MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
A coil of 300 turns is wound on a non-magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductor of the coil corresponding to a magnetizing electric current of 3 A will be? |
| A. | 37.68 H |
| B. | 47.68 H |
| C. | 113.04 H |
| D. | 120.58 H |
| Answer» D. 120.58 H | |
| 2. |
An alternating voltage V = 150 sin(314)t is supplied to a device which offers a resistance of 20 in forward direction of electric current while preventing the flow of electric current in reverse direction. The form factor is ___________ |
| A. | 0.57 |
| B. | 0.318 |
| C. | 1.414 |
| D. | 1.57 |
| Answer» E. | |
| 3. |
Potential of earth is 50 V. If the potential difference between anode and cathode (earthed) is measured as 150 V, actual voltage on anode is __________ |
| A. | 0 V |
| B. | 100 V |
| C. | 200 V |
| D. | 250 V |
| Answer» D. 250 V | |
| 4. |
The rms value of the sine wave is 100 A. Its peak value is ____________ |
| A. | 70.7 A |
| B. | 141.4 A |
| C. | 150 A |
| D. | 282.8 A |
| Answer» C. 150 A | |
| 5. |
The form factor of sinusoidal alternating electric current is ___________ |
| A. | 0 |
| B. | 1 |
| C. | 1.11 |
| D. | 1.15 |
| Answer» D. 1.15 | |
| 6. |
The two windings of a transformer have an inductor of 2 H each. If mutual inductor between them is also 2 H, then which of the following is correct? |
| A. | Turns ratio of the transformer is also 2 |
| B. | Transformer is an ideal transformer |
| C. | It is a perfect transformer |
| D. | It is a perfect as well as an ideal transformer |
| Answer» D. It is a perfect as well as an ideal transformer | |
| 7. |
A 3 V DC supply with an internal resistance of 2 supplies a passive non-linear resistance characterized by the relation VNL = (I_{NL}^{2} ). The power dissipated in the resistance is ___________ |
| A. | 1 W |
| B. | 1.5 W |
| C. | 2.5 W |
| D. | 3 W |
| Answer» B. 1.5 W | |
| 8. |
The resistance of a strip of copper of rectangular cross section is 2 . A metal of resistivity twice that of a copper is coated on its upper surface to a thickness equal to that of copper strip. The resistance of composite strip will be _________ |
| A. | ( frac{3}{4} ) |
| B. | ( frac{4}{3} ) |
| C. | ( frac{3}{2} ) |
| D. | 6 |
| Answer» C. ( frac{3}{2} ) | |
| 9. |
The energy stored in the magnetic field at a solenoid 100 cm long and 10 cm diameter wound with 1000 turns of wire carrying an electric current of 10 A, is ___________ |
| A. | 1.49 J |
| B. | 0.49 J |
| C. | 0.1 J |
| D. | 1 J |
| Answer» C. 0.1 J | |
| 10. |
The basic elements of an electric circuit are _____________ |
| A. | R, L and C |
| B. | Voltage |
| C. | Current |
| D. | Voltage as well as current |
| Answer» B. Voltage | |