MCQOPTIONS
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MCQOPTIONS
This section includes 60 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
For an ideal op-amp, which of the following is true? |
| A. | The differential voltage across the input terminals is zero |
| B. | The current into the input terminals is zero |
| C. | The current from output terminal is zero |
| D. | The output resistance is zero |
| Answer» D. The output resistance is zero | |
| 52. |
Differential amplifiers are used in |
| A. | instrumentation amplifiers |
| B. | voltage followers |
| C. | voltage regulators |
| D. | buffers |
| Answer» B. voltage followers | |
| 53. |
Which of the following amplifier is used in a digital to analog converter? |
| A. | non inverter |
| B. | voltage follower |
| C. | summer |
| D. | difference amplifier |
| Answer» D. difference amplifier | |
| 54. |
How many op-amps are required to implement this equation Vo = V1 |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 1 |
| Answer» E. | |
| 55. |
Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5kΩ and C1 = 0.05Μf |
| A. | 1.273kHz |
| B. | 12.73kHz |
| C. | 127.3 kHz |
| D. | . 127.3 Hz |
| Answer» B. 12.73kHz | |
| 56. |
The ideal OP-AMP has the following characteristics. |
| A. | Ri=∞ ,A=∞ ,R0=0 |
| B. | Ri=0 ,A=∞ ,R0=0 |
| C. | Ri=∞ ,A=∞ ,R0=∞ |
| D. | Ri=0 ,A=∞ ,R0=∞ |
| Answer» B. Ri=0 ,A=∞ ,R0=0 | |
| 57. |
An ideal OP-AMP is an ideal |
| A. | Current controlled Current source |
| B. | Current controlled voltage source |
| C. | Voltage controlled voltage source |
| D. | voltage controlled current source |
| Answer» C. Voltage controlled voltage source | |
| 58. |
The closed-loop voltage gain of an inverting amplifier equal to |
| A. | The ratio of the input resistance to feedback resistance |
| B. | The open-loop voltage gain |
| C. | The feedback resistance divided by the input resistance |
| D. | The input resistance |
| Answer» D. The input resistance | |
| 59. |
If ground is applied to the (+) terminal of an inverting op-amp, the (–) terminal will |
| A. | Not need an input resistor |
| B. | Be virtual ground |
| C. | Have high reverse current |
| D. | Not invert the signal |
| Answer» C. Have high reverse current | |
| 60. |
A non inverting closed loop op amp circuit generally has a gain factor |
| A. | Less than one |
| B. | Greater than one |
| C. | Of zero |
| D. | Equal to one |
| Answer» C. Of zero | |