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. |
The type of power amplifier which exhibits crossover distortion in its output is |
| A. | Class A |
| B. | Class B |
| C. | Class AB |
| D. | Class C |
| Answer» C. Class AB | |
| 2. |
A differential amplifier, amplifies |
| A. | and mathematically differentiates the average of the voltages on the two input lines |
| B. | and differentiates the input waveform on one line when the other line is grounded |
| C. | the difference of voltages between the two input lines |
| D. | and differentiates the sum of the two input waveform |
| Answer» D. and differentiates the sum of the two input waveform | |
| 3. |
A power gain of 30dB is equivalent to which amplification factor? |
| A. | 0.001 |
| B. | 1/30 |
| C. | 30 |
| D. | 1000 |
| Answer» E. | |
| 4. |
A disadvantage of a half wave rectifier is the fact that |
| A. | The output voltage is excessive compared to that of a full-wave rectifier |
| B. | The output current is excessive compared to that of a full-wave rectifier |
| C. | The output waveform is harder to filter than is the case with a full wave rectifier |
| D. | It requires several expensive diodes, whereas a full wave rectifier requires only a single diode |
| Answer» D. It requires several expensive diodes, whereas a full wave rectifier requires only a single diode | |
| 5. |
In N-type semiconductor, the minority carriers are |
| A. | Electrons |
| B. | Protons |
| C. | Holes |
| D. | Positrons |
| Answer» D. Positrons | |
| 6. |
The VA rating of a transformer is an expression of |
| A. | The maximum frequency at which it can function |
| B. | The type of core material it has |
| C. | The voltage step-up or step-down ratio |
| D. | None of the above |
| Answer» E. | |
| 7. |
When the bias in an FET stops the flow of current, the condition is called |
| A. | Forward breakover |
| B. | Cutoff |
| C. | Reverse bias |
| D. | Pinchoff |
| Answer» E. | |
| 8. |
You can find the zener diode in |
| A. | The mixer in a superheterodyne receiver |
| B. | The PLL in a circuit for detecting FM |
| C. | The product detector in a receiver for SSB |
| D. | The voltage regulator in a power supply |
| Answer» E. | |
| 9. |
The other name for beta of BJT is |
| A. | Current amplification factor |
| B. | Voltage amplification factor |
| C. | Power amplification factor |
| D. | Maximum amplification frequency |
| Answer» B. Voltage amplification factor | |
| 10. |
Which of the following is not characteristic of an oscillator? |
| A. | Negative feedback |
| B. | Good output to input coupling |
| C. | Reasonably high transistor gain |
| D. | Alternating current signal output |
| Answer» B. Good output to input coupling | |
| 11. |
A very brief, high voltage spike on an ac power line is called as |
| A. | A bleeder |
| B. | An arc |
| C. | A transient |
| D. | An avalanche |
| Answer» D. An avalanche | |
| 12. |
Which of the following is not a common form of data transmission |
| A. | Polarization modulation |
| B. | Frequency modulation |
| C. | Amplitude modulation |
| D. | Phase modulation |
| Answer» B. Frequency modulation | |
| 13. |
A diode can be used as a frequency multiplier because of its |
| A. | Junction capacitance |
| B. | Non linearity |
| C. | Avalanche voltage |
| D. | Forward breakover |
| Answer» C. Avalanche voltage | |