MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The most suitable device for high-frequency inversion in switching mode power supply is ______ |
| A. | GTO |
| B. | BJT |
| C. | MOSFET |
| D. | IGBT |
| Answer» D. IGBT | |
| 2. |
The slope of the I-V curve is 87°. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line. |
| A. | 0.0524 Ω |
| B. | 0.0254 Ω |
| C. | 0.0543 Ω |
| D. | 0.0648 Ω |
| Answer» B. 0.0254 Ω | |
| 3. |
Calculate the value of the frequency if the time period of the signal is 0 sec. |
| A. | infinity |
| B. | 0.4 Hz |
| C. | 0.2 Hz |
| D. | 0.78 Hz |
| Answer» B. 0.4 Hz | |
| 4. |
When a UJT is used for triggering an SCR, then the wave shape of voltage obtained from the UJT circuit will be ____________ |
| A. | Square |
| B. | Pulse |
| C. | Trapezoidal |
| D. | Saw-tooth |
| Answer» C. Trapezoidal | |
| 5. |
Displacement is a ____________ quantity. |
| A. | Scalar |
| B. | Vector |
| C. | Scalar and Vector |
| D. | Tensor |
| Answer» C. Scalar and Vector | |
| 6. |
Calculate the velocity of the wheel if the angular speed is 25 rad/s and radius is 10 m. |
| A. | 250 m/s |
| B. | 260 m/s |
| C. | 270 m/s |
| D. | 240 m/s |
| Answer» B. 260 m/s | |
| 7. |
The unit of Magento-motive force is Ampere-turns. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Armature reaction is demagnetizing in nature due to purely lagging load. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Calculate the terminal voltage of Permanent Magnet DC motor having a resistance of 2 Ω and a full load current of 5 A with 20 V back e.m.f. |
| A. | 30 V |
| B. | 25 V |
| C. | 20 V |
| D. | 31 V |
| Answer» B. 25 V | |