An Insulator is a material that resists the flow of electric current. Answer : The process of obtaining a set of samples from a continuous function of time x t is referred to as sampling. Answer : Types of communications are Analog and digital communication. Analog communication: As a technology, analog is the process of taking an audio or video signal the human voice and translating it into electronic pulses.

Digital communication: Digital signals are immune to noise, quality of transmission and reception is good, components used in digital communication can be produced with high precision and power consumption is also very less when compared with analog signals. Answer : The generating system, transmission system, and distribution system.

Answer : Barkhausen criteria, without which you will not know which conditions, are to be satisfied for oscillations. This condition implies that. Answer : It states that, while taking the samples of a continuous signal, it has to be taken care that the sampling rate is equal to or greater than twice the cut off frequency and the minimum sampling rate is known as the Nyquist rate. Answer : 3 satellites are required to cover the entire earth, which is placed at degree to each other.

The life span of the satellite is about 15 years. Answer : Types of feedback are:. Negative feedback: This tends to reduce output but in amplifiers, stabilizes and linearizes operation. Positive feedback: This tends to increase output. In contrast, a system that responds to the perturbation in the opposite direction is called a negative feedback system.

Bipolar feedback: which can either increase or decrease output. AM is used for video signals for example TV. Ranges from to kHz. FM is used for audio signals for example Radio. Ranges from 88 to MHz.

400+ TOP ELECTRONICS and COMMUNICATION Engineering Questions & Answers PDF

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A list of top frequently asked Digital Electronics Interview Questions and answers are given below. The difference between latches and Flip-flop is that the latches are level triggered and flip-flops are edge triggered. In latches level triggered means that the output of the latches changes as we change the input and edge triggered means that control signal only changes its state when goes from low to high or high to low. The system which has a base 2 is known as the binary system and it consists of only two digits 0 and 1. In this consist of three bits, we start writing the numbers from the rightmost bit power as 0 then the second bit as power 1 and the last as power 2. So, we can represent a decimal number as. The complement of the sum of two numbers is equal to the product of the complement of two numbers.

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Basic Electronics Engineering Interview Questions & Answers

Ans: The study and use of electrical devices that operate by controlling the flow of electrons or other electrically charged particles. If the electronic device is plugged into a standard wall outlet, there will be a transformer inside which will convert the AC voltage you are supplying to the required DC voltage needed by the device. Examples: Computer, radio, T. V, etc

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What is Electronic? The study and use of electrical devices that operate by controlling the flow of electrons or other electrically charged particles. What is communication? Communication means transferring a signal from the transmitter which passes through a medium then the output is obtained at the receiver. Different types of communications?

Comprehensive viva questions for ece with answers, online learning electronic devices MCQs, competency based interview questions for online electronics engineering degree programs. MCQ : A constant parameter which is always equal to the frequency at which operational amplifier's open loop gain is unity is called. MCQ : Amount by which an electrical signal is increased or amplified is called. MCQ : Protective device that burns open when current exceeds the rated limit is called. MCQ : Value of anode current below which a device switches from forward conduction region to the forward blocking region is called. MCQ : Gain that occurs for the range of frequencies between the lower and upper critical frequencies is called.

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Digital Electronics Interview Questions

Define Rectifier? Rectifier is a Electronic circuit which converts Alternating signal into pulcating D. Define Full wave Rectifier? This rectifier consists of center rapped transformer and two diodes.

Коридор, выложенный кафельными плитками, довольно круто спускался вниз, и Сьюзан держалась за перила, стараясь не отставать. Воздух в помещении становился все прохладнее. Чем глубже под землю уходил коридор, тем уже он становился.

Она не произнесла ни слова. За десять лет их знакомства Стратмор выходил из себя всего несколько раз, и этого ни разу не произошло в разговоре с. В течение нескольких секунд ни он, ни она не произнесли ни слова. Наконец Стратмор откинулся на спинку стула, и Сьюзан поняла, что он постепенно успокаивается.

 Вы уверены, что в коробке все его вещи. - Да, конечно, - подтвердил лейтенант. Беккер постоял минуту, уперев руки в бока. Затем поднял коробку, поставил ее на стол и вытряхнул содержимое.

Basic Electronics Questions for Interview

 Че-че-го же вы хотите? - выдавил он заикаясь.  - Я ничего не знаю.


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