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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.
| 5101. |
For real and odd signals, the Fourier series coefficient ak is __________ . |
| A. | purely imaginary and even |
| B. | purely real and even |
| C. | purely imaginary and odd |
| D. | purely real and odd |
| Answer» D. purely real and odd | |
| 5102. |
What will be equipotential surfaces for a pair of equal and opposite line charges? |
| A. | Spheres |
| B. | Concentric cylinders |
| C. | Non-concentric cylinders |
| D. | None of the above |
| Answer» D. None of the above | |
| 5103. |
With respect to the differential amplifier configuration shown below, the differential gain Ad will be Rc = 4.7 K RE = 2.7 K hfe = 100hie = 1 K RS = 100 |
| A. | 273.63 |
| B. | 213.63 |
| C. | 113.63 |
| D. | 233.63 |
| Answer» C. 113.63 | |
| 5104. |
Method of images is applicable to which fields? |
| A. | Electrostatic fields only |
| B. | Electrodynamic fields only |
| C. | Neither electrostatic fields nor electro-dynamic fields |
| D. | Both electrostatic fields and electro-dynamic fields |
| Answer» B. Electrodynamic fields only | |
| 5105. |
Who developed the concept of time varying electric field producing a magnetic field? |
| A. | Gauss |
| B. | Faraday |
| C. | Hertz |
| D. | Maxwell |
| Answer» C. Hertz | |
| 5106. |
The magnitude of frequency response of an underdamped second order system is 5 at 0 rad/sec and peaks to at 52rad/sec. The transfer function of the system is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-05-42-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-05-42-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-05-42-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-05-42-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-05-42-2.png"> | |
| 5107. |
Identification of highest priority interrupt can be achieved in a minimum time by which of the following schemes? |
| A. | Hardwired polling |
| B. | Priority encode circuit |
| C. | Software polling |
| D. | Subdivision of interrupt register into a number of sub registers which are checked parallely |
| Answer» B. Priority encode circuit | |
| 5108. |
A super heterodyne receiver has an input circuit tuned to a 570 KHz signal. If the intermediate frequency of the amplifier is tuned to 455 KHz. The quality factor Q for a Image Rejection ratio of 125? |
| A. | 100 |
| B. | 56.81 |
| C. | 42.74 |
| D. | 87 |
| Answer» C. 42.74 | |
| 5109. |
The antenna most commonly used for TV broadcasting in the UHF band is |
| A. | turnstile antenna |
| B. | dipole antenna |
| C. | yagi antenna |
| D. | rhombic antenna |
| Answer» D. rhombic antenna | |
| 5110. |
Consider the transmission line of length 37.5 cm, which is terminated into zero resistance. This line is being exited by a source of 1 GHz which has an internal impedance of 50 . What is the input impedance of the line as seen by the source? |
| A. | 50 |
| B. | Zero |
| C. | 100 |
| D. | Infinite |
| Answer» E. | |
| 5111. |
Efficiency of general AM signal with em = E1 cos 1t + E2 cos 2t with modulation index m1 and m2 is __________ . |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/2-757-52-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/2-757-52-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/2-757-52-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/2-757-52-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/2-757-52-3.png"> | |
| 5112. |
A random process x(t) is defined by x(t) = 2 cos (2pt + Y) where Y is a discrete random variable withP(Y = 0) = and Then Rxx (0, 1) = |
| A. | 1 |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-02-17.png"> |
| C. | 2 |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-02-23-4.png"> |
| Answer» E. | |
| 5113. |
What does a link budget for satellite communication include? |
| A. | Total cost of satellite |
| B. | Cost of satellite plus launch vehicle |
| C. | Signal and noise levels is dB |
| D. | Margins of error permitted |
| Answer» D. Margins of error permitted | |
| 5114. |
What is the characteristic of a good control system? |
| A. | Sensitive to parameter variation |
| B. | Insensitive to input command |
| C. | Neither sensitive to parameter variation nor sensitive to input commands |
| D. | Insensitive to parameter variation but sensitive to input commands |
| Answer» E. | |
| 5115. |
What is the minimum value of VSWR that may exist on a transmission line? |
| A. | Less than zero |
| B. | Zero |
| C. | One |
| D. | 10 |
| Answer» D. 10 | |
| 5116. |
Assertion (A): For same drain current rating N-channel MOSFET occupies more area than p-channel MOSFET.Reason (R): Electron mobility is much higher than hole mobility. |
| 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. | |
| 5117. |
Poynting vector is associated with |
| A. | flux in magnetic field |
| B. | power flow in electrostatic field |
| C. | current in electrostatic field |
| D. | charge in electrostatic field |
| Answer» C. current in electrostatic field | |
| 5118. |
Consider points P and Q in the x-y plane, with P = (1, 0) and Q = (0, 1). The line integral 2 (xdx + ydy) along the semicircle with the line segment PQ as its diameter |
| A. | is - 1 |
| B. | is 0 |
| C. | is 1 |
| D. | depends on the direction (clockwise or anti-clockwise) of the semicircle |
| Answer» C. is 1 | |
| 5119. |
Which of the transistor models is most preferred for the analysis of a transistor circuit both at mid-band and at high frequencies? |
| A. | h-parameter model |
| B. | y-parameter model |
| C. | s-parameter model |
| D. | hybrid-p model |
| Answer» E. | |
| 5120. |
Which one of the following materials is used for making permanent magnets? |
| A. | Steel |
| B. | Carbon |
| C. | Carbon-Steel |
| D. | Graphite |
| Answer» D. Graphite | |
| 5121. |
The circuit shown depicts : |
| A. | voltage series negative feedback |
| B. | voltage shunt negative feedback |
| C. | current series negative feedback |
| D. | current shunt negative feedback |
| Answer» E. | |
| 5122. |
Consider the following statements:For a square waveguide of cross-section 3m x 3m it has been found At 6 GHz dominant mode will propagateAt 4 GHz only dominant modes and evanescentAt 11 GHz all the modes and no higher order mode will propagateAt 7 GHz degenerate modes will propagate Which of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 1, 2 and 4 |
| C. | 2 and 3 only |
| D. | 2, 3 and 4 |
| Answer» B. 1, 2 and 4 | |
| 5123. |
The output y(t) of a continuous-time system S for the input x(t) is given by:Which of the following is incorrect? |
| A. | S is linear and time-invariant |
| B. | S is linear and time-varying |
| C. | S is non-linear and time-invariant |
| D. | S is non-linear and time-varying |
| Answer» B. S is linear and time-varying | |
| 5124. |
What are the counting stages (Q1, Q2) for the counter shown in the figure below? |
| A. | 11, 10, 00, 11, 10, ... |
| B. | 01, 10, 11, 00, 10, ... |
| C. | 00, 11, 01, 10, 00, ... |
| D. | 01, 10, 00, 01, 10, ... |
| Answer» B. 01, 10, 11, 00, 10, ... | |
| 5125. |
For the circuit shown in the given figure, assuming ideal op-amps, the output corresponding to the given input will be : |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-02-22-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-03-22-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-03-22-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-03-22-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/15-03-22-2.png"> | |
| 5126. |
A memory system of size 16 K bytes is required to be designed using memory chips having 12 address lines and 4 data lines-each. The number of such chips required to design and the memory system is : |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 16 |
| Answer» D. 16 | |
| 5127. |
The measured transconductance gm of an NMOS transistor operating in the linear region is plotted against the gate voltage VG at constant drain voltage VD. Which of the following figures represents the expected dependance of gm on VG? |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-06-45-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-06-45-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-06-45-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-06-45-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-06-45-4.png"> | |
| 5128. |
Consider the following statements regarding the properties of an R-L-C series circuit under resonance: Current in the circuit is in phase with applied voltageVoltage drop across capacitor C and inductance L are equal in magnitude.Voltage across the capacitor is equal in magnitude to the applied voltage.Current in the circuit is maximum. Which of the above statements is/are correct? |
| A. | 1 only |
| B. | 1, 2 and 4 |
| C. | 2 and 4 |
| D. | 1, 3 and 4 |
| Answer» C. 2 and 4 | |
| 5129. |
Which of the following devices is used at the first stage of an electronic voltmeter? |
| A. | BJT |
| B. | SCR |
| C. | MOSFET |
| D. | UJT |
| Answer» D. UJT | |
| 5130. |
In the graph shown in the figure, for the tree with branches b, d and f the fundamental loops would include c |
| A. | <i>abf, def, bdea</i> |
| B. | <i>bdc, def, fba</i> |
| C. | <i>abde, def, cdb</i> |
| D. | <i>cea, bdea, abbf</i> |
| Answer» C. <i>abde, def, cdb</i> | |
| 5131. |
Which one of the following is a transferred electron device? |
| A. | BARITT diode |
| B. | IMPATT diode |
| C. | TRAPATT diode |
| D. | Gunn diode |
| Answer» E. | |
| 5132. |
Assertion (A): A fixed bias BJT circuit exhibits better performance as compared to a self bias BJT circuit.Reason (R): A fixed bias BJT circuit used less components as compared to a self bias BJT circuit. |
| 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. | |
| 5133. |
The signal cos ct + 0.5 cos mt sin ct is |
| A. | FM only |
| B. | AM only |
| C. | both AM & FM |
| D. | neither AM nor FM |
| Answer» C. both AM & FM | |
| 5134. |
The circuit shown below is the equivalent circuit of which one of the following microwave resonator types? |
| A. | Butterfly resonator |
| B. | Parallel-wire resonator |
| C. | Cavity resonator |
| D. | Coaxial line resonator |
| Answer» B. Parallel-wire resonator | |
| 5135. |
Period of the signal is: |
| A. | 8 |
| B. | 1 |
| C. | 24 |
| D. | 16 |
| Answer» D. 16 | |
| 5136. |
Consider the cascade structure of two filters. Consider the following statements. If f1 < f2 then it acts like band-pass filterIf f1 < f2 then it acts like band-pass only if HPF follows LPF in other case it acts like a band stop filterIf f1 > f2 then it acts all stop filter The correct statements are: |
| A. | 1 and 3 |
| B. | only 2 |
| C. | 2 and 3 |
| D. | only 3 |
| Answer» B. only 2 | |
| 5137. |
Which of the following does not apply to Yagi-Uda antenna |
| A. | High gain |
| B. | Reasonably good bandwidth |
| C. | Folded dipole |
| D. | Parasitic elements |
| Answer» C. Folded dipole | |
| 5138. |
The transfer function of a linear-time invariant system is given as What is the steady-state value of the unit-impulse response? |
| A. | Zero |
| B. | One |
| C. | Two |
| D. | Infinite |
| Answer» B. One | |
| 5139. |
Which of the following is a circularly polarized antenna? |
| A. | Horn |
| B. | Dipole |
| C. | Helical |
| D. | Pyramidal |
| Answer» D. Pyramidal | |
| 5140. |
As per Hall effect, if any specimen carrying a current I is applied in a transverse magnetic field B, then an electric field E is induced in the specimen in the direction. |
| A. | parallel to I |
| B. | perpendicular to B and parallel to I |
| C. | parallel to I and B |
| D. | perpendicular to both I and B |
| Answer» E. | |
| 5141. |
For determining the network functions of a two-port network, it is required to consider that |
| A. | all initial conditions remain same |
| B. | all initial conditions are zero |
| C. | part of initial conditions are equal to zero |
| D. | initial conditions vary depending on nature of network |
| Answer» C. part of initial conditions are equal to zero | |
| 5142. |
How many distinct binary trees can be constructed with three nodes? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» E. | |
| 5143. |
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. Estimate the output voltage V0 for VG = 1.5 V. [Hint: Use the approximate current voltage equation for each MOSEFT |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-06-58-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-06-58-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-06-58-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-06-58-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-06-58-3.png"> | |
| 5144. |
Radiation efficiency of an antenna is defined as the ratio of |
| A. | Total power radiated by an antenna to the net power accepted by the antenna from the connected transmitter |
| B. | The frequency at which minimum power is radiated to the frequency at which maximum power is radiated |
| C. | Total power accepted from the transmitter to total power generated by the transmitter |
| D. | Power in main lobe to that in the side lobe |
| Answer» B. The frequency at which minimum power is radiated to the frequency at which maximum power is radiated | |
| 5145. |
Which of the following factors are responsible to design IC logic gates to operated at a fixed supply voltage of 5 volts? Low heating of IC logic gatesCompatibility with other logic gatesSatisfactory and safe operationStandardization from IC manufacturing point of view. Select the correct answer from the codes given below: |
| A. | 1 only |
| B. | 2 only |
| C. | 2 and 3 |
| D. | 3 and 4 |
| Answer» D. 3 and 4 | |
| 5146. |
Which of the following meters requires an external power source for its operation? |
| A. | P.M.M.C. meter |
| B. | Hot wire ammeter |
| C. | Electronic voltmeter |
| D. | Electrodynamometer |
| Answer» D. Electrodynamometer | |
| 5147. |
The transfer function of a controller is given as Kp + Kd.s where Kp and Kd are constants. What type of controller is this? |
| A. | Proportional |
| B. | Proportional plus integral |
| C. | Proportional plus derivative |
| D. | Integral plus derivative |
| Answer» D. Integral plus derivative | |
| 5148. |
Compared to a p-n junction with NA = ND = 1014/cm3, which one of the following statements is TRUE for a p-n junction with NA = ND = 1020/cm3? |
| A. | Reverse breakdown voltage is lower and depletion capacitance is lower |
| B. | Reverse breakdown voltage is higher and depletion capacitance is lower |
| C. | Reverse breakdown voltage is lower and depletion capacitance is higher |
| D. | Reverse breakdown voltage is higher and depletion capacitance is higher |
| Answer» D. Reverse breakdown voltage is higher and depletion capacitance is higher | |
| 5149. |
Which of the following are universal gates? NANDNORXOR Select the correct answer from the codes given below: |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» B. 1 and 3 only | |
| 5150. |
Consider the following statements:To draw a.c. equivalent circuit of a transistors, all d.c. sources are shorteda.c. sources are shortedd.c. sources are openeda.c. sources are connected to d.c. sources Which of the above statements is/are correct? |
| A. | 2 and 4 |
| B. | 1 and 2 |
| C. | 1 only |
| D. | 3 and 4 |
| Answer» D. 3 and 4 | |