MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In the figure below, the values of the resistance R1 and inductance L1 of a coil are to be calculated after the bridge is balanced. The values are _________________ |
| A. | 375 Ω and 75 mH |
| B. | 75 Ω and 150 mH |
| C. | 37.5 Ω and 75 mH |
| D. | 75 Ω and 75 mH |
| Answer» B. 75 Ω and 150 mH | |
| 2. |
In Maxwell’s capacitance bridge for calculating unknown inductance, the various values at balance are, R1 = 300 Ω, R2 = 700 Ω, R3 = 1500 Ω, C4 = 0.8 μF. The values of R1, L1 and Q factor, if the frequency is 1100 Hz are ____________ |
| A. | 240 Ω, 0.12 H, 3.14 |
| B. | 140 Ω, 0.168 H, 8.29 |
| C. | 140 Ω, 0.12 H, 5.92 |
| D. | 240 Ω, 0.36 H, 8.29 |
| Answer» C. 140 Ω, 0.12 H, 5.92 | |
| 3. |
In the Owen’s bridge shown in below figure, Z1 = 200∠60°, Z2 = 400∠-90°, Z3 = 300∠0°, Z4 = 400∠30°. Then, |
| A. | Bridge is balanced with given impedance values |
| B. | Bridge can be balanced, if Z4 = 600∠60° |
| C. | Bridge can be balanced, if Z3 = 400∠0° |
| D. | Bridge cannot be balanced with the given configuration |
| Answer» E. | |
| 4. |
In the figure given below, a 220 V 50 Hz supplies a 3-phase balanced source. The pressure Coil (PC) and Current Coil (CC) of a watt-meter are connected to the load as shown. The watt-meter reading is _________ |
| A. | Zero |
| B. | 1600 W |
| C. | 242 W |
| D. | 400 W |
| Answer» D. 400 W | |
| 5. |
A resistor of 10 kΩ with a tolerance of 5% is connected in parallel with 5 kΩ resistors of 10% tolerance. The tolerance limit is __________ |
| A. | 9% |
| B. | 12.4% |
| C. | 8.33% |
| D. | 7.87% |
| Answer» D. 7.87% | |
| 6. |
The voltage drop across a standard resistor of 0.2 Ω is balanced at 83 cm. The magnitude of the current, if the standard cell emf of 1.53 V is balanced at 42 m is ___________ |
| A. | 13.04 A |
| B. | 10 A |
| C. | 14.95 A |
| D. | 12.56 A |
| Answer» D. 12.56 A | |
| 7. |
In the Wheatstone bridge shown below, if the resistance in each arm is increased by 0.05%, then the value of Vout will be? |
| A. | 50 mV |
| B. | Zero |
| C. | 5mV |
| D. | 0.1mV |
| Answer» C. 5mV | |
| 8. |
An RLC series circuit has a resistance R of 20Ω and a current which lags behind the applied voltage by 45°. If the voltage across the inductor is twice the voltage across the capacitor, the value of inductive resistance is ____________ |
| A. | 10 Ω |
| B. | 20 Ω |
| C. | 40 Ω |
| D. | 60 Ω |
| Answer» D. 60 Ω | |
| 9. |
If the 3-phase balanced source in the given figure delivers 1500 W at a leading power factor of 0.844, then the value of ZL is approximately __________ |
| A. | 90∠32.44° |
| B. | 80∠32.44° |
| C. | 80∠-32.44° |
| D. | 90∠-32.44° |
| Answer» E. | |