MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
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. | |
| 2. |
For a series RL circuit, the impedance Z = 10 at a frequency of 50 Hz. At 100 Hz the impedance is ___________ |
| A. | 10 |
| B. | 20 |
| C. | 1 |
| D. | More than 1 but less than 10 0 |
| Answer» E. | |
| 3. |
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 | |
| 4. |
Given two voltages, V1 = sin ( t + 60 ) and V2 = cos ( t). Which of the following is correct? |
| A. | V<sub>1</sub> is leading V<sub>2</sub> by 15 |
| B. | V<sub>1</sub> is leading V<sub>2</sub> by 30 |
| C. | V<sub>2</sub> is leading V<sub>1</sub> by 60 |
| D. | V<sub>2</sub> is leading V<sub>1</sub> by 30 |
| Answer» D. V<sub>2</sub> is leading V<sub>1</sub> by 30 | |
| 5. |
A current waveform is of the shape of a right angled triangle with period of t = 1 sec. Given a resistance R = 1 . The average power is __________ |
| A. | 1 W |
| B. | 0.5 W |
| C. | 0.333 W |
| D. | 0.111 W |
| Answer» E. | |
| 6. |
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 | |
| 7. |
Consider an electric motor having resistance of 10 , 20 and 30 respectively. The percentage of energy dissipated by 10 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 | |
| 8. |
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 | |
| 9. |
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 | |
| 10. |
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 | |
| 11. |
The star equivalent resistance of 3 resistors having each resistance = 5 is ____________ |
| A. | 1.5 |
| B. | 1.67 |
| C. | 3 |
| D. | 4.5 |
| Answer» C. 3 | |
| 12. |
Given a wire of resistance R . 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. | |
| 13. |
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 | |