MCQOPTIONS
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MCQOPTIONS
This section includes 99 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A resistor with a value of 9.9 k 10% could have a value between 8.91 k and 10.89 k. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
A 2% 55 k resistor would have a color coding of green, green, black, red, red. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
4 amperes will flow through a 10 resistor if 20 volts are placed across the resistor. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
If 500 mA is flowing through a 10 resistor, the wattage rating of the resistor should be 2 watts. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
What current is flowing in the circuit? |
| A. | 288 kA |
| B. | 2 kA |
| C. | 50 mA |
| D. | 500 |
| E. | A |
| Answer» E. A | |
| 6. |
What is the power dissipated by a 1.2 k resistor with 12 volts across it? |
| A. | 12 W |
| B. | 1.2 W |
| C. | .12 W |
| D. | 12 mW |
| Answer» D. 12 mW | |
| 7. |
The source is 24 volts and the load resistance is 100 . What is the load current? |
| A. | 2.4 A |
| B. | 240 mA |
| C. | 24 mA |
| D. | 2.4 mA |
| Answer» C. 24 mA | |
| 8. |
The word means that: |
| A. | energy has been transferred |
| B. | it is inversely related to energy |
| C. | no energy has been transferred |
| D. | work and energy are not related |
| Answer» B. it is inversely related to energy | |
| 9. |
A conductor's cross-sectional area in circular mils for inch is: |
| A. | 500 cmils |
| B. | 100,000 cmils |
| C. | 1,000,000 cmils |
| D. | 500,000,000 cmils |
| Answer» D. 500,000,000 cmils | |
| 10. |
How many ohms of resistance allows a current of 720 A to flow when 3.6 kV is applied? |
| A. | 200 n |
| B. | 5 k |
| C. | 200 k |
| D. | 5 M |
| Answer» E. | |
| 11. |
What value of a 1.3 k resistor as measured by a digital voltmeter would be considered within tolerance? |
| A. | 1234 |
| B. | 1235 |
| C. | 1366 |
| D. | 1367 |
| Answer» C. 1366 | |
| 12. |
A 33 k resistor with a 20% tolerance checks out as ok with which of the following ohmmeter readings? |
| A. | 26400 ohms |
| B. | 24183 ohms |
| C. | 6600 ohms |
| D. | 39970 ohms |
| Answer» B. 24183 ohms | |
| 13. |
For P = V/R, a decrease in resistance should produce: |
| A. | a decrease in power |
| B. | an increase in ohms |
| C. | an increase in power |
| D. | a decrease in current |
| Answer» D. a decrease in current | |
| 14. |
How is a 3.9 k resistor color-coded? |
| A. | red, white, red, gold |
| B. | red, green, orange, silver |
| C. | orange, white, red, gold |
| D. | orange, green, orange, silver |
| Answer» D. orange, green, orange, silver | |
| 15. |
Resistivity is measured in cmil.Ω/ft. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
One horsepower is 746 watts. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 17. |
A 2% 55 k resistor would have a color coding of green, green, black, red, red. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 18. |
A rheostat is not a type of variable resistor. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 19. |
The resistive track of a rheostat or potentiometer can be classified as having either a linear or tapered resistance. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 20. |
A resistor with a value of 9.9 k 10% could have a value between 8.91 k and 10.89 k. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 21. |
The maximum potential a material can withstand without rupture is called breakdown voltage. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 22. |
Variable resistors have problems with the wiper making contact. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 23. |
The cross-sectional area of a conductor is one factor that determines the conductor's resistance to current. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 24. |
Fixed-value resistors can internally short-circuit. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 25. |
A protoboard is used to make experimental circuits. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 26. |
Resistance is inversely proportional to current. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 27. |
A load resistance is the resistance of the load. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 28. |
What property does an incandescent lamp possess? |
| A. | cold resistance |
| B. | hot resistance |
| C. | ballast resistance |
| D. | both cold and hot resistance |
| Answer» E. | |
| 29. |
How many joules of energy will a 10 W lamp dissipate in one minute? |
| A. | 10 joules |
| B. | 60 joules |
| C. | 600 joules |
| D. | 3600 joules |
| Answer» D. 3600 joules | |
| 30. |
With a complex circuit, a supply source senses: |
| A. | open circuit components |
| B. | when voltages need to be increased |
| C. | only a single resistive connection |
| D. | when complex currents are needed |
| Answer» D. when complex currents are needed | |
| 31. |
One advantage of a carbon film resistor over a carbon composition resistor is: |
| A. | less circuit noise |
| B. | smaller size |
| C. | higher wattage |
| D. | poor tolerance |
| Answer» B. smaller size | |
| 32. |
Components designed to oppose the flow of current are called: |
| A. | insulators |
| B. | conductors |
| C. | resistors |
| D. | heat exchangers |
| Answer» D. heat exchangers | |
| 33. |
A wire with a smaller cross-sectional area will produce: |
| A. | less heat |
| B. | more conductance |
| C. | less resistance |
| D. | more heat |
| Answer» E. | |
| 34. |
What type of resistors have a tolerance rating of 5% or greater? |
| A. | precision |
| B. | SIP |
| C. | general-purpose |
| D. | wirewound |
| Answer» D. wirewound | |
| 35. |
What are the parts of a rheostat? |
| A. | wiper and resistor track |
| B. | solenoid and armature |
| C. | contact and wire wound |
| D. | center tape and wiper |
| Answer» B. solenoid and armature | |
| 36. |
Resistivity is measured in cmil.Ω/ft. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 37. |
With Ohm's law, no change in resistance means that current and voltage will be: |
| A. | directly proportional |
| B. | unable to produce energy |
| C. | the same |
| D. | inversely proportional |
| Answer» B. unable to produce energy | |
| 38. |
A conductor's cross-sectional area in circular mils for inch is: |
| A. | 500 cmils |
| B. | 100,000 cmils |
| C. | 1,000,000 cmils |
| D. | 500,000,000 cmils |
| Answer» D. 500,000,000 cmils | |
| 39. |
What is the power dissipated by a 1.2 k resistor with 12 volts across it? |
| A. | 12 W |
| B. | 1.2 W |
| C. | .12 W |
| D. | 12 mW |
| Answer» D. 12 mW | |
| 40. |
How much energy is stored if 6.24 x 1018 electrons are stored in 4 volts? |
| A. | 4 joules |
| B. | 1.56 x 1018 electrons |
| C. | 1.56 coulombs |
| D. | 2.496 x 1019 electrons |
| Answer» B. 1.56 x 1018 electrons | |
| 41. |
How many ohms of resistance allows a current of 720 A to flow when 3.6 kV is applied? |
| A. | 200 n |
| B. | 5 k |
| C. | 200 k |
| D. | 5 M |
| Answer» E. | |
| 42. |
The load resistance increases. How will the load current change? |
| A. | vary |
| B. | remain constant |
| C. | increase |
| D. | decrease |
| Answer» E. | |
| 43. |
Which is the most important step utilized when measuring resistors? |
| A. | use the highest possible scale |
| B. | keep test leads short |
| C. | zero the meter before using |
| D. | remove power from the circuit |
| Answer» E. | |
| 44. |
What value of a 1.3 k resistor as measured by a digital voltmeter would be considered within tolerance? |
| A. | 1234 |
| B. | 1235 |
| C. | 1366 |
| D. | 1367 |
| Answer» C. 1366 | |
| 45. |
A color code of orange, orange, orange is for what ohmic value? |
| A. | 22 kilohms |
| B. | 3300 ohms |
| C. | 44000 ohms |
| D. | 33 kilohms |
| Answer» E. | |
| 46. |
What resistor type is found in SIPs and DIPs? |
| A. | metal film |
| B. | wirewound |
| C. | metal oxide |
| D. | thick film |
| Answer» E. | |
| 47. |
In a resistive circuit, if the voltage increases, the current will increase. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 48. |
What happens to current and resistance if the voltage doubles? |
| A. | Current doubles and resistance doubles. |
| B. | Current doubles and resistance is halved. |
| C. | Current remains the same and resistance doubles. |
| D. | Current doubles and resistance remains the same. |
| Answer» E. | |
| 49. |
What is the ratio of 13 to 47 expressed in percent? |
| A. | 0.0276 |
| B. | 0.277 |
| C. | 0.036 |
| D. | 0.361 |
| Answer» C. 0.036 | |
| 50. |
The power rating of a resistor is __________ related to __________. |
| A. | directly, the type of cooling used |
| B. | indirectly, the type of material used |
| C. | directly, its surface area |
| D. | indirectly, the color coding |
| Answer» D. indirectly, the color coding | |