MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For an RC admittance function |
| A. | the lowest critical frequency is a zero |
| B. | the highest critical frequency is a pole |
| C. | the lowest critical frequency is zero and the highest critical frequency is a pole |
| D. | the lowest critical frequency is a pole |
| Answer» D. the lowest critical frequency is a pole | |
| 2. |
The poles and zeros of a positive real functions are real or occur in conjugate pair. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
A coil is connected across a 200 V, 50 Hz supply and takes a current of 10 A. The loss in the coil is 1000 W. The impedance and resistance of the coil are |
| A. | 10 Ω, 8 Ω |
| B. | 15 Ω, 8 Ω |
| C. | 20 Ω, 10 Ω |
| D. | 30 Ω, 15 Ω |
| Answer» D. 30 Ω, 15 Ω | |
| 4. |
The current I flowing in the branch is |
| A. | -12 A |
| B. | 12 A |
| C. | 3 A |
| D. | -3 A |
| Answer» B. 12 A | |
| 5. |
Consider the following: Energy storage capability of basic passive elements is due to the fact thatresistance dissipates energycapacitance stores energyinductance dissipates energy Which of the above is/are correct? |
| A. | 1, 2, and 3 |
| B. | 1 and 3 |
| C. | 3 only |
| D. | 1 and 2 |
| Answer» E. | |
| 6. |
In an ac circuit that delivers constant power at varying p.f., the current is |
| A. | lowest when p.f. is leading |
| B. | lowest when p.f. is lagging |
| C. | lowest when p.f is unity |
| D. | the same for all power factors |
| Answer» D. the same for all power factors | |
| 7. |
In the analogy between electric and magnetic circuits permeability is analogous to |
| A. | resistivity |
| B. | conductivity |
| C. | electric field intensity |
| D. | current density |
| Answer» C. electric field intensity | |
| 8. |
Two port circuits are connected in parallel. To determine the response, it is more convenient to use |
| A. | O.C. impedance parameters |
| B. | S.C. admittance parameters |
| C. | ABCD parameters |
| D. | <i>h</i> |
| E. | parameters |
| Answer» C. ABCD parameters | |
| 9. |
The dual of a link is |
| A. | twig |
| B. | node |
| C. | loop |
| D. | tree branch |
| Answer» E. | |
| 10. |
A network is said to be two port network if there is no independent source in the networkno dependent source in the networknon-linear component in the circuitno external connection exist between I/P and 0/P |
| A. | 1, 2, 3 |
| B. | 3, 4, 2 |
| C. | 1, 3, 4 |
| D. | 4, 3, 1, 2 |
| Answer» D. 4, 3, 1, 2 | |
| 11. |
In a network |
| A. | the number of tree branches is always less than the number of links |
| B. | the number of tree branches is always more than the number of links |
| C. | the number of tree branches and links are always equal |
| D. | the number of tree branches has no relation with the number of links |
| Answer» C. the number of tree branches and links are always equal | |
| 12. |
Laplace transform of a unit doublet U-2 (t) is |
| A. | 1/ |
| B. | <i>s</i> |
| C. | <i>s</i> |
| D. | 0 |
| E. | 1 |
| Answer» C. <i>s</i> | |
| 13. |
In the transformer shown in the figure, the inductance measured across the terminal 1 and 2 was 4 H with open terminals 3 and 4. It was 3H when the terminals 3 and 4 were short circuited. The coefficient of coupling would be |
| A. | 1 |
| B. | 0.707 |
| C. | 0.5 |
| D. | indetermine due to insufficient data |
| Answer» E. | |
| 14. |
A series RL circuit is excited by a voltage v(t) = Ve-at such that a = R/L. Then the circuit current is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/93-162-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/93-162-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/93-162-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/93-162-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/93-162-3.png"> | |
| 15. |
Assertion (A): When a square periodic wave is applied to an RC circuit, the voltage across capacitor is observed to be a triangular periodic wave.Reason (R): The RC circuit works as integrator and its time constant is much larger than time period of input wave. |
| A. | Both A and R are true and R is correct explanation of A |
| B. | Both A and R are true and 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» B. Both A and R are true and R is not the correct explanation of A | |
| 16. |
Assertion (A): In a series resonant circuit current is maximum at resonance.Reason (R): The inductive and capacitive reactances are equal. |
| A. | Both A and R are true and R is correct explanation of A |
| B. | Both A and R are true and 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» B. Both A and R are true and R is not the correct explanation of A | |
| 17. |
The condition on R, L and C such that the step response y(t) in the figure has no oscillation, is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/142-982-2.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/142-982-3.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/142-982-4.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/142-982-5.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/142-982-4.png"> | |
| 18. |
At a frequency less than the resonant frequency |
| A. | series circuit is inductive and parallel circuit is capacitive |
| B. | series circuit is capacitive and parallel circuit is inductive |
| C. | both circuits are capacitive |
| D. | both circuits are inductive |
| Answer» C. both circuits are capacitive | |
| 19. |
The relation AD - BC = 1 where A, B, C, D are transmission parameters of a network is valid for |
| A. | every network |
| B. | passive but not reciprocal network |
| C. | passive and reciprocal network |
| D. | both active and passive networks |
| Answer» D. both active and passive networks | |
| 20. |
A network N is dual of network N if |
| A. | both of them have same mesh equation |
| B. | both of them have same node equation |
| C. | mesh equation of one are the node equations of the other |
| D. | KCL and KVL equations are the same |
| Answer» D. KCL and KVL equations are the same | |
| 21. |
The resistance of the aluminium conductor (r = 2.83 x 10-8 &ohm;m) in figure is |
| A. | 0.001 Ω |
| B. | less than 0.001 Ω |
| C. | more than 0.001 Ω |
| D. | more than 0.002 Ω |
| Answer» C. more than 0.001 Ω | |
| 22. |
The graph of a network is shown in the figure. Which one of the figure shown is not a tree of the graph? |
| A. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/148-1050-2.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/148-1050-3.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/148-1050-4.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/networks-analysis-and-synthesis/148-1050-5.png"> |
| Answer» E. | |
| 23. |
In figure the phase plot |
| A. | will be 90 at = 0 and 0 at = |
| B. | will be 0 at = 0 and 90 at = |
| C. | will be 45 at = 0 and 0 at = |
| D. | will be 45 at = 0 and 90 at = |
| Answer» B. will be 0 at = 0 and 90 at = | |
| 24. |
In the circuit shown in the given figure, switch k is closed at t = 0. The circuit was initially relaxed then which one of the following sources of v(t) will produce maximum current at t = 0+? |
| A. | Unit step |
| B. | Unit impulse |
| C. | Unit ramp |
| D. | Unit step plus unit ramp |
| Answer» C. Unit ramp | |
| 25. |
The colour on the extreme left in general purpose fixed resistors represents |
| A. | first significant digit |
| B. | tolerance |
| C. | wattage rating |
| D. | voltage rating |
| Answer» B. tolerance | |
| 26. |
When a current flows through a conductor, |
| A. | an electric field exists at all points within the conductor |
| B. | electric field exists only at all points on the surface of the conductor |
| C. | electric field exists only at ends of the conductor |
| D. | any of the above depending on magnitude of current |
| Answer» B. electric field exists only at all points on the surface of the conductor | |
| 27. |
Some of MOS families are PMOS, NMOS, CMOS. The family dominating the LSI field where low power consumption is necessary is |
| A. | NMOS |
| B. | CMOS |
| C. | PMOS |
| D. | both NMOS and CMOS |
| Answer» C. PMOS | |
| 28. |
The ASCII code is |
| A. | 5-bit code |
| B. | 7-bit code |
| C. | 9-bit code |
| D. | 11-bit code |
| Answer» C. 9-bit code | |
| 29. |
The binary addition 1 + 1 = |
| A. | 11 |
| B. | 10 |
| C. | 111 |
| D. | 100 |
| Answer» C. 111 | |
| 30. |
A 3 bit up-down counter can count from |
| A. | 000 to 111 |
| B. | 111 to 000 |
| C. | 000 to 111 and also from 111 to 000 |
| D. | none of the above |
| Answer» D. none of the above | |
| 31. |
The density of dynamic RAM is |
| A. | the same as static RAM |
| B. | less than that of static RAM |
| C. | more than that of static RAM |
| D. | either equal or less than that of static RAM |
| Answer» D. either equal or less than that of static RAM | |
| 32. |
The gates G1 and G2 in the figure have propagation delays of 10 n sec. and 20 n sec. respectively. If the input Vi makes an output change from logic 0 to 1 at time t = t0 then the output wavefrom V0 is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/digital-electronics/39-580-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/digital-electronics/39-580-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/digital-electronics/40-580-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/digital-electronics/40-580-4.png"> |
| Answer» E. | |
| 33. |
A 3 input NAND gate is to be used as inverter. Which of the following will give better results? |
| A. | The two unused inputs are left open |
| B. | The two unused inputs are connected to 0 |
| C. | The two unused inputs are connected to 1 |
| D. | None of the above |
| Answer» D. None of the above | |
| 34. |
The maximum counting range of a four stage counter using IC 74193 is |
| A. | 0 to 1023 |
| B. | 0 to 4093 |
| C. | 0 to 65535 |
| D. | 0 to 131071 |
| Answer» D. 0 to 131071 | |
| 35. |
If memory chip size is 256 x 1 bits, the number of chips required to make 1 k byte memory is |
| A. | 8 |
| B. | 12 |
| C. | 24 |
| D. | 32 |
| Answer» E. | |
| 36. |
Computers use RC circuit for edge triggering. |
| A. | True |
| B. | False |
| Answer» C. | |
| 37. |
The function Y = AC + BD + EF is |
| A. | POS |
| B. | SOP |
| C. | Hybrid |
| D. | none of the above |
| Answer» C. Hybrid | |
| 38. |
Assertion (A): A multiplexer can be used for data routing.Reason (R): A multiplexer has one input and many outputs. |
| 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» D. A is false, R is true | |
| 39. |
A 10 bit ADC with a full scale output voltage of 10.24 V is to be designed to have LSB/2 accuracy. If ADC is calibrated at 25 C, the maximum net temperature coefficient of ADC should not exceed |
| A. | 200 V/ C |
| B. | 400 V/ C |
| C. | 600 V/ C |
| D. | 800 V/ C |
| Answer» B. 400 V/ C | |
| 40. |
If all the LEDs in a seven segment display are turned on, the number displayed is |
| A. | 1 |
| B. | 3 |
| C. | 0 |
| D. | 8 |
| Answer» E. | |
| 41. |
In which counter does the maximum frequency depend on the modulus? |
| A. | Synchronous |
| B. | Ripple |
| C. | Both synchronous and ripple |
| D. | Neither synchronous nor ripple |
| Answer» C. Both synchronous and ripple | |
| 42. |
A current tracer responds to |
| A. | steady current only |
| B. | pulsating current only |
| C. | both pulsating and steady current |
| D. | none of the above |
| Answer» C. both pulsating and steady current | |
| 43. |
A presettable counter with 4 flip flops can start counting from |
| A. | 0000 |
| B. | 1000 |
| C. | any number from 0000 to 1000 |
| D. | any number from 0000 to 1111 |
| Answer» E. | |
| 44. |
FF16 when converted to 8421BCD = |
| A. | 0000 0101 0101 |
| B. | 0010 0101 0101 |
| C. | 1111 0101 0101 |
| D. | 1000 0101 0101 |
| Answer» C. 1111 0101 0101 | |
| 45. |
Karnaugh map can not be drawn when the number of variables is more than 4 |
| A. | True |
| B. | False |
| Answer» C. | |
| 46. |
Binary number 11001 is equivalent to decimal number |
| A. | 35 |
| B. | 15 |
| C. | 105 |
| D. | 25 |
| Answer» E. | |
| 47. |
ECL has high switching speed because the transistors are |
| A. | switching between cutoff and saturation regions |
| B. | switching between cutoff and active regions |
| C. | switching between active and saturation regions |
| D. | none of the above |
| Answer» C. switching between active and saturation regions | |
| 48. |
Which of the following are included in the architecture of computer? Addressing mode, design of CPUInstruction set, data formatSecondary memory, operating system Select the correct answer using the codes given below: |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 1 and 3 |
| D. | 1, 2 and 3 |
| Answer» B. 2 and 3 | |
| 49. |
Assertion (A): TTL is a very popular logic in SSI and MSI category.Reason (R): In Schottky TTL the power dissipation is less than in ordinary TTL. |
| 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» D. A is false, R is true | |
| 50. |
Using the same flip flops |
| A. | a synchronous flip flop can operate at higher frequency than ripple counter |
| B. | a ripple counter can operate at higher frequency than synchronous counter |
| C. | both ripple and synchronous counter can operate at the same frequency |
| D. | can not determine |
| Answer» B. a ripple counter can operate at higher frequency than synchronous counter | |