MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In the circuit given below, the value of RL for maximum power transfer is ___________ |
| A. | 2.4 Ω |
| B. | 2.6 Ω |
| C. | 2.8 Ω |
| D. | 3.0 Ω |
| Answer» D. 3.0 Ω | |
| 2. |
In the circuit given below the maximum power that can be transferred from the source voltage is __________ |
| A. | 1 W |
| B. | 10 W |
| C. | 0.25 W |
| D. | 0.5 W |
| Answer» D. 0.5 W | |
| 3. |
Consider the self-inductances of two coils as 12 H and 5 H. 50 % of one flux links the other. The mutual inductance is ___________ |
| A. | 30 H |
| B. | 24 H |
| C. | 9 H |
| D. | 4.5 H |
| Answer» E. | |
| 4. |
For a series RL circuit, the impedance Z = 10 Ω at a frequency of 50 Hz. At 100 Hz the impedance is ___________ |
| A. | 10 Ω |
| B. | 20 Ω |
| C. | 1 Ω |
| D. | More than 1 Ω but less than 10 Ω 0 Ω |
| Answer» E. | |
| 5. |
Given two mutually coupled coils have a total inductance of 1500 mH, the self-inductance of each coils if the coefficient of coupling is 0.2 is ____________ |
| A. | 325 mH |
| B. | 255 mH |
| C. | 625 mH |
| D. | 550 mH |
| Answer» D. 550 mH | |
| 6. |
Given two voltages, V1 = sin (ωt + 60°) and V2 = cos (ωt). Which of the following is correct? |
| A. | V1 is leading V2 by 15° |
| B. | V1 is leading V2 by 30° |
| C. | V2 is leading V1 by 60° |
| D. | V2 is leading V1 by 30° |
| Answer» D. V2 is leading V1 by 30° | |
| 7. |
A current waveform is of the shape of a right angled triangle with period of t = 1 sec. Given a resistance R = 1 Ω. The average power is __________ |
| A. | 1 W |
| B. | 0.5 W |
| C. | 0.333 W |
| D. | 0.111 W |
| Answer» E. | |
| 8. |
Consider a resistive network circuit, having 3 sources of 18 W, 50 W and 98 W respectively and a resistance R. When all source act together the maximum and minimum power is ____________ |
| A. | 98 W, 18 W |
| B. | 166 W, 18 W |
| C. | 450 W, 2 W |
| D. | 166 W, 2 W |
| Answer» D. 166 W, 2 W | |
| 9. |
Consider an electric motor having resistance of 10 Ω, 20 Ω and 30 Ω respectively. The percentage of energy dissipated by 10 Ω earthing plate is ____________ |
| A. | More than 50% of total energy |
| B. | Less than 50% of total energy |
| C. | Depends on the materials of the three plates |
| D. | May be more or less than 50% of total energy |
| Answer» B. Less than 50% of total energy | |
| 10. |
For a practical voltage source, which of the following is correct? |
| A. | Cannot be less than source voltage |
| B. | Cannot be higher than source voltage |
| C. | Is always less than source voltage |
| D. | Is always equal to source voltage |
| Answer» C. Is always less than source voltage | |
| 11. |
For a series RL circuit having L = 5 H, current = 1 A (at an instant). The energy stored in magnetic field is ___________ |
| A. | 3.6 J |
| B. | 2.5 J |
| C. | 1.5 J |
| D. | 3 J |
| Answer» C. 1.5 J | |
| 12. |
The charge associated with a bulb rated as 20 W, 200 V and used for 10 minutes is ____________ |
| A. | 36 C |
| B. | 60 C |
| C. | 72 C |
| D. | 50 C |
| Answer» C. 72 C | |
| 13. |
The star equivalent resistance of 3 resistors having each resistance = 5 Ω is ____________ |
| A. | 1.5 Ω |
| B. | 1.67 Ω |
| C. | 3 Ω |
| D. | 4.5 Ω |
| Answer» C. 3 Ω | |
| 14. |
Given a wire of resistance R Ω. The resistance of a wire of the same material and same weight and double the diameter is ___________ |
| A. | 0.5 R |
| B. | 0.25 R |
| C. | 0.125 R |
| D. | 0.0625 R |
| Answer» E. | |
| 15. |
The temperature coefficient of a metal as the temperature increases will ____________ |
| A. | Decreases |
| B. | Increases |
| C. | Remains unchanged |
| D. | Increases and remains same |
| Answer» B. Increases | |