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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.
| 4851. |
The number of cells in a 4 variable K map is |
| A. | 16 |
| B. | 8 |
| C. | 4 |
| D. | 32 |
| Answer» B. 8 | |
| 4852. |
The circuit of the given figure is |
| A. | full adder |
| B. | full subtractor |
| C. | shift register |
| D. | decade counter |
| Answer» C. shift register | |
| 4853. |
A half adder adds |
| A. | 2 bits |
| B. | 3 bits |
| C. | 4 bits |
| D. | 2 or 3 bits |
| Answer» B. 3 bits | |
| 4854. |
The no. of comparators required in a 3 bit comparator type ADC is |
| A. | 2 |
| B. | 3 |
| C. | 7 |
| D. | 8 |
| Answer» D. 8 | |
| 4855. |
If the ladder reference voltage is 2 V, then minimum comparator resolution required is |
| A. | 0.125 V |
| B. | 1.25 V |
| C. | 12.5 V |
| D. | 0 |
| Answer» B. 1.25 V | |
| 4856. |
In a 7 segment LED display, the minimum number of segments is activated when the input decimal number is |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 4857. |
In a transmission line terminated with a load equal to the characteristic impedance, the reflection coefficient is |
| A. | 0 |
| B. | +1 |
| C. | -1 |
| D. | Infinity |
| Answer» B. +1 | |
| 4858. |
Consider the signal S(t) shown below :The slope of the matched filter output during the interval |
| A. | 8 |
| B. | 12 |
| C. | 16 |
| D. | 18 |
| Answer» B. 12 | |
| 4859. |
An electrical system and its signal-flow graph representation are shown in figure (a) and (b) respectivelyThe values of G2 and H, respectively are |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-01-4-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-01-4-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-01-4-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-01-4-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-01-4-2.png"> | |
| 4860. |
Consider the following program segment written for 8085 based system LXI SP, FFFFHMVI A, FFHMOV BB, AK: DCR BPUSH HLJNZ KINR ALXI H, FFCEHCPI 20HLHLDThe contents of accumulator is : |
| A. | CE |
| B. | 20 |
| C. | indeterminate |
| D. | none of these |
| Answer» D. none of these | |
| 4861. |
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 transmission through this circuit? |
| A. | 0.40 |
| B. | 0.20 |
| C. | 0.27 |
| D. | 0.54 |
| Answer» D. 0.54 | |
| 4862. |
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 magnitude of the error between VDAC and Vin at steady state in volts is |
| A. | 0.2 |
| B. | 0.3 |
| C. | 0.5 |
| D. | 1.0 |
| Answer» D. 1.0 | |
| 4863. |
The signal flow graph of a system is shown below:The state variable representation of the system can be |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-06-50-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-06-50-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-06-50-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-06-50-4.png"> |
| Answer» E. | |
| 4864. |
Find equivalent capacitance if each capacitance is 2 F. |
| A. | 5/12 F |
| B. | 12/5 F |
| C. | 6/5 F |
| D. | 5/6 F |
| Answer» C. 6/5 F | |
| 4865. |
EPROM can be |
| A. | UVPROM |
| B. | EEPROM |
| C. | both UVPROM and EEPROM |
| D. | none of the above |
| Answer» D. none of the above | |
| 4866. |
A multilevel decoder is more costly as compared to single level decoder. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4867. |
A full subtractor has a total of |
| A. | 2 inputs |
| B. | 3 inputs |
| C. | 4 inputs |
| D. | 5 inputs |
| Answer» C. 4 inputs | |
| 4868. |
The function of interface circuit is |
| A. | to match output conditions of driver with input conditions of load device |
| B. | to match output conditions of load device with input conditions of driver |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» B. to match output conditions of load device with input conditions of driver | |
| 4869. |
Octal number 12 is equal to decimal number |
| A. | 8 |
| B. | 9 |
| C. | 10 |
| D. | 11 |
| Answer» D. 11 | |
| 4870. |
Hexadecimal number E is equal to binary number |
| A. | 1110 |
| B. | 1101 |
| C. | 1001 |
| D. | 1111 |
| Answer» B. 1101 | |
| 4871. |
Decimal number 46 in excess 3 code = |
| A. | 1000 1001 |
| B. | 0111 1001 |
| C. | 0111 1111 |
| D. | 1000 1111 |
| Answer» C. 0111 1111 | |
| 4872. |
Logic hardware is available only in NAND and NOR. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4873. |
A 4 input AND gate is equivalent to |
| A. | 4 switches in parallel |
| B. | 2 switches in series and 2 in parallel |
| C. | three switches in parallel and one in series |
| D. | 4 switches in series |
| Answer» E. | |
| 4874. |
Determine the potential difference between the points A and B in the steady state |
| A. | 40 V |
| B. | 60 V |
| C. | 25 V |
| D. | 75 V |
| Answer» E. | |
| 4875. |
Find the value of K and velocity constant Kv so that the maximum overshoot in the unit step response is 0.2 and the peak time is 1 sec. |
| A. | 12.37, 0.175 |
| B. | 12.86, 2.175 |
| C. | 11.36, 1.175 |
| D. | 1.86, 0.175 |
| Answer» B. 12.86, 2.175 | |
| 4876. |
The transfer function of a discrete time LTI system is given byConsider the following statements:S1: The system is stable and causal for ROC: |z| > 1/2S2: The system is stable but not causal for ROC: |z| < 1/4S3: The system is neither stable nor causal for ROC: 1/4 < |z| < 1/2Which one of the following statements is valid? |
| A. | Both S1 and S2 are true |
| B. | Both S2 and S3 are true |
| C. | Both S1 and S3 are true |
| D. | S1, S2 and S3 are all true |
| Answer» D. S1, S2 and S3 are all true | |
| 4877. |
The logic function implemented by the following circuit at the terminal OUT is |
| A. | P NOR Q |
| B. | P NAND Q |
| C. | P OR Q |
| D. | P AND Q |
| Answer» E. | |
| 4878. |
If the L.T. of the voltage across a capacitor of value 1/3 F is , then the value of the current through the capacitor at t = 0+ is |
| A. | 0 |
| B. | 1 |
| C. | 1/3 |
| D. | |
| Answer» D. | |
| 4879. |
Two phasors having rms values V1 and V2 which are added to give a phasor having rms value V3. V3 is maximum if phase angle between V1 and V2 is |
| A. | 90 |
| B. | 180 |
| C. | 270 |
| D. | 360 |
| Answer» E. | |
| 4880. |
A current of 1 A in the coil of an iron cored electromagnet cause a flux density of 0.2.T. If the current is 2 A, B= |
| A. | 0.2 T |
| B. | 0.4 T |
| C. | 0.4 T or less |
| D. | 0.4 T or more |
| Answer» C. 0.4 T or less | |
| 4881. |
In figure, the current I4 is |
| A. | 10 0 |
| B. | 5 90 |
| C. | 5 270 |
| D. | 10 90 |
| Answer» C. 5 270 | |
| 4882. |
For the circuit shown in the figure, the current I is |
| A. | indeterminate due to indeterminate data |
| B. | zero |
| C. | 4 Amp |
| D. | 8 Amp |
| Answer» B. zero | |
| 4883. |
A sphere with charge Q was placed in, but not touching a larger hollow sphere. If there is any charge initially on the outer sphere; to remove it the outer sphere was earthed momentarily, and then the inner sphere was removed. The charge remaining on the outer sphere was then measured. This charge was found to be __________ to the charge on the inner sphere. |
| A. | equal and of same again |
| B. | equal and of opposite sign |
| C. | unequal and of same sign |
| D. | unequal and of opposite sign |
| Answer» C. unequal and of same sign | |
| 4884. |
At t = ; VR2 and VC will be |
| A. | 4, 4 |
| B. | 2, 4 |
| C. | 0, 2 |
| D. | 2, 0 |
| Answer» C. 0, 2 | |
| 4885. |
Laplace transform of {t cos at} is: |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-22-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-22-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-22-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-22-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-744-22-2.png"> | |
| 4886. |
The following series RLC circuit with zero initial conditions is excited by a unit impulse function (t).For t > 0, the output voltage Vc (t) is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-74-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-74-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-74-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-09-74-4.png"> |
| Answer» E. | |
| 4887. |
The magnitude plot of a rational transfer function G(s) with real coefficients is shown below. Which of the following compensators has such a magnitude plot? |
| A. | Lead compensator |
| B. | Lag compensator |
| C. | PID compensator |
| D. | Lead-lag compensator |
| Answer» E. | |
| 4888. |
The circuit shown in the figure converts |
| A. | BCD to Binary code |
| B. | Binary to excess - 3 code |
| C. | Excess - 3 to Gray |
| D. | Gray to Binary |
| Answer» E. | |
| 4889. |
Which of the following options is the closest in meaning to the world below:Circuitous |
| A. | cyclic |
| B. | indirect |
| C. | confusing |
| D. | crooked |
| Answer» C. confusing | |
| 4890. |
System is : |
| A. | causal |
| B. | stable |
| C. | non causal |
| D. | anticausal |
| Answer» B. stable | |
| 4891. |
In the following transistor circuit VBE = 0. 7 V, rc = 25mV/IE, and and the capacitance are very largeThe value of DC current IE is |
| A. | 1 mA |
| B. | 2 mA |
| C. | 5 mA |
| D. | 10 mA |
| Answer» B. 2 mA | |
| 4892. |
A certain JK FF has tpd = 12 nsec. The largest MOD counter that can be constructed from these FFs and still operate up to 10 MHz is |
| A. | any |
| B. | 8 |
| C. | 256 |
| D. | 10 |
| Answer» C. 256 | |
| 4893. |
When transient and steady state response require improvement; a __________ is used. |
| A. | Lead compensator |
| B. | Lag - Lead compensator |
| C. | Lag compensator |
| D. | Integrator |
| Answer» C. Lag compensator | |
| 4894. |
For the collector-feedback amplifier shown below the voltage gain Av will be __________ . |
| A. | -113.07 |
| B. | -103.07 |
| C. | -107.07 |
| D. | -93 |
| Answer» C. -107.07 | |
| 4895. |
A uniform plane magnetic wave incident normally on a plane surface of a dielectric material is reflected and the percentage of reflected power is 75% What is VSWR? |
| A. | 14 |
| B. | 1.4 |
| C. | 15 |
| D. | 13 |
| Answer» B. 1.4 | |
| 4896. |
Silicon is doped with boron to a concentration of 4 x 1017 atoms/cm3. Assuming the intrinsic carrier concentration of silicon to be 1.5 x 1010/cm3 and the value of to be 25mV at 300K. Compared to undoped silicon, the Fermi level of doped silicon |
| A. | goes down by 0.13 eV |
| B. | goes up by 0.13 eV |
| C. | goes down by 0.427 eV |
| D. | goes up by 0.427 eV |
| Answer» D. goes up by 0.427 eV | |
| 4897. |
The Fourier series of a real periodic function has only Cosine terms if it is evenSine terms if it is evenCosine terms if it is oddSine terms if it is odd Which of the above statements are correct? |
| A. | (1) and (4) |
| B. | (1) and (2) |
| C. | (2) and (4) |
| D. | (2) and (3) |
| Answer» B. (1) and (2) | |
| 4898. |
Power gain of antenna equals directive gain in VHF and UHF range if and only if efficiency of the antenna is __________ . |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 1 |
| Answer» E. | |
| 4899. |
If 137 + 276 = 435 how much is 731 + 672? |
| A. | 534 |
| B. | 1403 |
| C. | 1623 |
| D. | 1513 |
| Answer» D. 1513 | |
| 4900. |
An astable multivibrator circuit using IC 555 timer is shown below. Assume that the circuit is oscillating steadilyThe voltage Vc across capacitor varies between |
| A. | 3 V to 5 V |
| B. | 3 V to 6 V |
| C. | 3.6 V to 6 V |
| D. | 3.6 V to 5 V |
| Answer» C. 3.6 V to 6 V | |