MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 9 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 a series RLC circuit R = 10 k , L = 0.5 H and C = ( frac{1}{250} ) F. Calculate the frequency when the circuit is in a state of resonance. |
| A. | 4.089 10<sup>4</sup> Hz |
| B. | ( frac{11111.1}{ } )Hz |
| C. | 4.089 10<sup>4</sup> Hz |
| D. | ( frac{1}{ } ) 10<sup>4</sup> Hz |
| Answer» C. 4.089 10<sup>4</sup> Hz | |
| 2. |
A series RLC circuit has a resonance frequency of 1 kHz and a quality factor Q = 50. If R and L are doubled and C is kept same, the new Q of the circuit is? |
| A. | 25.52 |
| B. | 35.35 |
| C. | 45.45 |
| D. | 20.02 |
| Answer» C. 45.45 | |
| 3. |
A circuit with a resistor, inductor and capacitor in series is resonant with frequency f Hz. If all the component values are now doubled, then the new resonant frequency will be? |
| A. | 2 f |
| B. | f |
| C. | ( frac{f}{4} ) |
| D. | ( frac{f}{2} ) |
| Answer» E. | |
| 4. |
A 440 V, 50 HZ AC source supplies a series LCR circuit with a capacitor and a coil. If the coil has 100 m resistance and 15 mH inductance, then at a resonance frequency of 50 Hz, the Q factor of the circuit is? |
| A. | 82.63 |
| B. | 47.115 |
| C. | 27.38 |
| D. | 92.38 |
| Answer» C. 27.38 | |
| 5. |
A 440 V, 50 HZ AC source supplies a series LCR circuit with a capacitor and a coil. If the coil has 100 m resistance and 15 mH inductance, then at a resonance frequency of 50 Hz, what is the value of the capacitor? |
| A. | 676 F |
| B. | 575 F |
| C. | 591 F |
| D. | 610 F |
| Answer» B. 575 F | |
| 6. |
At what frequency will the current lead the voltage by 30 in a series circuit with R = 10 and C = 25 F? |
| A. | 11.4 kHz |
| B. | 4.5 kHz |
| C. | 1.1 kHz |
| D. | 24.74 kHz |
| Answer» B. 4.5 kHz | |
| 7. |
A 440 V, 50 HZ AC source supplies a series LCR circuit with a capacitor and a coil. If the coil has 100 m resistance and 15 mH inductance, then at a resonance frequency of 50 Hz, the half power frequencies of the circuit are? |
| A. | 50.53 Hz, 49.57 Hz |
| B. | 52.12 HZ, 49.8 Hz |
| C. | 55.02 Hz, 48.95 Hz |
| D. | 50 HZ, 49 Hz |
| Answer» B. 52.12 HZ, 49.8 Hz | |
| 8. |
A series RLC circuit has R = 50 , L = 0.01 H and C = 0.04 10-6 F. System voltage is 100 V. At this frequency, the circuit impedance is? |
| A. | 50 j2.5 |
| B. | 50 j2.8 |
| C. | 50 + j2.5 |
| D. | 50 + j2.8 |
| Answer» B. 50 j2.8 | |
| 9. |
A series RLC circuit has R = 50 , L = 0.01 H and C = 0.04 10-6 F. System voltage is 100 V. The frequency, at which the maximum voltage appears across the capacitor, is? |
| A. | 5937.81 Hz |
| B. | 7370 Hz |
| C. | 7937.81 Hz |
| D. | 981 Hz |
| Answer» D. 981 Hz | |