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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.
| 5401. |
F = (0, 3, 4, 5, 7) = |
| A. | [B C] + AC |
| B. | B'C' + BC + AC |
| C. | AB + BC + CA |
| D. | None |
| Answer» C. AB + BC + CA | |
| 5402. |
Assuming that flip-flops are in reset condition initially, the count sequence observed at QA in the circuit shown is |
| A. | 0010111... |
| B. | 0001011... |
| C. | 0101111... |
| D. | 0110100... |
| Answer» E. | |
| 5403. |
The matrix A is defined as A = . The eigen values of A2 are |
| A. | -1, -9, -4 |
| B. | 1, 9, 4 |
| C. | 1, 3, -2 |
| D. | -1, -3, 2 |
| Answer» C. 1, 3, -2 | |
| 5404. |
A uniform plane wave travelling in air is incident on the plane boundary between air and another dielectric medium with er = 15. The reflection coefficient for normal incidence is |
| A. | 0.6 0 |
| B. | 1 0 |
| C. | 0.6 180 |
| D. | 1.2 180 |
| Answer» D. 1.2 180 | |
| 5405. |
In a J-K FF we have J = Q and K = 1. Assuming the FF was initially cleared and then clocked for 6 pulses, the sequence at the Q output will be |
| A. | 010000 |
| B. | 011001 |
| C. | 010010 |
| D. | 010101 |
| Answer» E. | |
| 5406. |
The magnitude plot of a composite signal x(t) = e3jt + e4jt is __________ . |
| A. | Half wave rectified sinusoid |
| B. | Full wave rectified sinusoid |
| C. | Exponentially increasing sinusoid |
| D. | Exponentially decreasing sinusoid |
| Answer» C. Exponentially increasing sinusoid | |
| 5407. |
The rms value of the periodic waveform e(t) shown in fig. is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/2-758-62-2.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/2-758-62-3.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/2-758-62-4.png"> |
| D. | <span class="root">3</span> |
| E. | A |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/2-758-62-4.png"> | |
| 5408. |
A transmission line terminates in two branches, each of length /4, as shown. The branches are terminated by 50 loads. The lines are lossless and have the characteristics impedances shown. Determine the impedance Z1 as seen by the source |
| A. | 200 |
| B. | 100 |
| C. | 50 |
| D. | 25 |
| Answer» E. | |
| 5409. |
The Nyquist plot of |
| A. | will start from ( = ) in the first quadrant and will terminate ( = 0) in the second quadrant |
| B. | will start from ( = ) in the fourth quadrant and will terminate ( = 0) in the second quadrant |
| C. | will start form ( = ) in the second quadrant and will terminate ( = 0) in the fourth quadrant |
| D. | will start from ( = ) in the first quadrant and will terminate ( = 0) in the fourth quadrant |
| Answer» B. will start from ( = ) in the fourth quadrant and will terminate ( = 0) in the second quadrant | |
| 5410. |
The trigonometric Fourier series for the waveform f(t) shown below contain |
| A. | only cosine terms and zero value for the dc component |
| B. | only cosine terms and a positive value for the dc component |
| C. | only cosine terms and a negative value for the dc component |
| D. | only sine terms and a negative for the dc component |
| Answer» D. only sine terms and a negative for the dc component | |
| 5411. |
For a class B amplifier using a supply of VCC = 30 V and driving a load of 16 the maximum efficiency will be __________ . |
| A. | 72.4% |
| B. | 78.54% |
| C. | 62.4% |
| D. | 68.54% |
| Answer» C. 62.4% | |
| 5412. |
If x[n] = cos then the sequence x[n] is |
| A. | non-periodic |
| B. | periodic |
| C. | depends on |
| D. | <i>n</i> |
| E. | none of these |
| Answer» B. periodic | |
| 5413. |
The point P in the following figure is stock at 1. The output f will be |
| A. | <span style="text-decoration:overline;">ABC</span> |
| B. | <span style="text-decoration:overline;">A</span> |
| C. | AB |
| D. | <span style="text-decoration:overline;">C</span> |
| E. | A |
| Answer» E. A | |
| 5414. |
In a certain network not containing any dependent sources, number of nodes = 4 and number of branches is equal to 6. |
| A. | 4 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» D. 5 | |
| 5415. |
A 4 cm by 3 cm rectangular waveguide with air cavity, is operating at 12 GHz with TE11 mode. The cut-off frequency is: |
| A. | 6.25 GHz |
| B. | 4.75 GHz |
| C. | 1.5 GHz |
| D. | 8.75 GHz |
| Answer» B. 4.75 GHz | |
| 5416. |
In the following transistor circuit VBE = 0. 7 V, rc = 25mV/IE, and and the capacitance are very largeThe mid-band voltage gain of the amplifier is approximately |
| A. | - 180 |
| B. | - 120 |
| C. | - 90 |
| D. | - 60 |
| Answer» E. | |
| 5417. |
The probability density function of a random variable x is as shown. The mean of the distribution is: |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-749-79-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-746-42-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-749-79-2.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-21-3.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-21-3.png"> | |
| 5418. |
What is the propagation constant for air filled wave guide with dimensions a = 1.59" and b = 0.795" at 4.95 GHz. The wave impedance is |
| A. | 400.94 |
| B. | 562.94 |
| C. | 502.80 |
| D. | 492.80 |
| Answer» C. 502.80 | |
| 5419. |
Px(X) = M exp(- 2 |x|) + N exp(- 3 |x|) is the probability density function for the real random variable X, over the entire x axis. M and N are both positive real numbers. The equation relating M and N is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-04-29-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-04-29-2.png"> |
| C. | M + N = 1 |
| D. | M + N = 3 |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-04-29-2.png"> | |
| 5420. |
The electric field component of a time harmonic plane EM wave travelling in a non magnetic lossless dielectric medium has an amplitude of 1 V/m. If the relative permittivity of the medium is 4, the magnitude of the time-average power density vector (in W/m2) is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-25-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-25-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-25-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-25-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-25-4.png"> | |
| 5421. |
A unity negative feedback closed loop system has a plant with the transfer function and a controller Gc(S) in the feed forward path. For a unit set input, the transfer function of the controller that gives minimum steady state error is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-05-44-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-05-44-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-05-44-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-05-44-4.png"> |
| Answer» E. | |
| 5422. |
A short grounded vertical antenna has a length L which is 0.05 at frequency f. If its radiation resistance at f is R ohms, then its radiation resistance at a frequency 2f will be |
| A. | R/2 |
| B. | R |
| C. | 2R |
| D. | 4R |
| Answer» E. | |
| 5423. |
In the signal flow graph of figure below, the gain C/R will be : |
| A. | 11/9 |
| B. | 22/15 |
| C. | 24/23 |
| D. | 44/23 |
| Answer» E. | |
| 5424. |
In the circuit shown, the device connected to Y5 can have address in the range |
| A. | 2000 - 20FF |
| B. | 2D00 - 2DFF |
| C. | 2E00 - 2EFF |
| D. | FD00 - FDFF |
| Answer» C. 2E00 - 2EFF | |
| 5425. |
The order of the differential equation is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 5426. |
If over the path shown in the figure is |
| A. | 0 |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-28-2.png"> |
| C. | 1 |
| D. | 2 |
| E. | <span class="root">3</span> |
| Answer» D. 2 | |
| 5427. |
Find the value of K for which Vy = 0 |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-07-90-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-07-90-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-07-90-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-07-90-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-07-90-4.png"> | |
| 5428. |
Two coils X of 1000 turns and Y of 2000 turns are placed such that 60% of the flux produced by coil X links coil Y. A current of 1 A in coil X produces 0.1 wb flux. The mutual inductance between coils is |
| A. | 0.12 H |
| B. | 0.08 H |
| C. | 0.06 H |
| D. | 0.04 H |
| Answer» B. 0.08 H | |
| 5429. |
A system with transfer function H(z) has impulse response h(.) defined as h(2) = 1, h(3) = -1 and h(k) = 0 otherwise. Consider the following statementsS1: H(z) is a low pass filterS2: H(z) is a FIR filter.Which of the following is correct? |
| A. | Only S2 is true |
| B. | Both S1 and S2 are false |
| C. | Both S1 and S2 are true, and S2 is a reason for S1 |
| D. | Both S1 and S2 are true, but S2 is not a reason for S1 |
| Answer» B. Both S1 and S2 are false | |
| 5430. |
Consider an incremental vector element of length L and angle between an electric field E and L s cos . Then in which direction should L be placed to be obtain maximum value of v? |
| A. | In the direction of E |
| B. | In opposite direction of E |
| C. | In the angle of 45 with E |
| D. | In the angle of 60 with E |
| Answer» C. In the angle of 45 with E | |
| 5431. |
A MOD - 2 counter, the FF has a tpd = 60 nsec. The NOR gate has a tpd of 30 nsec. The clock frequency is |
| A. | 37 MHz |
| B. | 40 MHz |
| C. | 111 MHz |
| D. | none |
| Answer» B. 40 MHz | |
| 5432. |
Evaluate the power stored in inductor and capacitor |
| A. | 25 J, 12.5 J |
| B. | 12.5 J, 25 J |
| C. | 25 J, 50 J |
| D. | 12.5 J, 50 J |
| Answer» B. 12.5 J, 25 J | |
| 5433. |
If the Laplace transform of the voltage transform of the voltage across a capacitor of value F is the value of the current through the capacitor at t = 0+ is |
| A. | 0 A |
| B. | 2 A |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/10-03-28-1.png"> |
| D. | A |
| E. | 1 A |
| Answer» D. A | |
| 5434. |
A message signal given by is amplitude modulated with a carrier of frequency c to generate s(t) = [1 + m(t)] cos ct |
| A. | 8.33% |
| B. | 11.11% |
| C. | 20% |
| D. | 25% |
| Answer» D. 25% | |
| 5435. |
The magnitude plot of a composite signal x(t) = e2jt + e3jt is |
| A. | Half wave rectified sinusoid |
| B. | Full wave rectified sinusoid |
| C. | Exponentially increasing sinusoid |
| D. | Exponentially decreasing sinusoid |
| Answer» C. Exponentially increasing sinusoid | |
| 5436. |
The Boolean expression B E is a simplified version of expression ABE + BCDE+ BC D E + A B D E + B C D E + A B D E then which of the following choice is correct? don't care conditions doesn't existdon't care conditions existd( 16, 18, 20, 23, 27, 29) is the set of don't care conditionsd( 16, 20, 22, 27, 29) is the set of don't care conditions |
| A. | 1 only |
| B. | 2 and 3 only |
| C. | 2 and 4 only |
| D. | data insufficient |
| Answer» D. data insufficient | |
| 5437. |
A first order system will never be able to give a __________ response. Band passBand rejectAll pass Choose the correct option |
| A. | 1, 2 and 3 are true |
| B. | 1 and 3 are true, 2 is false |
| C. | 1 and 2 are false, 3 is true |
| D. | 1 and 2 are true, 3 is false |
| Answer» E. | |
| 5438. |
A short vertical grounded antenna is required to radiate at 1 MHz. The effective height of the antenna is 302 m. The calculated value of radiation resistance is |
| A. | 1.58 |
| B. | 158 |
| C. | 15.8 |
| D. | none |
| Answer» D. none | |
| 5439. |
5 skilled workers can build a wall in 20 days; 8 semi-skilled worker can build a wall in 25days; 10 unskilled workers can build a wall in 30 days, If a team has 2 killed, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall? |
| A. | 20 days |
| B. | 18 days |
| C. | 16 days |
| D. | 15 days |
| Answer» E. | |
| 5440. |
In 8085 microprocessor system, can an input and output port have same port address? |
| A. | Yes |
| B. | No |
| C. | Insufficient data |
| D. | None of these |
| Answer» B. No | |
| 5441. |
The system with given T.F. to be stable will be |
| A. | causal |
| B. | anticausal |
| C. | both sided |
| D. | non causal |
| Answer» E. | |
| 5442. |
For a Gaussian process, auto-correlation also implies |
| A. | statistical dependence |
| B. | statistical independence |
| C. | ergodic process |
| D. | none of the above |
| Answer» C. ergodic process | |
| 5443. |
The eigen values of a skew symmetric matrix are |
| A. | always zero |
| B. | always pure imaginary |
| C. | either zero or pure imaginary |
| D. | always real |
| Answer» D. always real | |
| 5444. |
The current I for the network |
| A. | 0 mA |
| B. | 10.72 mA |
| C. | 10.94 mA |
| D. | 11.32 mA |
| Answer» C. 10.94 mA | |
| 5445. |
A delta modulation system is designed to operate at 3 times the Nyquist rate for a signal with a 3 KHz bandwidth. The quantization step size is 250 mv. The maximum amplitude of a 1 KHz input sinusoidal for which the delta modulator does not show slope overload is : |
| A. | 716.2 mV |
| B. | 500 mV |
| C. | 647.87 mV |
| D. | 400 mV |
| Answer» B. 500 mV | |
| 5446. |
Values of iL, , VC and at t = 0 are given by, |
| A. | 4 Amp, - 4 Amp/sec, 12 volts, - 4 volts/s |
| B. | 4 Amp, 4 Amp/sec, -12 volts, - 12 volts/s |
| C. | 6 Amp, - 2 Amp/sec, 0 volts, - 2 volts/sec |
| D. | 6 Amp, 0 Amp/sec, - 2 volts, - 2 volts/sec |
| Answer» D. 6 Amp, 0 Amp/sec, - 2 volts, - 2 volts/sec | |
| 5447. |
The analog signal given below is sampled by 600 samples per secondm(t) = 2 sin 480pt + 3 sin 720ptThe folding (maximum) frequency is __________ . |
| A. | 600 Hz |
| B. | 120 Hz |
| C. | 300 Hz |
| D. | 360 Hz |
| Answer» D. 360 Hz | |
| 5448. |
In the circuit shown, the power supplied by the voltage source |
| A. | 0 W |
| B. | 5 W |
| C. | 10 W |
| D. | 100 W |
| Answer» B. 5 W | |
| 5449. |
The value of the integral of the function g(x, y) = 4x3 + 10y4 along the straight line segment from the point (0, 0) to the point (1, 2) in the x-y plane is |
| A. | 33 |
| B. | 35 |
| C. | 40 |
| D. | 56 |
| Answer» B. 35 | |
| 5450. |
Open loop transfer function of a system isThe phase cross over frequency c is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-787-39-2.png"> |
| B. | 1 |
| C. | zero |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-787-39-3.png"> |
| Answer» C. zero | |