McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Biomedical Engineering .
Chapters
| 1. |
Bio potential amplifiers have input terminals. |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» A. 3 | |
| 2. |
The ability of the amplifier to reject common voltages on its two input leads is known as |
| A. | common mode rejection rate |
| B. | coupled mode rejection rate |
| C. | common mode rejection ratio |
| D. | coupled mode rejection ratio |
| Answer» C. common mode rejection ratio | |
| 3. |
CMRR is measured in |
| A. | V/s |
| B. | dB |
| C. | dB/s |
| D. | dB/ms |
| Answer» B. dB | |
| 4. |
CMRR of the preamplifiers should be as high as possible. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 5. |
The output of differential gain is given by |
| A. | (difference of the two input voltage)*(feedback resistance/input resistance) |
| B. | (sum of the two input voltage)*(feedback resistance/input resistance) |
| C. | (difference of the two input voltage)*(input resistance/feedback resistance) |
| D. | (sum of the two input voltage)*(input resistance/feedback resistance) |
| Answer» A. (difference of the two input voltage)*(feedback resistance/input resistance) | |
| 6. |
In order to be able to minimize the effects of changes occurring in the electrode impedances, it is necessary to employ a preamplifier having a high input impedance. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 7. |
The impedance of the input should be in order to obtain high CMRR in the differential amplifier. |
| A. | low |
| B. | High |
| C. | Does not matter |
| D. | Very low |
| Answer» B. High | |
| 8. |
A Differential Amplifier should have collector resistor’s value (RC1 & RC2) as |
| A. | 5kΩ, 5kΩ |
| B. | 5Ω, 10kΩ |
| C. | 5Ω, 5kΩ |
| D. | 5kΩ, 10kΩ |
| Answer» A. 5kΩ, 5kΩ | |
| 9. |
A Differential Amplifier amplifies |
| A. | Input signal with higher voltage |
| B. | Input voltage with smaller voltage |
| C. | Sum of the input voltage |
| D. | None of the Mentioned |
| Answer» D. None of the Mentioned | |
| 10. |
The value of emitter resistance in Emitter Biased circuit are RE1=25kΩ & RE2=16kΩ. Find RE |
| A. | 9.756kΩ |
| B. | 41kΩ |
| C. | 9.723kΩ |
| D. | 10kΩ |
| Answer» A. 9.756kΩ | |
| 11. |
If output is measured between two collectors of transistors, then the Differential amplifier with two input signal is said to be configured as |
| A. | Dual Input Balanced Output |
| B. | Dual Input Unbalanced Output |
| C. | Single Input Balanced Output |
| D. | Dual Input Unbalanced Output |
| Answer» A. Dual Input Balanced Output | |
| 12. |
A differential amplifier is capable of amplifying |
| A. | DC input signal only |
| B. | AC input signal only |
| C. | AC & DC input signal |
| D. | None of the Mentioned |
| Answer» C. AC & DC input signal | |
| 13. |
In ideal Differential Amplifier, if same signal is given to both inputs, then output will be |
| A. | Same as input |
| B. | Double the input |
| C. | Not equal to zero |
| D. | Zero |
| Answer» D. Zero | |
| 14. |
An emitter bias Dual Input Balanced Output differential amplifier has VCC=20v, β=100, VBE=0.7v, RE=1.3kΩ. Find IE |
| A. | 7.42mA |
| B. | 9.8mA |
| C. | 10mA |
| D. | 8.6mA |
| Answer» A. 7.42mA | |
| 15. |
Find IC, given VCE=0.77v, VCC=10v, VBE=0.37v and RC=2.4kΩ in Dual Input Balanced Output differential amplifier |
| A. | 0.4mA |
| B. | 0.4A |
| C. | 4mA |
| D. | 4A |
| Answer» C. 4mA | |
| 16. |
For the circuit shown below, determine the Output voltage (Assume β=5, differential input resistance=12 kΩ) |
| A. | 4.33v |
| B. | 2.33v |
| C. | 3.33v |
| D. | 1.33v |
| Answer» C. 3.33v | |
| 17. |
In a Single Input Balanced Output Differential amplifier, given VCC=15v, RE = 3.9kΩ, VCE=2.4 v and re=250Ω. Determine Voltage gain |
| A. | 26 |
| B. | 56 |
| C. | 38 |
| D. | 61 |
| Answer» A. 26 | |
| 18. |
The characteristic impedance of a quarter wave transformer with load and input impedances given by 30 and 75 respectively is |
| A. | 47.43 |
| B. | 37.34 |
| C. | 73.23 |
| D. | 67.45 |
| Answer» A. 47.43 | |
| 19. |
For a matched line, the input impedance will be equal to |
| A. | Load impedance |
| B. | Characteristic impedance |
| C. | Output impedance |
| D. | Zero |
| Answer» B. Characteristic impedance | |
| 20. |
The reflection coefficient lies in the range of |
| A. | 0 < τ < 1 |
| B. | -1 < τ < 1 |
| C. | 1 < τ < ∞ |
| D. | 0 < τ < ∞ |
| Answer» A. 0 < τ < 1 | |
| 21. |
When the ratio of load voltage to input voltage is 5, the ratio of the characteristic impedance to the input impedance is |
| A. | 1/5 |
| B. | 5 |
| C. | 10 |
| D. | 25 |
| Answer» B. 5 | |
| 22. |
The power of the transmitter with a radiation resistance of 12 ohm and an antenna current of 3.5A is |
| A. | 147 |
| B. | 741 |
| C. | 174 |
| D. | 471 |
| Answer» A. 147 | |
| 23. |
The group delay of the wave with phase constant of 62.5 units and frequency of 4.5 radian/sec is |
| A. | 13.88 |
| B. | 31.88 |
| C. | 88.13 |
| D. | 88.31 |
| Answer» A. 13.88 | |
| 24. |
5 is" The maximum impedance of a transmission line 50 ohm and the standing wave ratio of |
| A. | 20 |
| B. | 125 |
| C. | 200 |
| D. | 75 |
| Answer» B. 125 | |
| 25. |
5 and Zo = 50, we get Zmax = 2.5 x 50 = 125 ohm. "9. |
| A. | " The minimum impedance of a transmission line 75 ohm with a standing wave ratio of 4 is 75 |
| B. | 300 |
| C. | 18.75 |
| D. | 150 |
| Answer» C. 18.75 | |
| 26. |
The average power in an electromagnetic wave is given by |
| A. | propagation constant |
| B. | poynting vector |
| C. | phase constant |
| D. | attenuation constant |
| Answer» B. poynting vector | |
| 27. |
The characteristic impedance of a transmission line is normally chosen to be |
| A. | 50 |
| B. | 75 |
| C. | 50 or 75 |
| D. | 100 |
| Answer» C. 50 or 75 | |
| 28. |
Identify the material which is not present in a transmission line setup. |
| A. | waveguides |
| B. | cavity resonator |
| C. | antenna |
| D. | oscillator |
| Answer» D. oscillator | |
| 29. |
What is the Common Mode Rejection Ratio? |
| A. | Output of a differential amplifier |
| B. | Ability of an amplifier to reject common mode signals |
| C. | Ability of an amplifier to accept common mode signals |
| D. | None of the mentioned |
| Answer» B. Ability of an amplifier to reject common mode signals | |
| 30. |
Which of the following is not a characteristic of an ideal op-amp? |
| A. | Zero slew rate |
| B. | Infinite bandwidth |
| C. | Infinite input impedance |
| D. | Zero output impedance |
| Answer» A. Zero slew rate | |
| 31. |
For an inverting amplifier positive terminal of input is connected to of 741 IC. |
| A. | Pin number 3 |
| B. | Pin number 2 |
| C. | Pin number 1 |
| D. | Pin number 7 |
| Answer» B. Pin number 2 | |
| 32. |
In 741 IC, pin number 4 is represented by |
| A. | Offset null |
| B. | Positive input |
| C. | Negative input |
| D. | Negative supply |
| Answer» D. Negative supply | |
| 33. |
Which of the following cannot be treated as a requirement of the instrumentation amplifier? |
| A. | Low drift |
| B. | Low input impedance |
| C. | High linearity |
| D. | High CMRR |
| Answer» B. Low input impedance | |
| 34. |
Amplifier with power supply and output circuits galvanically isolated are called |
| A. | Differential amplifier |
| B. | Isolation amplifier |
| C. | Inverting amplifier |
| D. | None of the mentioned |
| Answer» B. Isolation amplifier | |
| 35. |
Voltage follower is also known as |
| A. | Unity gain amplifier |
| B. | Differential amplifier |
| C. | Comparator |
| D. | None of the mentioned |
| Answer» A. Unity gain amplifier | |
| 36. |
Which configuration of op-amp is used for filter circuit? |
| A. | Differential |
| B. | Non-inverting |
| C. | Inverting |
| D. | None of the mentioned |
| Answer» C. Inverting | |
| 37. |
Amplification of low level signal can be done using |
| A. | Electrometer amplifier |
| B. | Difference amplifier |
| C. | Inverting amplifier |
| D. | Non inverting amplifier |
| Answer» A. Electrometer amplifier | |
| 38. |
For an ideal op-amp, zero input results in zero output. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 39. |
Which of the following is not a requirement of transmission lines? |
| A. | Minimum attenuation of signal |
| B. | Should not radiate signal |
| C. | High power signal |
| D. | Less noise |
| Answer» C. High power signal | |
| 40. |
What is used between the two lead wires of a parallel transmission line? |
| A. | Plastic |
| B. | Ceramic |
| C. | Metal |
| D. | Wood |
| Answer» A. Plastic | |
| 41. |
What is used as a surrounding for the solid center core in a coaxial cable? |
| A. | Plastic dielectric |
| B. | Ceramic |
| C. | Metal |
| D. | Wood |
| Answer» A. Plastic dielectric | |
| 42. |
For what purpose was twisted pair cable first used? |
| A. | AM |
| B. | Telephone |
| C. | Wi-Fi |
| D. | Digital data transmission |
| Answer» B. Telephone | |
| 43. |
What is the type of transmission line in which neither wire is connected to the ground? |
| A. | Unbalanced line |
| B. | Twisted pair cable |
| C. | LAN lines |
| D. | Balanced line |
| Answer» D. Balanced line | |
| 44. |
What is the phase difference between the current flowing in the two wires of a balanced line? |
| A. | 100° |
| B. | 180° |
| C. | 150° |
| D. | 90° |
| Answer» B. 180° | |
| 45. |
In a balanced line, noise is present in the transmission line but cancels at the receiver. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 46. |
What is it called when the noise is present in the transmission line but gets canceled at the receiver? |
| A. | Cancellation mode |
| B. | Common mode cancellation |
| C. | Common mode rejection |
| D. | Rectification |
| Answer» C. Common mode rejection | |
| 47. |
Coaxial cables are lines? |
| A. | Balanced |
| B. | Unbalanced |
| C. | LAN |
| D. | Parallel wire |
| Answer» B. Unbalanced | |
| 48. |
What is the device that converts the balanced line to an unbalanced line called? |
| A. | Unbalancer |
| B. | Balancer |
| C. | Balun |
| D. | Equalizer |
| Answer» C. Balun | |
| 49. |
Which filter attenuates any frequency outside the pass band? |
| A. | Band-pass filter |
| B. | Band-reject filter |
| C. | Band-stop filter |
| D. | All of the mentioned |
| Answer» A. Band-pass filter | |
| 50. |
Narrow band-pass filters are defined as |
| A. | Q < 10 |
| B. | Q = 10 |
| C. | Q > 10 |
| D. | None of the mentioned |
| Answer» C. Q > 10 | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.