MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 12 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. |
A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the final value of the voltage across the inductor. |
| A. | 5V |
| B. | 10V |
| C. | 0 V |
| D. | 20V |
| Answer» D. 20V | |
| 2. |
A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the initial value of the voltage across the inductor. |
| A. | 5V |
| B. | 10V |
| C. | 0 V |
| D. | 20V |
| Answer» E. | |
| 3. |
A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the value of voltage 1s after the switch is closed. |
| A. | 5.4V |
| B. | 10.8V |
| C. | 0 V |
| D. | 2.7V |
| Answer» E. | |
| 4. |
A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the initial value of the current in the circuit. |
| A. | 5A |
| B. | 10A |
| C. | 0 A |
| D. | 20A |
| Answer» D. 20A | |
| 5. |
The discharging time constant of a circuit consisting of an inductor is the time taken for the voltage in the inductor to become __________ % of the initial voltage. |
| A. | 33 |
| B. | 63 |
| C. | 37 |
| D. | 36 |
| Answer» E. | |
| 6. |
Among the following, which is the right formula for decay in an inductive circuit? |
| A. | i=I(1-e<sup>-t</sup>/time constant) |
| B. | i=I(1-e<sup>t</sup> /time constant) |
| C. | i=(1-e<sup>-t</sup> /time constant) |
| D. | i=I(e<sup>-t</sup> /time constant) |
| Answer» E. | |
| 7. |
Calculate the inductance in an inductive circuit whose time constant is 2s and the resistance is 5 ohm. |
| A. | 10H |
| B. | 20H |
| C. | 5H |
| D. | 15H |
| Answer» B. 20H | |
| 8. |
A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the value of current 1s after the switch is closed. |
| A. | 5.44A |
| B. | 4.32A |
| C. | 6.56A |
| D. | 2.34A |
| Answer» C. 6.56A | |
| 9. |
A coil has a resistance of 4 ohms and an inductance of 2H. It is connected to a 20V dc supply. Calculate the final value of the current in the circuit. |
| A. | 5A |
| B. | 10A |
| C. | 15A |
| D. | 20A |
| Answer» B. 10A | |
| 10. |
A coil has a resistance of 4 ohms and an inductance of 2H. Calculate its time constant. |
| A. | 1s |
| B. | 2s |
| C. | 0.5s |
| D. | 5s |
| Answer» D. 5s | |
| 11. |
What is Helmholtz equation? |
| A. | i=I(1-e<sup>Rt/L</sup>) |
| B. | i=I(1-e<sup>-Rt/L</sup>) |
| C. | i=I(1+e<sup>-Rt/L</sup>) |
| D. | i=I(e<sup>-Rt/L</sup>) |
| Answer» C. i=I(1+e<sup>-Rt/L</sup>) | |
| 12. |
What is the total applied voltage in an inductive circuit? |
| A. | V=Ri+Ldi/dt |
| B. | V=Ri+di/dt |
| C. | V=i+Ldi/dt |
| D. | V=R+Ldi/dt |
| Answer» B. V=Ri+di/dt | |