Explanation: CA3086 play a significant role in proper execution or operation of the circuit during the construction of mirror circuit. The resistance value decreases with an increase in the intensity of incident light & hence the typical value of resistance of photo-conductive cells is absolutely 100 ohm. In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: â¦ MCQ Heating MCQ Highway Engineering MCQ HMT MCQ Hydraulic M/c MCQ Hydrology MCQ IC Engines MCQ Induction MCQ Induction Motors MCQ Inductors MCQ Industrial Drives MCQ Industrial Engg MCQ Instrumentation MCQ Irrigation Engg MCQ Language Processors MCQ Linux MCQ â¦ However, this type of transistor array ultimately leads to acquire the thermal stability and the requisite amount of collector current in a current mirror circuit.Due to simplicity in fabrication and operation, current mirror circuit have wide range of applications in the aspects of differential and operational amplifiers. 33k Ω As we know that Rf should be equal to 0.586 x R1, then R1 = 27k Ω)Thus, Rf = 0.586 x 27 = 15.86k Ω By taking into consideration the pot value of about 20k Ω, estimated resistances are R2 = R3 = 33k Ω C2 = C3 = 0.0047μ F R1 = 27k Ω & Rf = 15.8k Ω Step 4 : Since the values of resistors and capacitors are equal , the passband voltage gain must be equal to Af = 1 + (Rf / R1) 1.586However, the gain must satisfy the Butterworth response & hence, the value of R1 must be selected = 100k Ω in order to estimate the value of Rf. In case of non-inverting amplifier, the input is applied to non-inverting input terminal & inverting terminal is set to be grounded while in case of inverting amplifier, the input is applied to inverting terminal & non-inverting terminal is at ground level. Generally, there are mainly two types of strain gauges like wired strain gauge & semiconductor strain gauge. The op-amp can be corrected easily to compensate for temperature changes. More the level of sensitivity, high will be the rate of accuracy & resolution. However, all these mechanisms are adopted as per the requirement of desired application of switching regulator. However, response & conversion time are not the valid specifications for DAC selection since they are of significant importance in ADC. But, it exhibits adverse consequences in the reduction of an output voltage when exceeded to greater extent. This entire functionality is undertaken by Voltage -Controlled Oscillator (VCO). Q.183.For IC 741 typical value of input offset current isâââââ- ... ELECTROMAGNETIC FIELD THEORY 69 IMPORTANT EXPECTED MCQ â¦ Explanation: Typical electrical parameters of comparator include positive & negative output levels, strobe current & strobe release time, response time & saturation voltage. The transient response affects the settling time while slew rate give rise to distortion if exceeded. Explanation: Op-amp ICs varying in the version of 741 are highly approved or sanctioned for military grade since the temperature range lies within -55° to 125°C. Determine the values of load current and output voltage respectively for the below schematic of â¦ Some of the general characteristics of the IC version are : â High gain, on the order of a million â High input imp â¦ 1. Powdered permalloy toroids possess are highly permeable with lower values of leakage inductance & losses. The significant advantage of hysteresis is that it increases the speed of operation of the comparator. Prerequisite: Know the theory about the experiment. Hence, it is also regarded as 'Second-generation Op-amp'. Output of Delay Equalizers can be generated by using Super-position theorem. Voltage Controllers & capacitors are not meant for controlling the amount of offset output voltage in Op-amps. It is possible to control the current in the heat-generating circuit with an assistance of relay driven by the temperature controller itself. Narrow band-reject filter is commonly known as notch filter since it has high quality factor (Q>10) & bandwidth is very much smaller as compared to that of wide band-reject filters. Determine the output from the following circuit a) 180 o in phase with input â¦ All these major shortcomings were tackled by an internally compensated op-amp IC741 which had a provision of short-circuit protection, absence of latch-up problem & highly stable & proficient at the operational level. Since bandwidth is a small signal phenomenon, it represents the band of frequencies for which the gain remains constant & also highly dependable on compensating components including closed loop gain. This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on âIdeal Operational Amplifierâ. A typical summing amplifier with three input voltages V 1, V 2 and V 3 three input resistors R 1, R 2, R 3 and a feedback resistor R f.; The following analysis is carried out assuming that the op-amp is an ideal â¦ Which among the following is a military grade op-amp IC? Explanation: Microprocessor interfacing is an application of ADCs while all the remaining applications like microcomputer interfacing, programmable power supply & CRT graphics are the applications concerned to digital to analog converters in accordance to their functionalities. It was first manufactured by Fairchild semiconductors in the year 1963. When Vin Vref, then reference voltage is higher at the negative input as compared to that of the positive input. Capacitor discharge interval in monostable circuits is known as (a) refresh time (b) recovery time (c) dynamic time (d) static time Q3. ANSWER: IC 741. Electronic Engineering (MCQ) questions & answers. The evaluation of the test taken by a candidate will be provided on line after submission of the answer of last question.Duration of The Test- 18 minutes**Note- This test is available only to authorized users.This MCQ is created bySatyajit's ClassesMr. The most probabilistic approach of hysteresis occurrence can be observed in the comparators with positive (or regenerative) feedback. Another name of VCO is Voltage to frequency converter.For e.g. This is MCQ Test with 12 Questions. 15. The op amp IC we are going to discuss about here is IC 741. Frequency Scaling is most oftenly performed whenever there is a necessity to change the cut-off frequencies in filter designing process. In this section of Electronic Devices and Circuits.It contain Operational Amplifiers (OP AMPS) MCQs (Multiple Choice Questions Answers).All the MCQs (Multiple Choice Question Answers) requires in depth reading of Electronic Devices and Circuits Subject as the hardness level of MCQs â¦ All the mentioned parameters tend to infinity except output voltage & resistance so that it becomes feasible for an output to drive infinite number of other devices. Harikesh Yadav May 30, 2017 ECE MCQ PDF, General. Intuitively, sensitivity measures the degree of accuracy & resolution. Higher the value of quality factor, more is the selectivity of the filter. Here, the diode gets formed with an assistance of transistors placed adjacently. Objective: To study the working of op-amp â¦ Signetics NE/SE 566 VCO generates the triangular as well as square wave outputs simultaneously as a function of an input voltage. Consequently, some chips have been getting expensive due to students relying too much on one model and manufacturer. Educational Learning Point having all the articles of multiple subjects/area e.g; Computer Science, Medical, General Knowledge, Law, English, Islamic studies and Others. So, as the temperature level range display variations, the op-amp IC741 are further sub-categorized under the series of 741C, 741A & 741E & so on. 14. The 741 â¦ ANSWER: Adjusted Output from signal amplifier is directly proportional to the measured quantity. When signals undergo transmission by telephone wires, there is a definite change in phase. All Rights Reserved. Explanation: Inverting amplifiers are generally categorized in the form of summing amplifier, Scaling amplifier and averaging amplifier. This figure of merit conveys that if 'Q' > 10, the filter is considered to be a narrow band-pass filter whereas if 'Q' < 10, then the filter is considered as a narrow band-pass filter. It is an 8 pin IC. Apart from these versions, IC 555 are widely applicable in timers, oscillators & pulse generators. Explanation: Given data:Voltage Peak Value = 7mVFrequency = f = 1KHzR = 1500K Ω C = 2μF = 2 x 10-6 FAn input voltage equation of a differentiator circuit can be expressed by, V1 = Asin2 πft= 7 sin2π x 1000 t= 7 sin2000π t mVScale Factor = -CR = - [2 x 10-6 x 15 x 105] = - [30 x 10-1 ] = -3Hence, the output voltage of differentiator circuit can be evaluated as:Vo = -3 d / dt [7 sin 2000 π t]= -3 x 7 x 2000 cos 2000 π t= -42000 π cos 2000 π t mV. Multiple Choice Questions and Answers By Sasmita January 9, 2020 Multiple Choice Questions and Answers on Op-Amp ( Operational Amplifier ) In addition to reading the questions and â¦ ELECTRONICS IMPORTANT MCQ PDF 6 FOR BEL PROBATIONARY ENGINEERS EXAM 2017. Explanation: The thermal drift phenomenon of voltage & current are taken into consideration in accordance to the values of input offset voltage, input bias current & input offset current. These objective type questions are very important for competitive exams like IIT-JEE, GATE, CAT etc. On the contrary, the output voltage of inverting Op-amp goes out of phase in correspondence to input signal by an angle of 180° or in terms of opposite polarity. Explanation: Generation of clipping circuit using op-amp & rectifier diode is possible where the op-amp act as a voltage follower with diode in a feedback path. Q.182.For IC 741 typical value of input bias current isâââââ-(a) 10Î¼A (b) 80nA (c) 1mA (d) 30mA. The Following Section consists of Multiple Choice Questions on Basic Op-Amp Circuits. Explanation: Open loop configuration of Op-amp may increase the threat of distortion as well as clipping of output signal. Only the scaling or (weighted amplifiers) possesses this characteristic of operation that exhibits different weightages at the output. Therefore, the voltage difference 'Vref' must be smaller than input voltage. Thus, all pass filters are the means for compensating these phase changes, because of which they are generally termed as âPhase-Correctorsâ or âDelay Equalizersâ. Explanation: Frequency Scaling is a process of conversion of original cut-off frequency to a new cut-off frequency. The Barkhausen criterion for an oscillator. ANSWER: Unit change in R per unit change in 'l'. There are many 741 compatible chips readily obtainable; however, the problem is that many students and colleges are not aware of the different manufacturers and the model numbers. These short solved questions â¦ Semiconductor strain gauges are sensitive to maximum extent as compared to that of wire type & hence they yield more accuracy and resolution. Besides these, 741S & 741SC are recommended for military as well as commercial aspects due to high slew rate. Explanation: Structural Configuration of a differential amplifier is semantic to wheatstone bridge since the amplification is done between two input signals in exactly similar way just like the outputs of Wheatstone bridge network. High level signal does not need to get amplify & therefore, instrumentation amplifiers are targeted to amplify low level signals semantically where there is necessity of low noise, low thermal & time drifts, high input resistance & precise closed-loop gain. 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