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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.
| 5451. |
If the sequence converges, then the series converges absolutely is |
| A. | Ratio test |
| B. | Root test |
| C. | Divergence test |
| D. | Convergence test |
| Answer» C. Divergence test | |
| 5452. |
The two numbers represent in signed 2's complement form are P = 11101101 and Q = 111001110. If Q subtracted from P, the value obtained in signed 2's complement form is |
| A. | 100000111 |
| B. | 00000111 |
| C. | 11111001 |
| D. | 111111001 |
| Answer» D. 111111001 | |
| 5453. |
The transfer function of an RLC circuit is given by quality factor (Q-factor) of this circuit is : |
| A. | 25 |
| B. | 50 |
| C. | 100 |
| D. | 5000 |
| Answer» C. 100 | |
| 5454. |
The z-transform of a signal is given by . Its final value is : |
| A. | 1/4 |
| B. | zero |
| C. | 1 |
| D. | infinity |
| Answer» D. infinity | |
| 5455. |
A conductor in x-y plane and having length 1 m is moving with a velocity V = (2i + 3j + k) m/sec. A magnetic induction field B = (i + 2j) Wb/m2 is applied to the conductor. The potential difference between the ends of the conductor is |
| A. | 0 |
| B. | 4.88 V |
| C. | <span class="root">6</span> |
| D. | V |
| E. | None of these |
| Answer» D. V | |
| 5456. |
The residue of the function at z = 2 is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-26-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-26-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-26-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-26-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-26-2.png"> | |
| 5457. |
In a number system with radix r, the decimal value of 110 is equal to 4r. The decimal values of 111 and r respective are equal to |
| A. | 20, 5 |
| B. | 16, 4 |
| C. | 13, 3 |
| D. | 8, 2 |
| Answer» D. 8, 2 | |
| 5458. |
The number of variables in a function is odd and the number of minterms with even number of 0's are same as the number of minterms with odd number at 1's, the expression formed can be represented in __________ as well as __________ form. |
| A. | Ex - OR, NOR |
| B. | Equivalence, Ex - OR |
| C. | AND, Coincidence |
| D. | OR, Ex - OR |
| Answer» C. AND, Coincidence | |
| 5459. |
The transfer function Y(s)/R(s) of the system shown is |
| A. | 0 |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-02-17-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-02-17-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-02-17-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-02-17-3.png"> | |
| 5460. |
The surface charge density on a conductor is 1.55 x 10-9C/m2. The conductor is immersed in water with = 78 0.The electric field will be __________ . |
| A. | 3 V/m |
| B. | 1.55 V/m |
| C. | 2 V/m |
| D. | 2.25 V/m |
| Answer» E. | |
| 5461. |
A 16 bit type ADC uses 1 MHz clock its maximum conversion time is __________ . |
| A. | 16 s |
| B. | 15 ms |
| C. | 6.5 ms |
| D. | 66 ms |
| Answer» D. 66 ms | |
| 5462. |
In a infinite ladder circuit as shown above each resistance of r then find RAB |
| A. | |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-05-44-2.png"> |
| C. | 1.61 |
| D. | <i>r</i> |
| E. | none of the above |
| Answer» D. <i>r</i> | |
| 5463. |
Consider the program segment written for 8085 based system:LXI S, FFFFHMVI A, 00HMVI B, 0FHSUB BCNC GOLOCMVI A, FFH where in the program subroutine labelled ''GOLOC'' introduces delay of 28 T-states only. How many T-states are required to execute above program statement? |
| A. | 41 |
| B. | 69 |
| C. | 44 |
| D. | Indeterminate |
| Answer» D. Indeterminate | |
| 5464. |
A discrete random variable X takes values from 1 to 5 with probabilities as shown in the table. A student calculates the mean of X and 3.5 and her teacher calculates the variance of X as 1.5. Which of the following statements is true? |
| A. | Both the student and the teacher are right |
| B. | Both the student and the teacher are wrong |
| C. | Both the student is wrong but the teacher is right |
| D. | The student is right but the teacher is wrong |
| Answer» C. Both the student is wrong but the teacher is right | |
| 5465. |
The effective modulation index is: |
| A. | 0.91287 |
| B. | 0.8306 |
| C. | 1 |
| D. | none of these |
| Answer» D. none of these | |
| 5466. |
The skin-depth of copper at a frequency of 3 GHz is 1 micron. At 12 GHz, for a non-magnetic conductor whose conductivity is times of copper, the skin depth would be : |
| A. | <span class="root">9 x 4</span> |
| B. | m |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-34-2.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-34-3.png"> |
| E. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-34-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-34-2.png"> | |
| 5467. |
If the z-transform of x(n) is given by then the filter it represents is __________ . |
| A. | low pass |
| B. | high pass |
| C. | band pass |
| D. | all pass |
| Answer» E. | |
| 5468. |
The system of linear equations 4x + 2y = 1 , 2x + y = 6 has |
| A. | a unique solution |
| B. | no solution |
| C. | an infinite number of solutions |
| D. | exactly two distinct solutions |
| Answer» C. an infinite number of solutions | |
| 5469. |
Which of the following periodic waveforms will have only odd harmonics of sinusoidal waveform?Select the correct option using the codes given below Codes: |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 1 and 4 |
| D. | 2 and 4 |
| Answer» B. 1 and 3 | |
| 5470. |
A control system is as shown in given figure The maximum value of gain K for which the system is stable is |
| A. | more than 5 |
| B. | equal to 5 |
| C. | less than 1 |
| D. | less than 5 |
| Answer» E. | |
| 5471. |
A transmitted using AM has in modulated carrier output power of 10 KW and can be modulated to a maximum depth of 90% by a sinusoidal modulating voltage without causing overloading. Find the value to which an modulated carrier power can be increased without resulting in overloading if the maximum permitted modulating index is 40% |
| A. | 14 KW |
| B. | 12.96 KW |
| C. | 26.96 KW |
| D. | 2.96 KW |
| Answer» C. 26.96 KW | |
| 5472. |
Hari (H), Gita (G), Irfan (I) and Saira (S) are sibiligs (i.e. brothers and sisters). All were born on 1st January. The age difference between any two successive siblings (that is born one after another) is less than 3 years. Given the following facts:(i) Hari's age + Gita's age > Irfan's age + Saira's age.(ii) The age difference between Gita and Saira is 1 year. However, Gita is not the oldest and Saira is not the youngest.(iii) There are not twins.In what order were they born (Oldest first)? |
| A. | HSIG |
| B. | SGHI |
| C. | IGSH |
| D. | IHSG |
| Answer» C. IGSH | |
| 5473. |
With respect to the following 555 timer circuit what will be the value of RA and R such that the LED turns on for a duration of 10 ms every time it receives negative trigger pulse. LED operating current = 20 mA, Vf = 1.4 V, Vo on = 13.4 V and C = 0.22 nf |
| A. | 41.4 K , 600 |
| B. | 45 K , 630 |
| C. | 43.5 K , 580 |
| D. | 44.9 K , 600 |
| Answer» B. 45 K , 630 | |
| 5474. |
The signal flow graph of a system is shown in figure. The transfer function of the system is : |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-02-7-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-02-7-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-02-7-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-02-7-4.png"> |
| Answer» E. | |
| 5475. |
The region between a pin of parallel perfectly conducting planes of infinite extent is y and z directions is partially filled with a dielectric as shown below.A 30 GHz TE10 wave is incident on the air-dielectric interface. The value of reflection coefficient at the interface is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-42-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-42-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-42-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-42-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-42-4.png"> | |
| 5476. |
Transmitted voltage level is: |
| A. | 11 |
| B. | 7.8 |
| C. | 7.348 V |
| D. | none of these |
| Answer» D. none of these | |
| 5477. |
A periodic voltage has following values for equal time intervals changing suddenly from one value to next : 0, 5, 10, 20, 50, 60, 50, 20, 10, 5, 0, - 5, - 10 etc.What would be the RMS value of a sine wave having the same peak value as that of the above mentioned periodic wave? |
| A. | 42.2 V |
| B. | 19.098 V |
| C. | 38.2 V |
| D. | none of these |
| Answer» B. 19.098 V | |
| 5478. |
The antenna current of an AM broad cast transmitter, modulated to a depth of 40% by an audio sine wave is 11 amperes. It increased to 12 ampere as a result of simultaneous modulation by another sine wave. The modulation index due to this second sine wave is : |
| A. | 0.4 |
| B. | 0.757 |
| C. | 0.643 |
| D. | 0.8 |
| Answer» D. 0.8 | |
| 5479. |
A lossless transmission line with air dielectric is 6 m long. What is the line length at 30 MHz? |
| A. | 1 wavelength long |
| B. | 0.5 wavelength long |
| C. | 0.6 wavelength long |
| D. | 0.25 wavelength long |
| Answer» D. 0.25 wavelength long | |
| 5480. |
A 1000 kHz carrier wave modulated 40% at 4000 Hz is applied to a resonant circuit tuned to a carrier frequency and having Q = 140. What is the degree of modulation after passing the wave through this circuit? |
| A. | 0.4 |
| B. | 0.2 |
| C. | 0.27 |
| D. | 0.554 |
| Answer» D. 0.554 | |
| 5481. |
The VTH at terminals A and B is equal to, |
| A. | 0 V |
| B. | 5 V |
| C. | - 5 V |
| D. | None of these |
| Answer» C. - 5 V | |
| 5482. |
A switch tail ring counter is made by using a single D FF. The resulting circuit is a |
| A. | SR FF |
| B. | JK FF |
| C. | D FF |
| D. | T FF |
| Answer» D. T FF | |
| 5483. |
The driving point impedance of the following network is given by . The component values are |
| A. | L = 5H, R = 0.5 , C = 0.1F |
| B. | L = 0.1H, R = 0.5 , C = 5F |
| C. | L = 5H, R = 2 , C = 0.1F |
| D. | L = 0.1H, R = 2 , C = 5F |
| Answer» B. L = 0.1H, R = 0.5 , C = 5F | |
| 5484. |
In a synchro error detector, the output voltage is proportional to [ (t)]n, where (t) is the rotor velocity and n equals : |
| A. | -2 |
| B. | -1 |
| C. | 1 |
| D. | 2 |
| Answer» D. 2 | |
| 5485. |
Consider an angle modulated signalx(t) = 6cos[2p x 106t + 2sin(8000pt) + 4cos(8000pt)] VThe average power of x(t) is |
| A. | 10W |
| B. | 18W |
| C. | 20W |
| D. | 28W |
| Answer» C. 20W | |
| 5486. |
Find resistance RB to bring transistor to threshold of saturation (VCB = 0), VBE = 0.7 V, a = 0.96 |
| A. | 1.5 K |
| B. | 15 K |
| C. | 10 K |
| D. | 1 K |
| Answer» B. 15 K | |
| 5487. |
The differential equation for the current i(t) in the circuit of figure is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-02-20-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-02-20-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-02-20-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-02-20-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-02-20-4.png"> | |
| 5488. |
A transmitter radiates a power 20 KW and its base current is 18A. The radiation resistance of the antenna is |
| A. | 1111 |
| B. | 900 |
| C. | 75 |
| D. | 62 |
| Answer» E. | |
| 5489. |
e-2t is __________ . |
| A. | energy signal |
| B. | power signal |
| C. | neither energy signal nor power signal |
| D. | both energy and power signal |
| Answer» D. both energy and power signal | |
| 5490. |
(29)13 &div; (29)12 x (29)x = (23)16 Find x |
| A. | 11 |
| B. | 12 |
| C. | 13 |
| D. | 16 |
| Answer» C. 13 | |
| 5491. |
If the scattering matrix [S] of a two port network is then the network is |
| A. | lossless and reciprocal |
| B. | lossless but not reciprocal |
| C. | not lossless but reciprocal |
| D. | neither lossless nor reciprocal |
| Answer» D. neither lossless nor reciprocal | |
| 5492. |
Consider the frequency modulated signal 10 cos (2p x 105t + 5 sin (2p x 1500t) + 7.5 sin (2p x 1000t) with carrier frequency of 105Hz. The modulation index is |
| A. | 12.5 |
| B. | 10 |
| C. | 7.5 |
| D. | 5 |
| Answer» C. 7.5 | |
| 5493. |
A radio wave is incident on a layer of ionosphere at an angle of 30 with the vertical. If the critical frequency is, 1.2 MHz, the maximum usable frequency is |
| A. | 1.2 MHz |
| B. | 2.4 MHz |
| C. | 0.6 MHz |
| D. | 1.386 MHz |
| Answer» E. | |
| 5494. |
The Thevenin resistance of the circuit is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-03-29-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-03-29-2.png"> |
| C. | 3 K |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-03-29-4.png"> |
| Answer» E. | |
| 5495. |
A lossless 50 transmission line is terminated 30 + j25 , then voltage reflection coefficient and current reflection coefficient are |
| A. | 062 82.88, - 0.62 82.88 |
| B. | 10.36 11.296, - 10.36 111.296 |
| C. | 0.23 49.1, - 0.23 + 49.1 |
| D. | - 10.36 111.296, 10.36 111.296 |
| Answer» E. | |
| 5496. |
Find value of i |
| A. | 1A |
| B. | 0A |
| C. | 0.45 A |
| D. | None of these |
| Answer» D. None of these | |
| 5497. |
The circuit shown in the figure has 4 boxes each described by inputs P, Q, R and outputs Y, Z withY = P Q R, Z = RQ + P R + Q PThe circuit is a |
| A. | 4 bit adder giving P + Q |
| B. | 4 bit subtractor giving P - Q |
| C. | 4 bit subtractor giving Q - P |
| D. | 4 bit adder giving P + Q + R |
| Answer» C. 4 bit subtractor giving Q - P | |
| 5498. |
Find the electric charge required on the earth and moon to balance their gravitational attraction if the charge on the earth is 12.5 times that on the moon.Mass of moon = 6.7 x 1022 KgMass of earth = 6 x 1024 KgDistance between moon and earth = 380 KmUniversal gravitational constant = 6.7 x 10-11 Nm2/Kg2 |
| A. | 48.9 TC |
| B. | 4.89 GC |
| C. | 4.89 TC |
| D. | 48.9 GC |
| Answer» D. 48.9 GC | |
| 5499. |
The transfer function of a system is . For a unit-step input to the system the approximate setting time for 2% criterion is : |
| A. | 100 sec |
| B. | 4 sec |
| C. | 1 sec |
| D. | 0.01 sec |
| Answer» C. 1 sec | |
| 5500. |
25 persons are in a room. 15 of them play hockey, 17 of them play football and 10 of them play both hockey and football. Then the number of persons playing neither hockey nor football is: |
| A. | 2 |
| B. | 17 |
| C. | 13 |
| D. | 3 |
| Answer» E. | |