MCQOPTIONS
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MCQOPTIONS
This section includes 111 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Components or combinations of components with common currents, in a series–parallel circuit, are in: |
| A. | parallel with each other |
| B. | series with each other |
| C. | either series or parallel with each other |
| D. | none of the above |
| Answer» D. none of the above | |
| 2. |
In a series–parallel circuit, individual component power dissipations are calculated using: |
| A. | individual component parameters |
| B. | a percent of the voltage division ratio squared |
| C. | total current squared multiplied by the resistor values |
| D. | a percent of the total power depending on resistor ratios |
| Answer» B. a percent of the voltage division ratio squared | |
| 3. |
The first goal(s) to accomplish in analyzing a complex series–parallel circuit is to: |
| A. | equate all parallel components |
| B. | equate all series components |
| C. | solve for all the voltage drops |
| D. | solve for the total current and resistance |
| Answer» E. | |
| 4. |
The total resistance in the given circuit can be found using the formula:RT = R1 + R2 || R3 || R4. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Series components in a series–parallel circuit may be in series with other _______________ components, or with other _______________ components. |
| A. | individual, combinations of |
| B. | series, parallel |
| C. | parallel, series |
| D. | shunt, parallel |
| Answer» B. series, parallel | |
| 6. |
In a series–parallel circuit consisting of R1 and R2 in series and connected in parallel with R3, if R1 opens, then R2's voltage will: |
| A. | increase |
| B. | decrease |
| C. | remain the same |
| D. | cannot tell |
| Answer» C. remain the same | |
| 7. |
Observed voltages not being shared identify components in parallel in a seriesparallel circuit. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
When analyzing seriesparallel circuit currents, you should start with the current in the branch farthest from the source. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
If a series–parallel circuit has all 30-ohm resistors, what is the total resistance when R1 is in series with a parallel circuit consisting of R2 and R3? |
| A. | 10 ohms |
| B. | 20 ohms |
| C. | 45 ohms |
| D. | 90 ohms |
| Answer» D. 90 ohms | |
| 10. |
What determines if resistor connections are in series, parallel, or series–parallel? |
| A. | the voltage source |
| B. | the power source |
| C. | resistance |
| D. | current flow |
| Answer» E. | |
| 11. |
A certain circuit is composed of two parallel resistors. The total resistance is 1,403 . One of the resistors is 2 k. The other resistor value is |
| A. | 1,403 |
| B. | 4.7 k |
| C. | 2 k |
| D. | 3,403 |
| Answer» C. 2 k | |
| 12. |
In a certain five-step R/2R ladder network, the smallest resistor value is 1 k. The largest value is |
| A. | indeterminable |
| B. | 2 k |
| C. | 10 k |
| D. | 20 k |
| Answer» C. 10 k | |
| 13. |
A galvanometer is a meter that measures small amounts of voltage. |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
A smaller-value load resistor will cause the output voltage to change more than a larger-value one. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
A voltage divider consists of two 68 kΩ resistors and a 24 V source. The unknown output voltage is |
| A. | 12 V |
| B. | 24 V |
| C. | 0 V |
| D. | 6 V |
| Answer» B. 24 V | |
| 16. |
A 12 kΩ resistor, a 15 kΩ resistor, and a 22 kΩ resistor are in series with two 10 kΩ resistors that are in parallel. The source voltage is 75 V. Current through the 15 kΩ resistor is approximately |
| A. | 14 mA |
| B. | 1.4 mA |
| C. | 5 mA |
| D. | 50 mA |
| Answer» C. 5 mA | |
| 17. |
The higher the range setting, the less the internal resistance and the greater the load effect of the voltmeter on a circuit. |
| A. | True |
| B. | False |
| Answer» C. | |
| 18. |
A balanced Wheatstone bridge consists of an RV of 3,500 Ω, an R2 of 200 Ω, and an R3 of 680 Ω. The value of RUNK is |
| A. | 680 Ω |
| B. | 1,029 Ω |
| C. | 200 Ω |
| D. | 880 Ω |
| Answer» C. 200 Ω | |
| 19. |
In a certain five-step R/2R ladder network, the smallest resistor value is 1 kΩ. The largest value is |
| A. | Indeterminable |
| B. | 2 kΩ |
| C. | 10 kΩ |
| D. | 20 kΩ |
| Answer» C. 10 kΩ | |
| 20. |
A Wheatstone bridge consists of four resistors in parallel. |
| A. | True |
| B. | False |
| Answer» C. | |
| 21. |
The parallel combination of a 470 Ω resistor and a 1.2 kΩ resistor is in series with the parallel combination of three 3 kΩ resistors. A 200 V source is connected across the circuit. The resistor with the most current has a value of |
| A. | 470 Ω or 1.2 kΩ |
| B. | 3 kΩ |
| C. | 470 Ω |
| D. | 1.2 kΩ |
| Answer» D. 1.2 kΩ | |
| 22. |
Two equal-value resistors in series will divide the source voltage equally. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 23. |
The parallel combination of a 6.8 kΩ resistor and a 10 kΩ resistor is in series with the parallel combination of a 2.2 kΩ resistor and a 1 kΩ resistor. A 100 V source is connected across the circuit. The resistor(s) with the greatest voltage drop is (are) |
| A. | 6.8 kΩ |
| B. | 2.2 kΩ |
| C. | 6.8 kΩ and 10 kΩ |
| D. | 2.2 kΩ and 1 kΩ |
| Answer» D. 2.2 kΩ and 1 kΩ | |
| 24. |
Three 10 kΩ resistors are connected in series. A 20 kΩ resistor is connected in parallel across one of the 10 kΩ resistors. The voltage source is 24 V. The total current in the circuit is |
| A. | 900 μA |
| B. | 9 mA |
| C. | 90 mA |
| D. | 800 μA |
| Answer» B. 9 mA | |
| 25. |
A certain Wheatstone bridge has the following resistor values: R1 = 10 kΩ, R2 = 720 Ω, and R4 = 2.4 kΩ. The unknown resistance is |
| A. | 24 Ω |
| B. | 2.4 Ω |
| C. | 300 Ω |
| D. | 3,000 Ω |
| Answer» E. | |
| 26. |
A Wheatstone bridge is often shown in a "diamond" configuration. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 27. |
On which of the following voltage range settings will a voltmeter present the minimum load on a circuit? |
| A. | 1 V |
| B. | 50 V |
| C. | 500 V |
| D. | 1,000 V |
| Answer» E. | |
| 28. |
The parallel combination of a 470 Ω resistor and a 1.5 kΩ resistor is in series with the parallel combination of five 1 kΩ resistors. The source voltage is 50 V. The percentage of the load current through any single 1 KΩ resistor is |
| A. | 25 % |
| B. | 20 % |
| C. | 100 % |
| D. | 50 % |
| Answer» C. 100 % | |
| 29. |
A resistor ladder network is a special type of series-parallel circuit. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 30. |
Using the current-divider formula, you can find the current in any branch of a series-parallel circuit. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 31. |
Using Kirchhoff's voltage law, you can find the voltages across certain parts of a series-parallel circuit. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 32. |
A certain circuit is composed of two parallel resistors. The total resistance is 1,403 Ω. One of the resistors is 2 kΩ. The other resistor value is |
| A. | 1,403 Ω |
| B. | 4.7 kΩ |
| C. | 2 kΩ |
| D. | 3,403 Ω |
| Answer» C. 2 kΩ | |
| 33. |
A voltage divider consists of two 100 kΩ resistors and a 12 V source. What will the output voltage be if a load resistor of 1 MΩ is connected to the output? |
| A. | 0.57 V |
| B. | 6 V |
| C. | 12 V |
| D. | 5.7 V |
| Answer» E. | |
| 34. |
Two 3.3 kΩ resistors are in series and this series combination is in parallel with a 4.7 kΩ resistor. The voltage across one of the 3.3 kΩ resistors is 12 V. The voltage across the 4.7 kΩ resistor is |
| A. | 24 V |
| B. | 12 V |
| C. | 0 V |
| D. | 6 V |
| Answer» B. 12 V | |
| 35. |
To derive 18 V and 12 V from a 24 V supply requires a voltage divider with three taps. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 36. |
The parallel combination of a 470 Ω resistor and a 680 Ω resistor is in series with the parallel combination of four 2 kΩ resistors. The total resistance is |
| A. | 1,650 Ω |
| B. | 1,078 Ω |
| C. | 77.8 Ω |
| D. | 778 Ω |
| Answer» E. | |
| 37. |
Two 1.2 kΩ resistors are in series and this series combination is in parallel with a 3.3 kΩ resistor. The total resistance is |
| A. | 138 Ω |
| B. | 1,389 Ω |
| C. | 5,700 Ω |
| D. | 880 Ω |
| Answer» C. 5,700 Ω | |
| 38. |
A certain voltage divider consists of two 12 kΩ resistors in series. Which of the following load resistors will have the most effect on the output voltage? |
| A. | 1 MΩ |
| B. | 24 kΩ |
| C. | 18 kΩ |
| D. | 12 kΩ |
| Answer» E. | |
| 39. |
A certain voltage divider consists of three 1 kΩ resistors in series. Which of the following load resistors will have the least effect on the output voltage? |
| A. | 1 MΩ |
| B. | 100 kΩ |
| C. | 1 kΩ |
| D. | 330 Ω |
| Answer» B. 100 kΩ | |
| 40. |
A 6 V battery output is divided down to obtain two output voltages. Three 2.2 kΩ resistors are used to provide the two taps. The two output voltages are |
| A. | 2 V, 4 V |
| B. | 2 V, 2 V |
| C. | 2 V, 6 V |
| D. | 4 V, 6 V |
| Answer» B. 2 V, 2 V | |
| 41. |
The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is |
| A. | 20,000 Ω |
| B. | 100,000 Ω |
| C. | 200,000 Ω |
| D. | 1,000,000 Ω |
| Answer» C. 200,000 Ω | |
| 42. |
A Wheatstone bridge may be used to determine the value of an unknown resistance. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 43. |
If the voltage between points A and B equals 9 V in the given circuit, then VR3 equals ______. |
| A. | 0.9 V |
| B. | 8.1 V |
| C. | 9 V |
| D. | More information is needed to find VR3. |
| Answer» C. 9 V | |
| 44. |
Opens and shorts are typical problems that occur in electric circuits. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 45. |
The total resistance in the circuit is 1.6 k. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 46. |
In the given circuit, the voltage at point A equals ______. |
| A. | –10 V |
| B. | +1 V |
| C. | +9 V |
| D. | +10 V |
| Answer» E. | |
| 47. |
The total resistance in the given circuit can be found using the formula: RT = R1 + R2 || R3 || R4. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 48. |
If R3 opens in the given circuit, the total resistance (RT) between points A and B equals ____. |
| A. | 900 |
| B. | 100 |
| C. | 110 |
| D. | infinite resistance |
| Answer» D. infinite resistance | |
| 49. |
Attaching a 6 k load to a voltage divider will cause a smaller decrease in the output voltage than will attaching a 5 k load. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 50. |
When analyzing series–parallel circuit currents, you should start with the current in the branch farthest from the source. |
| A. | 1 |
| B. | |
| Answer» C. | |