MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For the same peak value which of the following wave will have the highest r.m.s. value? |
| A. | Square wave |
| B. | Half wave rectified sine wave |
| C. | Triangular wave |
| D. | Sine wave |
| Answer» B. Half wave rectified sine wave | |
| 2. |
The phase difference between voltage and current wave through a circuit element is given as 30 . The essential condition is that |
| A. | Both waves must have same frequency |
| B. | Both waves must have identical peak values |
| C. | Both waves must have zero value at the same time |
| D. | None of the above |
| Answer» B. Both waves must have identical peak values | |
| 3. |
The product of apparent power and cosine of the phase angle between circuit voltage and current is |
| A. | True power |
| B. | Reactive power |
| C. | Volt-amperes |
| D. | Instantaneous power |
| Answer» B. Reactive power | |
| 4. |
The series and parallel resonance on L-C circuit differs in that_________? |
| A. | Series resistance needs a low-resistance source for sharp rise in current |
| B. | Series resonance needs a high-resistance source for sharp increase in current |
| C. | Parallel resonance needs a low-resistance source for a sharp in crease in impedance |
| D. | Parallel resonance needs a low-resistance source for a sharp rise in line current |
| Answer» B. Series resonance needs a high-resistance source for sharp increase in current | |
| 5. |
The phosphors for which of the following pair are 180 out of phase for VL, VC and VR______? |
| A. | Vc and VR |
| B. | VL and VR |
| C. | Vc and VL |
| D. | None of the above |
| Answer» D. None of the above | |
| 6. |
Skin effect occurs when a conductor carries current at_______ frequencies |
| A. | Very low |
| B. | Low |
| C. | Medium |
| D. | High |
| Answer» E. | |