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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.
| 2601. |
The expression given is F(A, B , C, D, E, F, G, H) = (33, 48, 102, 158, 222, 229, 233, 243, 255); then the __________ and __________ minterms are grouped together into dual and variable __________ is reduced using the dual |
| A. | 243, 233, D |
| B. | 222, 158, B |
| C. | 243, 255, A |
| D. | 229, 243, E |
| Answer» C. 243, 255, A | |
| 2602. |
The correct sequence of subsystems in an FM receiver is |
| A. | Mixer, RF amplifier, Limiter, IF amplifier. Discriminator, Audio amplifier |
| B. | RF amplifier, Mixer, IF amplifier, Limiter, Discriminator, Audio amplifier |
| C. | RF amplifier, Mixer, Limiter, Discriminator IF amplifier, Audio amplifier |
| D. | Mixer, IF amplifier, RF amplifier, Audio amplifier, Discriminator |
| Answer» C. RF amplifier, Mixer, Limiter, Discriminator IF amplifier, Audio amplifier | |
| 2603. |
A fully charged mobile phone with a 12 V battery is good for a 20 minute talktime. Assume that, during the talk time, the battery delivers a constant current of 2 A and its voltage drops linearly from 12 V to 10 V as shown in the figure. How much energy does the battery deliver during this talk time? |
| A. | 220 J |
| B. | 12 kJ |
| C. | 13.2 kJ |
| D. | 14.4 kJ |
| Answer» D. 14.4 kJ | |
| 2604. |
When transistor is used as a switch __________ is defined as the interval which elapses between the transition of input waveform and the time when to transition to 90% of Ic(sat). |
| A. | storage time |
| B. | fall time |
| C. | turn-on time |
| D. | turn-off time |
| Answer» B. fall time | |
| 2605. |
An audio signal is to be transmitted digitally. Which is the system best suited for good fidelity? |
| A. | 8 bit PCM |
| B. | 13 bit PCM |
| C. | 32 bit PCM |
| D. | PCM system with non-uniform quantizer |
| Answer» E. | |
| 2606. |
For the circuit of the following figure, with an ideal op-amp, the maximum phase shift of the output with reference to the input is : |
| A. | 0 |
| B. | 90 |
| C. | -90 |
| D. | 180 |
| Answer» E. | |
| 2607. |
The junction capacitance of a linearly graded pn junction (with applied voltage = VB) is proportional to |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-02-24-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-02-24-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-02-24-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-02-24-4.png"> |
| Answer» E. | |
| 2608. |
Assertion (A): An unbiased p-n junction develops a built-in potential at the junction with the n-side positive and the p-side negative.Reason (R): The p-n junction behaves as a battery and supplies current to a resistance connected across its terminals. |
| 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» D. A is false but R is true | |
| 2609. |
(2)3 + (3)4 = (?)5 |
| A. | 4 |
| B. | 11 |
| C. | none of these |
| D. | not possible |
| Answer» D. not possible | |
| 2610. |
Radiation resistance of an antenna is 54 &ohm; and loss resistance is 6 &ohm;. If antenna has power gain of 10, then directivity is: |
| A. | 9 |
| B. | 11.11 |
| C. | data not sufficient |
| D. | 10 |
| Answer» C. data not sufficient | |
| 2611. |
In the circuit shown below current through the resistor is shown. Voltage across 4 &ohm; resistor is: |
| A. | 8 volt |
| B. | 5.87 V |
| C. | 6.87 V |
| D. | None of these |
| Answer» C. 6.87 V | |
| 2612. |
The energy of constant-amplitude complex valued exponential sequence is __________ (where A is the constant amplitude) |
| A. | 0 |
| B. | 1 |
| C. | |
| D. | <i>A</i> |
| E. | <sup>2</sup> |
| Answer» D. <i>A</i> | |
| 2613. |
Find Z11, |
| A. | 2 |
| B. | 4 |
| C. | 1 |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/2-755-39-2.png"> |
| E. | |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/2-755-39-2.png"> | |
| 2614. |
Consider the pulse shape s(t) as shown. The impulse response h(t) of the filter matched to this pulse is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-24-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-24-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-24-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-24-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-24-4.png"> | |
| 2615. |
If the closed-loop transfer function T(s) of a unity negative feedback system is given by then the steady state error for a unit ramp input is : |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-03-25-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-03-25-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-03-25-3.png"> |
| D. | |
| Answer» E. | |
| 2616. |
For each of the positive edge-triggered J-K flip flop used in the following figure, the propagation delay is TWhich of the following waveforms correctly represents the output at Q1? |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-08-59-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-08-59-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-08-59-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-08-59-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-08-59-3.png"> | |
| 2617. |
If g(t) = e-pt2 then G(1/p) is __________ where g(t) G(f) |
| A. | <i>e<sup>-2/<span class="symbol">p</span></sup></i> |
| B. | <i>e<sup>-1/<span class="symbol">p</span></sup></i> |
| C. | <i>e<sup>-<span class="symbol">p</span></sup></i> |
| D. | <i>e<sup>2<span class="symbol">p</span></sup></i> |
| Answer» C. <i>e<sup>-<span class="symbol">p</span></sup></i> | |
| 2618. |
The system shown in figure remains stable when : |
| A. | k - 1 |
| B. | -1 < k < 1 |
| C. | l < k < 3 |
| D. | k > 3 |
| Answer» E. | |
| 2619. |
Find Leq if each L is 1 H |
| A. | 4/3 H |
| B. | 1/3 H |
| C. | 2/3 H |
| D. | 3/2 D |
| Answer» D. 3/2 D | |
| 2620. |
Which of the following transducers requires a high input impedance preamplifier for proper measurements? |
| A. | Thermocouple |
| B. | Piezoelectric |
| C. | Thermistor |
| D. | L.V.D.T |
| Answer» C. Thermistor | |
| 2621. |
Given the transfer function Polar plot will be of shape. |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-746-40-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-746-40-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-746-40-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-746-40-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-746-40-2.png"> | |
| 2622. |
Transfer function of a certain system isWhich one of the following will be the A, B matrix pair of state variable representation of this system? |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-03-42-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-03-42-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-03-42-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-03-42-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-03-42-3.png"> | |
| 2623. |
Consider the following circuits. Assume all gates to have finite propagation delayWhich of these circuits generate a periodic square wave at the output Vo? |
| A. | (1) only |
| B. | (1) and (2) only |
| C. | (2) (3) and (4) only |
| D. | All (1) (2) (3) and (4) |
| Answer» D. All (1) (2) (3) and (4) | |
| 2624. |
A 4 bit shift register is initialized to value 1000 for (Q3, Q2, Q1, Q0). The D input is derived from Q0, Q2 and Q3 through two XOR gates as shown in figure. The pattern 1000 will appear at |
| A. | 3rd pulse |
| B. | 7th pulse |
| C. | 6th pulse |
| D. | 4th pulse |
| Answer» D. 4th pulse | |
| 2625. |
Which of the following is a microwave power amplifier? |
| A. | Gunn diode |
| B. | Reflex klystron |
| C. | Magnetron |
| D. | Travelling wave tube |
| Answer» E. | |
| 2626. |
Find current i. |
| A. | 4/5 A |
| B. | 5/4 A |
| C. | 1.23 A |
| D. | 1.32 A |
| Answer» B. 5/4 A | |
| 2627. |
The Vs is given by |
| A. | 8 V |
| B. | 13 V |
| C. | 1 V |
| D. | 4 V |
| Answer» C. 1 V | |
| 2628. |
For the 8085 assembly language program given below, the content of the accumulator after the execution of the program is |
| A. | 00H |
| B. | 45H |
| C. | 67H |
| D. | E7H |
| Answer» D. E7H | |
| 2629. |
The Taylor series expansion of at x = p is given by |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-22-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-22-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-22-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-22-4.png"> |
| Answer» E. | |
| 2630. |
In the signal flow graph of figure, y/x equals. |
| A. | 3 |
| B. | 5/2 |
| C. | 2 |
| D. | None of the above |
| Answer» D. None of the above | |
| 2631. |
A system with transfer function has an output for the input signal . Then, the system parameter 'p' is |
| A. | <span class="root">3</span> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-18-3.png"> |
| C. | 1 |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-18-4.png"> |
| Answer» C. 1 | |
| 2632. |
Which one of the following is applicable to any network-linear or non-linear, active or passive, time-varying or invariant - as long as Kirchhoff laws are not violated? |
| A. | Tellegen's theorem |
| B. | Reciprocity theorem |
| C. | Maximum power transfer theorem |
| D. | Superposition theorem |
| Answer» B. Reciprocity theorem | |
| 2633. |
In a network with twelve circuit elements and five nodes, what is the minimum number of mesh equations? |
| A. | 24 |
| B. | 12 |
| C. | 10 |
| D. | 8 |
| Answer» E. | |
| 2634. |
Assertion (A): The expression E = - V, where E is the electric field and V is the potential is not valid for time varying fields.Reason (R): The curl of a gradient is identically zero. |
| 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 | |
| 2635. |
Which of the following are included in the architecture of a computer? Addressing modes, CPUInstruction set, data formatsSecondary memory, operating system Select the correct answer from the codes given below: |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | 3 only |
| Answer» B. 1 and 3 | |
| 2636. |
Consider the voltage transfer characteristic of a standard CMOS inverterwhere region A corresponds to |
| A. | NMOS and PMOS triode |
| B. | Both are saturation |
| C. | NMOS saturated PMOS linear |
| D. | None of these |
| Answer» D. None of these | |
| 2637. |
The nodal method of circuit analysis is based on |
| A. | KVLs, ohm law |
| B. | KCLs, ohm law |
| C. | KCLs, KVL |
| D. | KCL, KVL, ohms law |
| Answer» C. KCLs, KVL | |
| 2638. |
In figure, the current I |
| A. | is 2 A from A to B |
| B. | is 2 A from B to A |
| C. | depends on the value of R |
| D. | none of the above |
| Answer» B. is 2 A from B to A | |
| 2639. |
During discharging a capacitor through a resistance, voltages across R and C are equal in magnitude. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2640. |
In an RLC series circuit having finite values of RLC, the phase difference between applied voltage and current is |
| A. | always 0 |
| B. | between 0 and 180 |
| C. | between 0 and 90 |
| D. | always 90 |
| Answer» E. | |
| 2641. |
In ZRC (s) = 0 at s = , the last element in second Foster realization will be |
| A. | R |
| B. | C |
| C. | R and C in series |
| D. | R and C in parallel |
| Answer» C. R and C in series | |
| 2642. |
Assertion (A): The dual of a circuit can be drawn by window-dot method. Reason (R): The principle of duality is of great help in circuit analysis. |
| A. | Both A and R are true and R is correct explanation of A |
| B. | Both A and R are true and 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 | |
| 2643. |
Hall's effect can be used to measure |
| A. | magnetic field intensity |
| B. | average number of holes |
| C. | carriers concentration |
| D. | electrostatic field intensity |
| Answer» B. average number of holes | |
| 2644. |
For insulators the energy gap is of the order of |
| A. | 0.1 eV |
| B. | 0.7 eV |
| C. | 1.1 eV to 1.2 eV |
| D. | 5 to 15 eV |
| Answer» E. | |
| 2645. |
The Ni-Zn ferrites are used for audio and TV transformers is that |
| A. | they have large saturation magnetisation |
| B. | they are easy to fabricate by rolling |
| C. | they are free from pores and voids |
| D. | they have high electro-resistivity |
| Answer» B. they are easy to fabricate by rolling | |
| 2646. |
When electronic emission occurs due to bombardment of high velocity electrons on a metal surface, it is called secondary emission. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2647. |
The reverse saturation current depends on the reverse bias. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2648. |
The current due to thermionic emission is given by Richardson Dushman equation. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2649. |
The thermionic emission current is given by |
| A. | Fermi-Dirac distribution |
| B. | Maxwell's equation |
| C. | Richardson Dushman equation |
| D. | Langmuir Child law |
| Answer» D. Langmuir Child law | |
| 2650. |
In forward active region, the operation of a BJT |
| A. | both junctions are forward biased |
| B. | both junctions are reverse biased |
| C. | emitter base junction is forward biased and base collector junction is reverse biased |
| D. | emitter base junction is reverse biased and base collector junction is reverse biased |
| Answer» D. emitter base junction is reverse biased and base collector junction is reverse biased | |