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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.
| 5351. |
A Hartley oscillator uses FET with gm of 2 ms and rd = 2 K . The total coil inductance is 10 H with turns ratio of input to output side of 1 : 10. It is tuned with a 50 pf capacitor. Find frequency of oscillations, amplifier gain margin in dB. |
| A. | 7.11 MHz, 13.97 dB |
| B. | 7.3 MHz, 14.1 dB |
| C. | 6.93 MHz, 12.9 dB |
| D. | 7.4 MHz, 13 dB |
| Answer» B. 7.3 MHz, 14.1 dB | |
| 5352. |
Find the electric charge required on the earth and moon to balance their gravitational attraction if the charge on the earth is 10 times that on the moon. |
| A. | 1.73 TC |
| B. | 17.3 GC |
| C. | 17.3 TC |
| D. | 1.73 GC |
| Answer» D. 1.73 GC | |
| 5353. |
An audio signal of FM radio station is sampled at a rate of 15% above the Nyquist rate. Signal is sampled in 512 levels and bandwidth of the signal is 4 KHz. The minimum bandwidth required to transmit this signal will be |
| A. | 77 K bits/sec |
| B. | 92 K bits/sec |
| C. | 84.8 K bits/sec |
| D. | 82.8 K bits/sec |
| Answer» E. | |
| 5354. |
With respect to the Miller integrator sweep shown below, the sweep rate will be |
| A. | 2 |
| B. | 4 |
| C. | 1.5 |
| D. | 2.5 |
| Answer» B. 4 | |
| 5355. |
If V = 4 in the figure, the value of IS is given by, |
| A. | 6 A |
| B. | 5/2 A |
| C. | 12 A |
| D. | None of these |
| Answer» B. 5/2 A | |
| 5356. |
Choose correct option for a stable system : Roots of the characteristic equation of the system are real and negativeArea within the impulse response is finite |
| A. | I is true, II is true |
| B. | I is true, II is false |
| C. | I is false, II is true |
| D. | I is false, II is false |
| Answer» B. I is true, II is false | |
| 5357. |
The Z-inverse of the given Z-transform is __________ |
| A. | unit step |
| B. | unit ramp |
| C. | unit impulse |
| D. | unit parabola |
| Answer» D. unit parabola | |
| 5358. |
The q-v relation of a capacitor is v = 1 + q + qx. Find the amount of energy required to charge this capacitor from q(t0) = 0 to q(t) = 5 C. |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-40-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-40-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-40-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-40-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-40-4.png"> | |
| 5359. |
The number of distinct Boolean expressions of 3 variables is |
| A. | 8 |
| B. | 256 |
| C. | 64 |
| D. | 7 |
| Answer» C. 64 | |
| 5360. |
V-I relationship of a network N is given by, V = 8 - 4I.The equivalent circuit to the network N is shown belowThe values of IN and RN are |
| A. | 0, 2 |
| B. | 0, 4 |
| C. | 2, 4 |
| D. | None of these |
| Answer» D. None of these | |
| 5361. |
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 | |
| 5362. |
Consider the following statements a half adder. As a half subtractor alsohas two outputs CH = x x y and Sn = x y for two inputs x and yhas two outputs CH = x + y and SH = x y for two inputs x and yis a combinational circuit Which of the statements given above is/are correct? |
| A. | 1, 3, 4 |
| B. | 1, 2, 4 |
| C. | 4 only |
| D. | 2 and 3 |
| Answer» C. 4 only | |
| 5363. |
The circuit I in figure is |
| A. | 1 mA |
| B. | 4 mA |
| C. | 8 mA |
| D. | 10 mA |
| Answer» E. | |
| 5364. |
In x = the value of x is |
| A. | 10 |
| B. | 25 |
| C. | 36 |
| D. | 44 |
| Answer» E. | |
| 5365. |
A two port network shown below is external dc sources. The voltages and the currents are measured with voltmeters V1 V2 and ammeter A1 A2 (all assumed to be ideal), as indicated. Under following switch conditions, the readings obtained are:(i) S1 - Open, S2 - Closed A1 = 0A, V1 = 4.5 V, V2 = 1.5 V, A2 = 1 A(ii) S1 - Closed, S2 - Open A1 = 4A, V1 = 6 V, V2 = 6 V, A2 = 0 AThe z-parameter matrix for this network is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-76-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-76-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-76-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-76-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-76-4.png"> | |
| 5366. |
The logic circuit given below converts a binary code y1 y2, y3 into |
| A. | Excess - 3 code |
| B. | Gray code |
| C. | BCD code |
| D. | Hamming |
| Answer» D. Hamming | |
| 5367. |
The electric field of uniform plane wave is given by E = 20 sin (2 p x 108t- pz) x + 20 cos (2 p x 108t - pz) y. The polarization of wave is |
| A. | Elliptical, left handed |
| B. | Circular, left handed |
| C. | Elliptical, right handed |
| D. | Circular, right handed |
| Answer» C. Elliptical, right handed | |
| 5368. |
The Z-transform of a particular signal is given as X(Z) = where This system after practical implementation will be |
| A. | Non Causal and Stable |
| B. | Causal and Stable |
| C. | Non Causal and Unstable |
| D. | Causal and Unstable |
| Answer» C. Non Causal and Unstable | |
| 5369. |
The JFET in the circuit shown in figure has an IDSS = 10 mA and Vp = -5 V. The value of the resistance Rs for a drain current IDS = 6.4 mA is (select the nearest value) |
| A. | 150 |
| B. | 150 |
| C. | 560 |
| D. | 1 k |
| Answer» B. 150 | |
| 5370. |
The time constant of the network shown in figure is |
| A. | 2 RC |
| B. | 5/3 RC |
| C. | RC/2 |
| D. | None of these |
| Answer» C. RC/2 | |
| 5371. |
Consider the following BJT circuit:hie = 2 k ohmhfe = 100hre = 2.5 x 10-4The value of Ri is : |
| A. | 2.46 k |
| B. | 2.88 k |
| C. | 200 |
| D. | 18.48 |
| Answer» B. 2.88 k | |
| 5372. |
A plane wave having the electric field component V/m and travelling in free space in incident normally on a lossless medium with m = m0 and e = 9e0 which occupies the region y 0. The reflected magnetic field component is given by |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-05-46-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-05-46-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-05-46-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-05-46-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-05-46-2.png"> | |
| 5373. |
I1(s) and I2(s) are the Laplace transforms of i1(t) and i2(t) respectively. The equations for the circuit shown in above figure when switch S is closed at t = 0; are |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-05-41-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-05-41-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-05-41-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-05-41-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-05-41-4.png"> | |
| 5374. |
The residues of a complex function at its poles are |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-29-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-29-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-29-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-29-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-29-4.png"> | |
| 5375. |
Which of the following is equivalent to x? |
| A. | x EX-OR 0 |
| B. | x EX-NOR 0 |
| C. | 1 NOR x |
| D. | x AND x |
| Answer» C. 1 NOR x | |
| 5376. |
The electric field vector of a wave in free space ( o, o) isIts magnetic field vector will be given by |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-02-26-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-02-26-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-02-26-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-02-26-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-02-26-4.png"> | |
| 5377. |
The mechanical system shown below has its pole(s) at: |
| A. | - K/D |
| B. | - D/K |
| C. | - DK |
| D. | 0, - K/D |
| Answer» B. - D/K | |
| 5378. |
The following k-map implements |
| A. | BCD to Decimal Decoder |
| B. | Decimal to BCD Encoder |
| C. | 1 of 10 Decoder |
| D. | (a) and (c) |
| Answer» E. | |
| 5379. |
The step error coefficient of a system with unity feedback is : |
| A. | 1/6 |
| B. | |
| C. | 0 |
| D. | 1 |
| Answer» B. | |
| 5380. |
The Z-transform of a signal is given by its final value is __________ . |
| A. | infinite |
| B. | 1/4 |
| C. | zero |
| D. | 1 |
| Answer» E. | |
| 5381. |
A two port network shown below is external dc sources. The voltages and the currents are measured with voltmeters V1 V2 and ammeter A1 A2 (all assumed to be ideal), as indicated. Under following switch conditions, the readings obtained are:(i) S1 - Open, S2 - Closed A1 = 0A, V1 = 4.5 V, V2 = 1.5 V, A2 = 1 A(ii) S1 - Closed, S2 - Open A1 = 4A, V1 = 6 V, V2 = 6 V, A2 = 0 AThe h parameter matrix for this network is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-77-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-77-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-77-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-77-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-77-2.png"> | |
| 5382. |
To realize following function 'f'How many minimum number of 2 input NAND gates are required? |
| A. | 3 |
| B. | 6 |
| C. | 4 |
| D. | 10 |
| Answer» E. | |
| 5383. |
A uniform plane wave in air with H = 3 sin ( t - 8x)uzA/m is incident normally on a region with = 0, r = 1, r = 9. The reflection coefficient is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-15-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-56-3.94-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-15-2.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-15-3.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-56-3.94-2.png"> | |
| 5384. |
If (10) x x(10)x = (100)x; (100)x x (100)x = (10000)x then x can take value |
| A. | 2 |
| B. | 5 |
| C. | 10 |
| D. | All |
| Answer» E. | |
| 5385. |
A rectangular wave guide is designed to propagate at the dominant mode TE10 at a frequency of 5 GHz. The cut-off frequency is 0.8 of signal frequency. The ratio of the guide width to height is 2. The dimensions of the guide are |
| A. | 3.75 cm, 1.875 cm |
| B. | 4 cm, 2 cm |
| C. | 8 cm, 4 cm |
| D. | 2.54 cm, 1.27 cm |
| Answer» B. 4 cm, 2 cm | |
| 5386. |
Figure shows four D type FFs are connected as a shift register using an XOR gate. The initial state and 3 subsequent states for 3 clock pulses are also givenThe state QA QB QC QD after the 4th clock pulse is |
| A. | 0000 |
| B. | 1111 |
| C. | 1001 |
| D. | 1000 |
| Answer» E. | |
| 5387. |
The Z transform of a particular signal is given as The practical implementation of the system will be |
| A. | non causal and stable |
| B. | causal and stable |
| C. | unstable and noncausal |
| D. | can't say |
| Answer» C. unstable and noncausal | |
| 5388. |
Determine the voltage VCB in the circuit below: |
| A. | 3.4 V |
| B. | 5.4 V |
| C. | 7.4 V |
| D. | 9.4 V |
| Answer» D. 9.4 V | |
| 5389. |
In a series LCR circuit the maximum inductor voltage is twice the maximum capacitor voltage however current lags by 30 and drop across the inductance is vL = 100 sin 377t V. Assuming the resistance being 20 , Find the values of the capacitance and inductance. |
| A. | 235 F, 61.18 H |
| B. | 230 F, 61.18 H |
| C. | 61.18 F, 230 H |
| D. | None of the above |
| Answer» C. 61.18 F, 230 H | |
| 5390. |
In 8085 microprocessor based system running at 3 MHz clock frequency what should be the minimum pulse width of the INTR signal, so that it is recognized successfully? |
| A. | 0.33 s |
| B. | 0.666 s |
| C. | 5.8 s |
| D. | none of these |
| Answer» D. none of these | |
| 5391. |
The reduced form of the functionX(E, A, B, C, D) = (0, 1, 2, 3, 4, 7, 8, 9, 10, 12, 15, 16, 17, 18, 19, 20, 23, 24, 25, 26, 28, 31) is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-39-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-39-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-39-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-39-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-39-2.png"> | |
| 5392. |
Consider the probability density f(x) = ae-b|x| where x is a random variable whose allowable values range from x = - to x = + . The Cdf (Cumulative distribution function) for x 0 is : |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-02-28-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-02-28-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-02-28-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-02-28-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-02-28-3.png"> | |
| 5393. |
The electric field of uniform plane wave is given by E = 20 sin (2 p x 108t- pz) x + 20 cos (2 p x 108t - pz) y. The corresponding magnetic field is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-06-78-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-06-78-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-06-78-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-06-78-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-06-78-4.png"> | |
| 5394. |
Find I for circuit shown below |
| A. | 3 A |
| B. | 1 A |
| C. | 2 A |
| D. | 0 A |
| Answer» D. 0 A | |
| 5395. |
NMOS devices have __________ switching speeds and __________ on-state resistance; as compared with PMOS devices. |
| A. | slower, higher |
| B. | faster, lower |
| C. | faster, higher |
| D. | slower, lower |
| Answer» C. faster, higher | |
| 5396. |
What is the frequency of pulse at the points a, b, c in the circuit? |
| A. | 3 MHz |
| B. | 7.8 KHz |
| C. | 10 KHz |
| D. | 1 MHz |
| Answer» C. 10 KHz | |
| 5397. |
The impulse response h(t) of a linear invariant continuous time system is given by h(t) = exp (- 2t) u(t), where u(t) denotes the unit step function. The frequency response H( ) of this system in terms of angular frequency is given by H( ) |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-10-84-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-10-84-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-10-84-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-10-84-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-10-84-4.png"> | |
| 5398. |
The transfer characteristic for the precision rectifier circuit shown below is (assume ideal OP-AMP and practical diodes) |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-04-38-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-04-38-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-04-38-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-04-38-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-04-38-3.png"> | |
| 5399. |
Find 'X' in the circuit below:f1(A, B, C, D) = (6, 7, 13, 14);f2(A, B, C, D) = (3, 6, 7);f3(A, B, C, D) = (5, 6, 7, 14, 15) |
| A. | (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15) |
| B. | 0 |
| C. | (14) |
| D. | 1 |
| Answer» D. 1 | |
| 5400. |
In the following circuit , the comparator output in log: "I" if V1 > V2 and is logic "0" otherwise. The D/A conversion is done as per the relations VDAC = 2n-2 Volts, where b3 (MSB), b2, b1 and b0 (LSB) are the counter outputs. The counter starts from the clear stateThe stable reading of the LED display is |
| A. | 06 |
| B. | 07 |
| C. | 12 |
| D. | 13 |
| Answer» E. | |