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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.
| 5851. |
For a series R-L-C circuit tuned at resonant frequency which of the following statements is correct? |
| A. | The voltage across inductance is greater than applied voltage |
| B. | The voltage across capacitance is greater than applied voltage |
| C. | The voltage across both inductance and capacitance is greater than applied voltage |
| D. | The voltage across both inductance and capacitance is less than applied voltage |
| Answer» D. The voltage across both inductance and capacitance is less than applied voltage | |
| 5852. |
A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled, then the voltage across each resistor is |
| A. | half |
| B. | doubled |
| C. | increase by 4 times |
| D. | no change |
| Answer» E. | |
| 5853. |
Norton's theorem reduces a two terminal network to |
| A. | a constant current source and an impedance is parallel |
| B. | a constant current source and an impedance in series |
| C. | a constant voltage source and an impedance in parallel |
| D. | a constant voltage source and an impedance in series |
| Answer» B. a constant current source and an impedance in series | |
| 5854. |
If H(s) is positive real, 1/H(s) |
| A. | is positive real |
| B. | is not positive real |
| C. | may or may not be positive real |
| D. | must possess some other properties also if it is to be positive real |
| Answer» E. | |
| 5855. |
The phase difference between them is __________ degrees. |
| A. | 15 |
| B. | 50 |
| C. | 60 |
| D. | 105 |
| Answer» E. | |
| 5856. |
Open-circuit voltage is the potential difference between two point when the impedance between these points is |
| A. | zero |
| B. | infinity |
| C. | capacitive |
| D. | reactive |
| Answer» C. capacitive | |
| 5857. |
If each stage has a gain of 10 dB and noise figure of 10 dB, then the overall noise figure of a two stage cascade amplifier will be |
| A. | 10 |
| B. | 1.09 |
| C. | 1.0 |
| D. | 10.9 |
| Answer» E. | |
| 5858. |
A rectangular waveguide of internal dimensions (a = 4 cm and b = 3) is to be operated in TE11 mode. The minimum operating frequency is |
| A. | 6.25 GHz |
| B. | 6.0 GHz |
| C. | 5.0 GHz |
| D. | 3.75 GHz |
| Answer» B. 6.0 GHz | |
| 5859. |
Given L[f(t)] = and L[g(t)] = also h(t) = , where, x = then, L[h(t)] = __________ . |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-789-52-5.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-789-52-6.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-789-52-7.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-789-52-8.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/4-789-52-6.png"> | |
| 5860. |
The voltage reflection coefficient on a 50 line is 0.7 30 .The load impedance is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-30-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-30-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-30-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-30-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-30-3.png"> | |
| 5861. |
For finding the square root of N using Newton's iterative formula, the correct expression is: |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-743-4-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-743-4-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-743-4-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-743-4-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/1-743-4-3.png"> | |
| 5862. |
For a random variable x following the probability density function, p(x), shown in figure, the mean and the variance are respectively, |
| A. | 1/2 and 2/3 |
| B. | 1 and 4/3 |
| C. | 1 and 2/3 |
| D. | 2 and 4/3 |
| Answer» C. 1 and 2/3 | |
| 5863. |
The input to a binary communication system, denoted by a random variable x, takes on one of the two values 0 or 1 with probabilities and . The behaviour of the communication system is modelled byP(Y = 1 |x = 1|) = and P(Y = 0|x = 0) = P(x = 1|y = 1) = |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-04-45-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-04-45-2.png"> |
| C. | 1 |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-04-45-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-04-45-2.png"> | |
| 5864. |
The signal flow graph of a system is shown below:The transfer of the system is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-06-51-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-06-51-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-06-51-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-06-51-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-06-51-4.png"> | |
| 5865. |
Which of the following addressing modes is used in the instruction PUSH B? |
| A. | Direct |
| B. | Register |
| C. | Register Indirect |
| D. | Immediate |
| Answer» D. Immediate | |
| 5866. |
Which of the following be true for a CE transistor amplifier if the emitter resistor value is made equal to zero? Its gain will increaseIts stability will increaseIts gain will decreaseIts stability will decrease Select the correct answer from the codes given below |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 3 and 4 |
| D. | 1 and 4 |
| Answer» E. | |
| 5867. |
In the circuit shown below, the op-amp is ideal, the transistor has VBE = 0.6 V and = 150. Decide whether the feedback in the circuit is positive or negative and determine the voltage V at the output of the op-amp |
| A. | Positive feedback, V = 10 V |
| B. | Positive feedback, V = 0 V |
| C. | Negative feedback, V = 5 V |
| D. | Negative feedback, V = 2 V |
| Answer» E. | |
| 5868. |
The feedback control system shown in figure is stable. |
| A. | for all K 0 |
| B. | only if K 1 |
| C. | only if 0 K < 1 |
| D. | only if -1 K < 1 |
| Answer» D. only if -1 K < 1 | |
| 5869. |
A single turn loop is situated in air, with a uniform magnetic field normal to its plane. The area of the loop is 5 m2 and the rate of change of flux density is 2 Wb/m2/s. What is the emf appearing at the terminals of the loop? |
| A. | -5 V |
| B. | -2 V |
| C. | -0.4 V |
| D. | 0 V |
| Answer» B. -2 V | |
| 5870. |
Consider the following: DistortionGainBias stabilizationSensitivityFrequency response Which of these properties of the power amplifier one should concentrate upon while designing a good power amplifier circuit? |
| A. | 1, 2 and 3 |
| B. | 1, 3 and 5 |
| C. | 2, 3 and 4 |
| D. | 4 and 5 |
| Answer» B. 1, 3 and 5 | |
| 5871. |
In the silicon BJT circuit shown below, assume that the emitter area of transistor Q1 is half that of transistor Q2.The value of current I0 is approximately |
| A. | 0.5 mA |
| B. | 2 mA |
| C. | 9.3 mA |
| D. | 15 mA |
| Answer» C. 9.3 mA | |
| 5872. |
A fair coin is tossed independently four times. The probability of the event "the number of time heads shown up is more than the number of times tails shown up" is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-27-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-27-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-27-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/7-03-27-4.png"> |
| Answer» E. | |
| 5873. |
Find RTH across the terminals A and B |
| A. | 52.28 |
| B. | 58.28 |
| C. | 52.82 |
| D. | 58.82 |
| Answer» E. | |
| 5874. |
The steady state error of a stable type 0 unity feedback system for a unit step function is : |
| A. | 0 |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-02-18-2.png"> |
| C. | |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/16-02-18-4.png"> |
| Answer» C. | |
| 5875. |
Assertion (A): Conductors do not permit propagation of waves more than a short distance into the conductor at microwave frequencies.Reason (R): The relaxation time constant for conductors is much small than the period of centimetric EM wave. |
| A. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
| B. | Both (A) and (R) are 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» C. (A) is true but (R) is false | |
| 5876. |
A material has conductivity of 105 mho/m and permeability of 4p x 10-7 H/m. The skin depth at 9 GHz is |
| A. | 1.678 m |
| B. | 26 m |
| C. | 17 m |
| D. | 32.32 m |
| Answer» D. 32.32 m | |
| 5877. |
Find Y- parameters |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-05-43-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-05-43-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-05-43-3.png"> |
| D. | None of these |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-05-43-2.png"> | |
| 5878. |
The value of 25 in octal system is |
| A. | 40 |
| B. | 20 |
| C. | 100 |
| D. | 200 |
| Answer» B. 20 | |
| 5879. |
Assertion (A): ECL gate has very high speed of operation.Reason (R): Transistors in ECL do not go into saturation region. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is true, R is false |
| D. | A is false, R is true |
| Answer» B. Both A and R are correct but R is not correct explanation of A | |
| 5880. |
Which of the following statements is not true in regard to storage time of a transistor? |
| A. | The transistor is in active region |
| B. | Both junctions are forward-biased |
| C. | The collector injects electrons or holes into the base region |
| D. | It is the time taken by the carriers to leave the base region |
| Answer» B. Both junctions are forward-biased | |
| 5881. |
Assertion (A): It is possible that a digital circuit gives the same output for different input voltages Reason (R): A digital circuit is also called logic circuit. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is true, R is false |
| D. | A is false, R is true |
| Answer» C. A is true, R is false | |
| 5882. |
In a ring counter for N clock pulses the scale for the counter is |
| A. | N : 1 |
| B. | N : 2 |
| C. | N : 10 |
| D. | N : 100 |
| Answer» B. N : 2 | |
| 5883. |
Assuming accumulator contain A 64 and the carry is set (1). What will register A and (CY) contain after XRA A? |
| A. | A 6 H, 1 |
| B. | A 6 H, 0 |
| C. | 00 H, 0 |
| D. | 00 H, 1 |
| Answer» D. 00 H, 1 | |
| 5884. |
2's complement of (-24) = |
| A. | 11101000 |
| B. | 01001000 |
| C. | 01111111 |
| D. | 00111111 |
| Answer» B. 01001000 | |
| 5885. |
Modem warfare has changed from large scale clashes of armies to suppression of civilian populations. Chemical agents that do their work silently appear to be suited to such warfare; and regretfully, there exist, people in military establishments who think that chemical agents are useful tools for their cause, which of the following statements best sums up the meaning of the above passage: |
| A. | Modem warfare has resulted in civil strife. |
| B. | Chemical agents are useful in modem warfare. |
| C. | Use of chemical agents in warfare would be undesirable. |
| D. | People in military establishments like to use chemical agents in war. |
| Answer» D. People in military establishments like to use chemical agents in war. | |
| 5886. |
The equation for loop currents I1 and I2 are __________ |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-04-36-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-04-36-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-04-36-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-04-36-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/13-04-36-4.png"> | |
| 5887. |
A power of 100 W is radiated from an isotropic radiator. The power radiated peer unit solid angle and the power density at a distance of 10 km from the antenna is respectively |
| A. | 25 W, 10 W |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/12-03-36-2.png"> |
| C. | 7.96 W, 0.08 W |
| D. | 0.08 W, 7.96 W |
| Answer» D. 0.08 W, 7.96 W | |
| 5888. |
A capacitor is considered to be completely charged in __________ time constant. |
| A. | one |
| B. | three |
| C. | five |
| D. | eight |
| Answer» D. eight | |
| 5889. |
For an m-derived high pass filter |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5890. |
Consider the following statements associated with two port networks. Z12 = Z21Y12 = Y21h12 = h21AD - BC = 1 Which one of the statement given above are correct? |
| A. | 1, 2, 3 |
| B. | 2, 3, 4 |
| C. | 1, 3, 4 |
| D. | 1, 2, 4 |
| Answer» E. | |
| 5891. |
A magnetic field in air is measured to beWhat current distribution leads to this field?[Hint: The algebra is trivial in cylindrical coordinates.] |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-05-49-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-05-49-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/6-05-49-3.png"> |
| D. | 0 |
| Answer» D. 0 | |
| 5892. |
Which of the following photodetector does not provide gain? |
| A. | Phototransistor |
| B. | Photoconductor |
| C. | Avalanche photodiode |
| D. | p-i-n photodiode |
| Answer» E. | |
| 5893. |
In figure the voltage drop across the 10 &ohm; resistance is 10 V. The resistance R |
| A. | is 6 Ω |
| B. | is 8 Ω |
| C. | is 4 Ω |
| D. | cannot be found |
| Answer» B. is 8 Ω | |
| 5894. |
Two similar coils have self inductance of 1 mH each. Coefficient of coupling is 0.5. The mutual inductance M is |
| A. | 0.25 mH |
| B. | 0.5 mH |
| C. | 0.707 mH |
| D. | 1 mH |
| Answer» C. 0.707 mH | |
| 5895. |
Given digits 2, 2, 3, 3, 3, 4, 4, 4, 4 how many distinct 4 digit numbers greater than 3000 can be formed? |
| A. | 50 |
| B. | 51 |
| C. | 52 |
| D. | 54 |
| Answer» C. 52 | |
| 5896. |
The number of variables in a function is odd and the number of minterms with even number of 0's are same as the number of minterms with odd number at 1 's, the expression formed can be represented in __________ as well as __________ form. |
| A. | exclusive - OR, NOR |
| B. | equivalence, exclusive - OR |
| C. | AND, coincidence |
| D. | OR, exclusive - OR |
| Answer» C. AND, coincidence | |
| 5897. |
The rms voltage measured across each of the circuit element in figure is as shown, when the circuit is excited by a sinusoidal voltage Es, the rms value of the source voltage es is |
| A. | 10 volt |
| B. | 2 volt |
| C. | E |
| D. | <sub><i>s</i></sub> |
| E. | 5 volt |
| Answer» E. 5 volt | |
| 5898. |
In figure V is ideal voltmeter having infinite resistance. It will read __________ volt. |
| A. | 40 |
| B. | 60 |
| C. | 0 |
| D. | 100 |
| Answer» B. 60 | |
| 5899. |
The high voltage level of a digital signal in positive logic is |
| A. | 1 |
| B. | 0 |
| C. | either 1 or 0 |
| D. | -1 |
| Answer» B. 0 | |
| 5900. |
Which of the- following display consumes least amount of power? |
| A. | LCD |
| B. | LED |
| C. | Fluorescent display |
| D. | All display consume same power |
| Answer» B. LED | |