MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 29 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When there is 12 mA of current through a 1.2 kΩ resistor, the voltage across the resistor is%! |
| A. | 14.4 V |
| B. | 1.4 V |
| C. | 100 V |
| D. | 10 V |
| Answer» B. 1.4 V | |
| 2. |
The formula for finding voltage when resistance and current are known is V = I/R.%! |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
The formula for finding resistance when current and voltage are known is R = I/V.%! |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
How much resistance is needed to draw 17.6 mA from a 12 volt source?%! |
| A. | 212 Ω |
| B. | 6.8 kΩ |
| C. | 68 Ω |
| D. | 680 Ω |
| Answer» E. | |
| 5. |
Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor?%! |
| A. | 4 Ω |
| B. | 400 Ω |
| C. | 4 kΩ |
| D. | 4.4 Ω |
| Answer» D. 4.4 ≈í¬© | |
| 6. |
You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed?%! |
| A. | 9 V |
| B. | 900 mV |
| C. | 0 V |
| D. | 18 V |
| Answer» B. 900 mV | |
| 7. |
If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be?%! |
| A. | 8 V |
| B. | 320 V |
| C. | 3.2 V |
| D. | 32 V |
| Answer» E. | |
| 8. |
Ohm's law describes how current is related to voltage and resistance.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
The ampere is the unit of resistance.%! |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
If 24 V are applied across a resistor and there are 10.9 mA of current, the resistance is%! |
| A. | 220 kΩ |
| B. | 22 kΩ |
| C. | 2.2 kΩ |
| D. | 220 Ω |
| Answer» D. 220 ≈í¬© | |
| 11. |
Four amperes of current are measured through a 24 Ω resistor connected across a voltage source. How much voltage does the source produce?%! |
| A. | 960 V |
| B. | 9.6 V |
| C. | 96 V |
| D. | 8 V |
| Answer» D. 8 V | |
| 12. |
When 12 V are applied across a 68 Ω resistor, the current is%! |
| A. | 816 mA |
| B. | 17.6 mA |
| C. | 176 mA |
| D. | 8.16 mA |
| Answer» D. 8.16 mA | |
| 13. |
What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?%! |
| A. | 183 Ω |
| B. | 18.3 Ω |
| C. | 66 Ω |
| D. | 6.6 Ω |
| Answer» B. 18.3 ≈í¬© | |
| 14. |
A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.%! |
| A. | 40 Ω |
| B. | 4 Ω |
| C. | 2 Ω |
| D. | 20 Ω |
| Answer» E. | |
| 15. |
How much current is produced by a voltage of 18 kV across a 15 kΩ resistance?%! |
| A. | 1.2 A |
| B. | 12 A |
| C. | 120 mA |
| D. | 12 mA |
| Answer» B. 12 A | |
| 16. |
*$_Approximately how much current flows through a 3.3 MO resistor across a 30 V source?? |
| A. | 9 µA |
| B. | 90 µA |
| C. | 900 µA |
| D. | 9000 µA |
| Answer» B. 90 ¬¨¬µA | |
| 17. |
*$_How much voltage is needed to produce 2.5 A of current through a 200 Ω resistor?? |
| A. | 50 V |
| B. | 500 V |
| C. | 80 V |
| D. | 8 V |
| Answer» C. 80 V | |
| 18. |
*$_What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?? |
| A. | 9.7 Ω |
| B. | 97 Ω |
| C. | 23 Ω |
| D. | 230 Ω |
| Answer» E. | |
| 19. |
%_According to Ohm's Law_% |
| A. | V is directly proportional to I |
| B. | V is inversely proportional to I |
| C. | V is directly proportional to vI |
| D. | All of the above |
| Answer» B. V is inversely proportional to I | |
| 20. |
%_A current of 200 µA through a 6.8 kΩ resistor produces a voltage drop of_% |
| A. | 34.4 V |
| B. | 340 V |
| C. | 13.6 V |
| D. | 1.36 V |
| Answer» E. | |
| 21. |
%_How much resistance is required to limit the current from a 12 V battery to 3.6 mA?_% |
| A. | 3.3 kΩ |
| B. | 33 kΩ |
| C. | 2.2 kΩ |
| D. | 22 kΩ |
| Answer» B. 33 k≈í¬© | |
| 22. |
_If 750 µA is flowing through 11 kΩ of resistance, what is the voltage drop across the resistor?$? |
| A. | 8.25 V |
| B. | 82.5 V |
| C. | 14.6 V |
| D. | 146 V |
| Answer» B. 82.5 V | |
| 23. |
_An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately$? |
| A. | 385 Ω |
| B. | 38.5 Ω |
| C. | 3.1 Ω |
| D. | 31 Ω |
| Answer» E. | |
| 24. |
_The formula to find I when the values of V and R are known is$? |
| A. | I = VR |
| B. | I = R/V |
| C. | V = IR |
| D. | I = V/R |
| Answer» E. | |
| 25. |
Approximately how many milli-amperes of current flow through a circuit with a 40 V source and 6.8 kΩ of resistance?? |
| A. | 27.2 mA |
| B. | 59 mA |
| C. | 5.9 mA |
| D. | 590 mA |
| Answer» D. 590 mA | |
| 26. |
A resistance of 3.3 MO is connected across a 500 V source. The resulting current is approximately? |
| A. | 15.1 µA |
| B. | 151 µA |
| C. | 66 mA |
| D. | 660 mA |
| Answer» C. 66 mA | |
| 27. |
The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately? |
| A. | 112 Ω |
| B. | 11.2 Ω |
| C. | 1.2 Ω |
| D. | 18 Ω |
| Answer» B. 11.2 ≈í¬© | |
| 28. |
A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange and silver? |
| A. | 2 mA |
| B. | 2.2 mA |
| C. | 214 mA |
| D. | 21.4 mA |
| Answer» C. 214 mA | |
| 29. |
What is the voltage source for a circuit carrying 2 A of current through a 36 Ω resistor?$ |
| A. | 1.8 V |
| B. | 18 V |
| C. | 7.2 V |
| D. | 72 V |
| Answer» E. | |