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MCQOPTIONS
This section includes 9294 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 5801. |
Assertion (A): Tristate logic is used for bus oriented systems Reason (R): The outputs of a tristate logic are 0, 1 and indeterminant. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is true, R is false |
| D. | A is false, R is true |
| Answer» D. A is false, R is true | |
| 5802. |
For a series R-L-C circuit, the characteristic equation is given as If is denoted by a and by , then under the condition of 2 > a2, the system will be |
| A. | critically damped |
| B. | underdamped |
| C. | undamped |
| D. | overdamped |
| Answer» C. undamped | |
| 5803. |
For a second-order system with the closed-loop transfer function The settling time for 2-percent band, in seconds, is : |
| A. | 1.5 |
| B. | 2.0 |
| C. | 3.0 |
| D. | 4.0 |
| Answer» C. 3.0 | |
| 5804. |
An open loop transfer function is given by has |
| A. | one zero at |
| B. | two zeros at |
| C. | three zeros at |
| D. | four zeros at |
| Answer» D. four zeros at | |
| 5805. |
In the epitaxial diffused method of fabricating integrating circuits the process involved are __________ Epitaxial growthDiffusionSilicon diode growthVacuum evaporation of aluminiumPhotoetching The correct order is |
| A. | 1 - 2 - 3 - 4 - 5 |
| B. | 1 - 3 - 5 - 2 - 4 |
| C. | 3 - 1 - 4 - 5 - 2 |
| D. | 1 - 3 - 2 - 4 - 5 |
| Answer» C. 3 - 1 - 4 - 5 - 2 | |
| 5806. |
Which of the following introduces mode partition noise? |
| A. | Coaxial line |
| B. | Waveguide |
| C. | Fibre transmission line |
| D. | Both coaxial line and waveguide |
| Answer» C. Fibre transmission line | |
| 5807. |
In an n-type silicon crystal at room temperature, which of the following can have a concentration of 4 x 1019 cm-3? |
| A. | Silicon atoms |
| B. | Holes |
| C. | Dopant atoms |
| D. | Valence electrons |
| Answer» D. Valence electrons | |
| 5808. |
The reflection coefficient on a 500 m long transmission line has a phase angle of - 150 . If the operating wavelength is 150 m, what will be the number of voltage maxima on the line? |
| A. | 0 |
| B. | 3 |
| C. | 6 |
| D. | 7 |
| Answer» D. 7 | |
| 5809. |
It is required to match a 200 load to a 450 transmission line. To reduce the SWR along the line to 1, what must be the characteristic impedance of the quarter-wave transformer used for this purpose, if it is connected directly to the load? |
| A. | 90 k |
| B. | 300 k |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-05-81-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-05-81-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-05-81-3.png"> | |
| 5810. |
Consider the following assertionsSI: For Zener effect at occur, a very abrupt junction is requiredS2: For quantum tunnelling to occur, a very narrow energy barrier is requiredWhich of the following is correct? |
| A. | Only S2 is true |
| B. | SI and S2 are both true but S2 is not a reason for SI |
| C. | SI and S2 are both true and S2 is a reason for SI |
| D. | Both SI and S2 are false |
| Answer» B. SI and S2 are both true but S2 is not a reason for SI | |
| 5811. |
For a standard 2nd order system the maximum overshoot is 10% to an unit step input. If the magnitude of the input is doubled, then maximum overshoot and percentage of maximum overshoot is: |
| A. | maximum overshoot doubles and percentage of maximum overshoot is less than double |
| B. | maximum overshoot doubles and percentage of maximum overshoot do not change |
| C. | maximum overshoot remain same and percentage of maximum overshoot is double |
| D. | maximum overshoot more than double and percentage of maximum overshoot is less than double |
| Answer» C. maximum overshoot remain same and percentage of maximum overshoot is double | |
| 5812. |
Consider the differential amplifier shown in figure. (Assume is very high).Zin (base) = |
| A. | 1 M |
| B. | 100 k |
| C. | 15 k |
| D. | 0 |
| Answer» D. 0 | |
| 5813. |
Assertion (A): The line integral of B about a closed contour, in a region containing steady current, is 0 times the total net current, following through the contour of integration.Reason (R): The curl of B is equal to 0 times the current density vector J |
| A. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
| B. | Both (A) and (R) are true but (R) is not the correct explanation of (A) |
| C. | (A) is true but (R) is false |
| D. | (A) is false but (R) is true |
| Answer» C. (A) is true but (R) is false | |
| 5814. |
Which of the following counters can be used to divide the clock frequency of a microprocessor by 5? |
| A. | 3 bit counter |
| B. | 5 bit counter |
| C. | mod 3 counter |
| D. | mod 5 counter |
| Answer» E. | |
| 5815. |
In the given circuit, the switch has been in position 1 for quite a long time. At t = 0 the switch is moved to position 2. At this position what is the time constant? |
| A. | 0.1 s |
| B. | 1 s |
| C. | 0.11 s |
| D. | 1.11 s |
| Answer» B. 1 s | |
| 5816. |
A divide by 78 counters can be realized by using |
| A. | six mod-13 counters |
| B. | thirteen mod-6 counters |
| C. | one mod 13 counter followed by one mod-6 counter |
| D. | thirteen mod-13 counters |
| Answer» B. thirteen mod-6 counters | |
| 5817. |
The process of extension of a single-crystal surface by growing a film in such a way that the added atoms form a continuation of the single-crystal structure is called |
| A. | Ion implantation |
| B. | Chemical vapour deposition |
| C. | Electroplating |
| D. | Epitaxy |
| Answer» E. | |
| 5818. |
Which of the following are the non-linear application of op-amp? Current-to-voltage converterComparatorPeak detectorLimiter Select the correct answer from the codes given below: |
| A. | 1, 2 and 3 |
| B. | 2, 3 and 4 |
| C. | 1, 3 and 4 |
| D. | 1, 2 and 4 |
| Answer» C. 1, 3 and 4 | |
| 5819. |
When a vector has positive divergence, it indicates that the vector quantity has at that point and if the divergence is negative, it indicates __________ . |
| A. | source, sink |
| B. | sink, source |
| C. | positive value, negative value |
| D. | negative value, positive value |
| Answer» B. sink, source | |
| 5820. |
A function of one of more variables which conveys information on the nature of physical phenomenon is called |
| A. | Noise |
| B. | Interference |
| C. | System |
| D. | Signal |
| Answer» E. | |
| 5821. |
A current source with three basic transistors is shown. All transistors are similar. All are having finite current gain Then I0 is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-01-1-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-01-1-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-01-1-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-01-1-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-01-1-2.png"> | |
| 5822. |
Which of the following represent a wave equation for a tightly stretched elastic string of length l and 'm', mass per unit? |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-12-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-12-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-12-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-12-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-12-3.png"> | |
| 5823. |
A silicon wafer has 100 nm of oxide it and is inserted in a furnace at a temperature above 1000 C for further oxidation in dry oxygen. The oxidation rate |
| A. | is independent of current oxide thickness and temperature |
| B. | is independent of current oxide thickness but depends on temperature |
| C. | slows down as the oxide grows |
| D. | is zero as the existing oxide prevents further oxidation |
| Answer» E. | |
| 5824. |
It is very likely in __________ gate family that when one gate is driving number of gates in __________ , a gate having least voltage for saturation may consume large __________ leaving other gates inoperative and this phenomenon is called __________ . |
| A. | DTL, parallel, current, current - sinking |
| B. | DCTL, parallel, current, current-lagging |
| C. | ECL, series, voltage, voltage-deterioration |
| D. | DCTL, series, current, current-lagging |
| Answer» C. ECL, series, voltage, voltage-deterioration | |
| 5825. |
The unit step response of an under damped second system has steady state value of - 2. Which one of the following transfer functions has these properties? |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-05-45-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-05-45-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-05-45-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-05-45-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-05-45-3.png"> | |
| 5826. |
For a system with transfer function The bandwidth of the system is (rad/sec) |
| A. | 2.828 |
| B. | 5.2915 |
| C. | 5.088 |
| D. | cannot be determined |
| Answer» D. cannot be determined | |
| 5827. |
The output of a Mealy system is 1 if there has been a pattern of 11000, otherwise 0. The minimum state for this system is : |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» C. 6 | |
| 5828. |
A compensated wattmeter has its reading corrected for error due to which one of the following parameters? |
| A. | Frequency |
| B. | Friction |
| C. | Power consumed in current coil |
| D. | Power consumed in pressure coil |
| Answer» E. | |
| 5829. |
Personal computer cannot be used for which one of the following? |
| A. | Game playing |
| B. | Weather forecasting |
| C. | Office Automation |
| D. | Home computing |
| Answer» C. Office Automation | |
| 5830. |
Which of the following output configurations are available in a TTL gate? Open collector outputTotem pole outputTristate output Select the correct answer from the codes given below: |
| A. | 1 only |
| B. | 1 and 2 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» E. | |
| 5831. |
Consider the differential amplifier shown in figure. (Assume is very high).VC = |
| A. | 5 V |
| B. | 10 V |
| C. | 15 V |
| D. | 30 V |
| Answer» C. 15 V | |
| 5832. |
The property not valid for basic singularity function is |
| A. | it is even signal |
| B. | convolution of any arbitrary function x{t) and an impulse is the original function itself. |
| C. | the sum of two impulses at same location is the impulse with the strength equal to the summation of individual strengths. |
| D. | none of these. |
| Answer» E. | |
| 5833. |
Which of the following networks represents a voltage shunt feedback? |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-786-20-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-786-20-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-786-20-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-786-20-4.png"> |
| Answer» E. | |
| 5834. |
A series R-C circuit with R = 3 and XC = 4 at 50 Hz is supplied with a voltage V = 50 + 141.4 sin 314 t. What is the RMS value of the current flowing through the circuit? |
| A. | 5 A |
| B. | 10 A |
| C. | 20 A |
| D. | 22-36 A |
| Answer» D. 22-36 A | |
| 5835. |
The amplitude of a random signal uniformly distributed between - 5 V and 5 VIf the signal to quantization noise ratio required in uniformly quantizing the signal is 4.5dB, the step size of the quantization is approximately |
| A. | 0.0333 V |
| B. | 0.05 V |
| C. | 0.0667 V |
| D. | 0.10 V |
| Answer» D. 0.10 V | |
| 5836. |
In TV transmission the modulation schemes for video and audio are respectively |
| A. | FM and AM |
| B. | FM and FM |
| C. | AM and FM |
| D. | AM and AM |
| Answer» D. AM and AM | |
| 5837. |
Assertion (A): Ideal current sources and ideal voltage sources do not exist in reality.Reason (R): All sources have finite internal impedances. |
| A. | Both A and R are individually true and R is the correct explanation of A |
| B. | Both A and R are individually true but R is not the correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» B. Both A and R are individually true but R is not the correct explanation of A | |
| 5838. |
A signal occupies a band 5 kHz to 10 kHz. For proper error free reconstruction at what rate it should be sampled? |
| A. | 10 kHz |
| B. | 20 kHz |
| C. | 5 kHz |
| D. | (10 + 5) x 2 kHz |
| Answer» B. 20 kHz | |
| 5839. |
Which of the following circuits come under the class of combinational logic circuits? Full adderFull subtractorHalf adderJ-K flip-flopCounter Select the correct answer from the codes given below: |
| A. | 1 only |
| B. | 3 and 4 |
| C. | 4 and 5 |
| D. | 1, 2 and 3 |
| Answer» E. | |
| 5840. |
Consider a 565 PLL with RT = 10 k and CT = 0.01 F. What is the output frequency of the VCO? |
| A. | 10 kHz |
| B. | 5 kHz |
| C. | 2.5 kHz |
| D. | 1.25 kHz |
| Answer» B. 5 kHz | |
| 5841. |
In a microprocessor, the service routine for a certain interrupt starts from a fixed location of memory which cannot be externally set, but the interrupt can be delayed or rejected. Such an interrupt is |
| A. | non-maskable and non-vectored |
| B. | maskable and non-vectored |
| C. | non-maskable and non-vectored |
| D. | maskable and vectored |
| Answer» E. | |
| 5842. |
Which one of the following statements is not correct with regard to power amplifiers? |
| A. | The collector current is large |
| B. | They are used as the front end of multi-stage amplifiers |
| C. | They are used near the end of the multi-stage amplifiers |
| D. | They have a high power rating |
| E. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/9-01-4.png"> |
| Answer» C. They are used near the end of the multi-stage amplifiers | |
| 5843. |
Which of the following cannot provide as much time interval accuracy as the oscilloscope but can capture and display eight or more signals simultaneously, something that scopes cannot do? |
| A. | Logic analyzer |
| B. | Digital oscilloscope |
| C. | Frequency analyzer |
| D. | Wave analyzer |
| Answer» B. Digital oscilloscope | |
| 5844. |
A DC voltage source is connected across a series R - L - C circuit. Under steady-state conditions, the applied DC voltage drops entirely across the |
| A. | R only |
| B. | C only |
| C. | L only |
| D. | R and L combination |
| Answer» C. L only | |
| 5845. |
The Function F = (0, 3, 4, 5, 7) is implemented using the multiplexer then Identify the correct one : |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-05-43-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-05-43-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-05-43-3.png"> |
| D. | None |
| Answer» D. None | |
| 5846. |
The Table given below is the mark obtained by 2 students in 8 different subjects. The coefficient of correlation is: |
| A. | -0.4748 |
| B. | 0.4748 |
| C. | -0.0338 |
| D. | 0.0338 |
| Answer» B. 0.4748 | |
| 5847. |
Assertion (A): The h-parameter model of a BJT can be derived from its hybrid-p model and vice-versa.Reason (R): The hybrid-p model has many more additional elements as compared to h-parameter model of the BJT. |
| A. | Both A and R are individually true and R is the correct explanation of A |
| B. | Both A and R are individually true but R is not the correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» C. A is true but R is false | |
| 5848. |
Which of the following statements about the matched filter in a communication receiver are correct? Its impulse response depends on the signed shapeIt maximizes the SNR at the detection shape.It produces ISI.It may produce phase error if synchronization is improper. Select the correct answer from the codes given below: |
| A. | 1 and 4 only |
| B. | 1 and 2 only |
| C. | 2, 3 and 4 |
| D. | 1, 2 and 4 |
| Answer» C. 2, 3 and 4 | |
| 5849. |
In a conventional AM superhetrodyne receivers, the detectors employed to extract intelligence include |
| A. | Peak detectors |
| B. | Ratio detectors |
| C. | PLL |
| D. | Slope detectors |
| Answer» B. Ratio detectors | |
| 5850. |
A network has two sources of different frequencies. The only method of analysis which can be used to find current and voltages of different branches is the use of |
| A. | Kirchoff's laws |
| B. | Superposition theorem |
| C. | Thevenin's theorem |
| D. | Tellegen's theorem |
| Answer» C. Thevenin's theorem | |