MCQOPTIONS
Saved Bookmarks
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.
| 5151. |
How many number of branches the root loci of the equation s(s + 2)(s + 3) + K(s + 2) = 0 have? |
| A. | Zero |
| B. | One |
| C. | Two |
| D. | Three |
| Answer» E. | |
| 5152. |
Which of the following uses 'transferred electron effect' for production of microwaves? |
| A. | Silicon |
| B. | Germanium |
| C. | Metal-semiconductor junction |
| D. | Gallium Arsenide |
| Answer» E. | |
| 5153. |
The figures shows the symbol of |
| A. | p channel depletion MOSFET |
| B. | p channel enhancement MOSFET |
| C. | complementary MOSFET |
| D. | p channel JFET |
| Answer» B. p channel enhancement MOSFET | |
| 5154. |
The spectral range of a band pass signal extends from 10 MHz to 10.4 MHz. What is the minimum sampling frequency required for reconstruction? |
| A. | 20 MHz |
| B. | 20.8 MHz |
| C. | 20.4 MHz |
| D. | 0.8 MHz |
| Answer» E. | |
| 5155. |
In 8085 microprocessor, the interrupt enable flip-flop is reset by |
| A. | DI instruction only |
| B. | system RESET only |
| C. | interrupt acknowledgment only |
| D. | all of the above |
| Answer» E. | |
| 5156. |
Which of the following devices is used in the microprocessors? |
| A. | JFET |
| B. | BJT |
| C. | MOSFET |
| D. | CMOS |
| Answer» E. | |
| 5157. |
A 2 bit binary multiplier can be implemented using |
| A. | 2 inputs ANDs only |
| B. | 2 inputs XORs and 4 input AND gates only |
| C. | Two 2 inputs NORs and one XNOR gate |
| D. | XOR gates and shift registers |
| Answer» D. XOR gates and shift registers | |
| 5158. |
Which one of the following circuits is used for converting a sine wave into a square wave? |
| A. | Astable multivibration |
| B. | Monostable multivibration |
| C. | Bistable multivibration |
| D. | Schmitt trigger |
| Answer» E. | |
| 5159. |
Which of the following has a major role in implementation of functions calls in C? |
| A. | Processor's registers |
| B. | Data segment |
| C. | The heap |
| D. | System stack |
| Answer» E. | |
| 5160. |
Effective Q of the equivalent electrical circuit of quartz crystal is of the order of |
| A. | 200 |
| B. | 2000 |
| C. | 20000 |
| D. | 200000 |
| Answer» D. 200000 | |
| 5161. |
Two linearly polarized plane waves A and B travelling in free space in the positive x direction meet at a point. Wave A is polarized in the y direction and the wave B is polarized in the z direction. If the two waves are of equal amplitude and are in phase quadrature, the resultant wave will be |
| A. | circularly polarized |
| B. | elliptically polarized |
| C. | linearly polarized |
| D. | vertically polarized |
| Answer» B. elliptically polarized | |
| 5162. |
Consider the following statements regarding an antenna: It is a transducerIts performance is essentially frequency sensitiveIt is a reciprocal deviceWith increase in its effective aperture area, width of the radiated beam increases. Which of the above statements are correct? |
| A. | 1, 2 and 3 |
| B. | 1, 2 and 4 |
| C. | 2 and 3 only |
| D. | 1 and 4 only |
| Answer» B. 1, 2 and 4 | |
| 5163. |
The range of memory location in given memory interfacing scheme is |
| A. | 0000H - 07FFH |
| B. | F800H - FFFFH |
| C. | 0000H - 03FFH |
| D. | 0000H - 3FFFH |
| Answer» C. 0000H - 03FFH | |
| 5164. |
Consider the CMOS circuit shown, where the gate voltage VG of the n-MOSEFT is increased from zero, while the gate voltage of the p-MOSFET is kept constant at 3 V. Assume that, for both transistor, the magnitude of the threshold voltage is 1 V and the product of the transconductor parameter and the (W/L) ratio, i.e. the quality C0x(W/L), is 1mA. V-2.For small increase in VG beyond IV, which of the following gives the correct description of the region of operation of each MOSFET? |
| A. | Both the MOSFET are in saturation region |
| B. | Both the MOSFET are in triode region |
| C. | n-MOSFET is in triode and p-MOSFET is in saturation region |
| D. | n-MOSFET is in saturation and p-MOSFET is in triode region |
| Answer» B. Both the MOSFET are in triode region | |
| 5165. |
In a digital voltmeter the oscillator frequency is 400 kHz and the ramp voltage falls from 8 V to 0 V in 20 ms. What is the number of pulses counted by the counter? |
| A. | 800 |
| B. | 2000 |
| C. | 4000 |
| D. | 8000 |
| Answer» E. | |
| 5166. |
Which of the following antennas uses a number of varying length parallel elements? |
| A. | Helical antenna |
| B. | Pyramidal Horn |
| C. | Comer reflection antenna |
| D. | Yagi-Uda antenna |
| Answer» E. | |
| 5167. |
What was the first commercial geostationary communication satellite? |
| A. | INTELSAT 1 |
| B. | ECHO |
| C. | INSAT-1A |
| D. | SPUTNIK |
| Answer» B. ECHO | |
| 5168. |
Assertion (A): The small signal analysis of a transistor amplifier is done to obtain the current gain, voltage gain and the conversion efficiency of an amplifier.Reason (R): The small signal analysis of a transistor amplifier uses the small signal parameters of the transistor. |
| 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» E. | |
| 5169. |
Average power for (t)dt signal is __________ . |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/10-03-28-1.png"> |
| B. | 1 |
| C. | 0 |
| D. | |
| Answer» B. 1 | |
| 5170. |
Consider the following, logic diagram :The count sequence of the above logic diagram is : |
| A. | 0000 to 1111 |
| B. | 0000 to 1001 |
| C. | 0000 to 1010 |
| D. | 1001 to 0000 |
| Answer» C. 0000 to 1010 | |
| 5171. |
Which of the following is not an electromagnetic device? |
| A. | Hall transducer |
| B. | Transformer |
| C. | Speedometer |
| D. | Eddy current damping device |
| Answer» B. Transformer | |
| 5172. |
Assertion (A): Cut-in voltage for Germanium diode is greater than that for silicon diode.Reason (R): Germanium diode has a higher reverse saturation current than silicon diode. |
| 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» E. | |
| 5173. |
Laplace transform of unit triplet function is __________ . |
| A. | 1 |
| B. | <i>s</i> |
| C. | <i>s</i> |
| D. | <sup>2</sup> |
| E. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-05-67-4.png"> |
| Answer» D. <sup>2</sup> | |
| 5174. |
The pole-zero plot given below corresponds to a |
| A. | low pass filter |
| B. | high pass filter |
| C. | band pass filter |
| D. | notch filter |
| Answer» D. notch filter | |
| 5175. |
The Gain margin for the system with open loop transfer function : |
| A. | |
| B. | 0 |
| C. | 1 |
| D. | - |
| Answer» B. 0 | |
| 5176. |
In the circuit shown, what value of RL maximizes the power delivered to RL? |
| A. | 2.4 |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-29-2.png"> |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 5177. |
The pre-emphasis in FM aids in providing extra noise immunity by |
| A. | emphasizing only the higher frequency components |
| B. | emphasizing the entire frequency band |
| C. | emphasizing only the lower frequency band |
| D. | cutting down the low frequency noise |
| Answer» D. cutting down the low frequency noise | |
| 5178. |
A junction FET, can be used as a voltage variable resistor |
| A. | at pinch-off condition |
| B. | beyond pinch-off voltage |
| C. | well below pinch-off condition |
| D. | for any value of V |
| E. | <sub>DS</sub> |
| Answer» D. for any value of V | |
| 5179. |
Consider an SSB signal when the modulating signal is x(t). Let x(t) represents the complex conjugate of x(t) and is its Hilbert transform. The envelope of SSB signal is: |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-01-4-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-01-4.png"> |
| C. | <i>x(t)</i> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-01-4-4.png"> |
| Answer» E. | |
| 5180. |
Consider two independent random variables x and y with identical distributions. The variables X and Y take 0, 1 and2 with probabilities and respectively. What is the conditional probability P(X + Y = 2| X - Y = 0)? |
| A. | 0 |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-21-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-21-3.png"> |
| D. | 1 |
| Answer» D. 1 | |
| 5181. |
Which of the following is not a conducting material? |
| A. | Copper |
| B. | Tungsten |
| C. | Germanium |
| D. | Platinum |
| Answer» D. Platinum | |
| 5182. |
The time domain behaviour of an RL circuit is represented L + Ri = V0 (1 + Be-Rt/L sint)u(t)For an initial current of i(0) = , the steady state value of the current is given by |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-30-2.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-30-3.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-30-4.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-30-5.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-03-30-3.png"> | |
| 5183. |
The figure below shows a long infinite length conduction placed as shown. Current flowing in a conductor is 2 amps. Then magnetic field at point A is: |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-748-63-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-748-63-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-748-63-3.png"> |
| D. | No magnetic field |
| Answer» D. No magnetic field | |
| 5184. |
Consider the following statements regarding the class-B power amplifiers (Complementary symmetry type): The efficiency of the amplifier is higher than that of class-A amplifierThe power output is lowCrossover distortion is presentThe standby power dissipation is absent. Which of the above statements are correct? |
| A. | 1, 2 and 3 |
| B. | 1, 2 and 4 |
| C. | 1, 3 and 4 |
| D. | 2, 3 and 4 |
| Answer» D. 2, 3 and 4 | |
| 5185. |
For a Hertz dipole antenna, the Half Power Beam Width (HPBW) in the E-plane is |
| A. | 360 |
| B. | 180 |
| C. | 90 |
| D. | 45 |
| Answer» C. 90 | |
| 5186. |
Consider the following statements:For a 10 m long common power line connecting a switch to a light bulb It is a distributed circuit.Time delay for propagation through it is negligible.It is the form of a shielded coaxial cable of circular cross-section.As the intensity of the lamp varies, input impedance of this line also changes. Which of the above statements is/are correct? |
| A. | 1 only |
| B. | 1 and 2 |
| C. | 2 and 3 |
| D. | 2 and 4 |
| Answer» D. 2 and 4 | |
| 5187. |
The equivalent of the block diagram in figure is given in |
| A. | Figure (a) |
| B. | Figure (b) |
| C. | Figure (c) |
| D. | Figure (d) |
| Answer» E. | |
| 5188. |
Consider the following statements: Acceptor level is formed very close to the conduction band.The effective mass of the free electron is same as that of a hole.The magnitude of the charge of a free electron is same as that of a hole.Addition of donor impurities adds holes to the semiconductor. Which of the above statements are correct? |
| A. | 1 and 3 |
| B. | 2 and 3 |
| C. | 2 and 4 |
| D. | 3 and 4 |
| Answer» C. 2 and 4 | |
| 5189. |
The following properties are associated with ferroelectric materials: Its susceptibility is negative.The susceptibility is expressed aswhere c is the Curie constant and Tc is the Curie temperature.It has permanent dipoles oriented randomly. Which of the above statements is/are correct? |
| A. | 1 only |
| B. | 1 and 3 |
| C. | 2 only |
| D. | 1, 2 and 3 |
| Answer» D. 1, 2 and 3 | |
| 5190. |
There are four different algorithms A1, A2, A3 and A4 to solve, a given problem with the complexity order log(n), log(log(n)), n log and n/log(n) respectively. Which is the best algorithm? |
| A. | A1 |
| B. | A2 |
| C. | A3 |
| D. | A4 |
| Answer» C. A3 | |
| 5191. |
Consider the following statements:For a master-slave J-K flip-flop, the toggle frequency is the maximum clock frequency at which the flip-flop will toggle reliably.the data input must precede the clock triggering edge transition time by time minimum time.the data input must remain fixed for a given time after, the clock triggering edge transition time for reliable operation.propagation delay time is equal to the rise time and fall time of the data. Which of the above statements is/are correct? |
| A. | 1, 2 and 3 |
| B. | 1 and 2 only |
| C. | 2 and 3 only |
| D. | 3 and 4 only |
| Answer» B. 1 and 2 only | |
| 5192. |
In Quine-Mclusky method of Boolean function reduction; __________ , are treated as __________ and therefore discrepancies may occur in the final solution, therefore this method is not applicable to the functions with __________ . |
| A. | zeros, don't care conditions, zeros |
| B. | one's, don't care conditions, one's |
| C. | don't care conditions, zeros, don't care conditions |
| D. | don't care conditions, don't care conditions, don't care conditions |
| Answer» D. don't care conditions, don't care conditions, don't care conditions | |
| 5193. |
A message signal x(t) is amplitude modulated with carrier c(t). x(t) = 2 sin 600pt c(t) = 8 cos (2p x 106 t) such that the modulated signal is (8 + 2 sin 600pt) [cos 2p x 106 t] The total side band power is: |
| A. | 2 |
| B. | 3 |
| C. | 1 |
| D. | 0.5 |
| Answer» D. 0.5 | |
| 5194. |
Simplify : A + B + A B + (A + B)AB + C(B + AB) |
| A. | <span style="text-decoration:overline;">B</span> |
| B. | + A |
| C. | <i>C</i> |
| D. | <span style="text-decoration:overline;">C</span> |
| E. | 1 |
| Answer» B. + A | |
| 5195. |
Which one of the following driving point functions does not represent an LC network? |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-04-58-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-04-58-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-04-58-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-04-58-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/8-04-58-2.png"> | |
| 5196. |
For the BJT shown in figure, = 50, the value of VCE is: |
| A. | 3.13 V |
| B. | 4.24 V |
| C. | 5.18 V |
| D. | none |
| Answer» E. | |
| 5197. |
An average response rectifier type electronic voltameter has a d.c. voltage of 10 V applied to it. What is the meter reading? |
| A. | 7.1 V |
| B. | 10 V |
| C. | 11.1 V |
| D. | 22.2 V |
| Answer» D. 22.2 V | |
| 5198. |
Manganin, an alloy of copper and manganese, is used in |
| A. | Soldering material |
| B. | Heating elements |
| C. | Ballast resistors |
| D. | Standard resistances |
| Answer» E. | |
| 5199. |
Which of the following antenna is obtained by modifying a waveguide? |
| A. | Microstrip Antenna |
| B. | Helical Antenna |
| C. | Horn Antenna |
| D. | Dipole Antenna |
| Answer» D. Dipole Antenna | |
| 5200. |
Which of the following stages has no phase inversion of the signal? |
| A. | Two CE stages |
| B. | Three CE stages |
| C. | CE and CC stages |
| D. | CE stage and emitter follower |
| Answer» B. Three CE stages | |