MCQOPTIONS
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MCQOPTIONS
This section includes 261 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Three different Q points are shown on a dc load line. The upper Q point represents the: |
| A. | minimum current gain |
| B. | intermediate current gain |
| C. | maximum current gain |
| D. | cutoff point |
| Answer» D. cutoff point | |
| 252. |
A current ratio of IC/IE is usually less than one and is called: |
| A. | beta |
| B. | theta |
| C. | alpha |
| D. | omega |
| Answer» D. omega | |
| 253. |
The C-B configuration is used to provide which type of gain? |
| A. | voltage |
| B. | current |
| C. | resistance |
| D. | power |
| Answer» B. current | |
| 254. |
A decrease in base current of a C-E amplifier causes the voltage measured between the emitter and the collector to increase. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 255. |
What is the collector current for a C-E configuration with a beta of 100 and a base current of 30 A? |
| A. | 30 A |
| B. | .3 A |
| C. | 3 mA |
| D. | 3 MA |
| Answer» D. 3 MA | |
| 256. |
With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be: |
| A. | open |
| B. | infinite |
| C. | low resistance |
| D. | high resistance |
| Answer» D. high resistance | |
| 257. |
A transistor has a of 250 and a base current, IB, of 20 A. The collector current, IC, equals: |
| A. | 500 A |
| B. | 5 mA |
| C. | 50 mA |
| D. | 0.20833333333333 |
| Answer» C. 50 mA | |
| 258. |
In a C-E configuration, an emitter resistor is used for: |
| A. | stabilization |
| B. | ac signal bypass |
| C. | collector bias |
| D. | higher gain |
| Answer» B. ac signal bypass | |
| 259. |
Often a common-collector will be the last stage before the load; the main function(s) of this stage is to: |
| A. | provide voltage gain |
| B. | provide phase inversion |
| C. | provide a high-frequency path to improve the frequency response |
| D. | buffer the voltage amplifiers from the low-resistance load and provide impedance matching for maximum power transfer |
| Answer» E. | |
| 260. |
If a 2 mV signal produces a 2 V output, what is the voltage gain? |
| A. | 0.001 |
| B. | 0.004 |
| C. | 100 |
| D. | 1000 |
| Answer» E. | |
| 261. |
When transistors are used in digital circuits they usually operate in the: |
| A. | active region |
| B. | breakdown region |
| C. | saturation and cutoff regions |
| D. | linear region |
| Answer» D. linear region | |