MCQOPTIONS
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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. |
A 50 μF capacitor, when connected in series with a coil having resistance of 40Ω, resonates at 1000 Hz. The circuit is in resonating condition. The voltage across the coil is __________ |
| A. | 100.31 V |
| B. | 200.31 V |
| C. | 300.31 V |
| D. | 400.31 V |
| Answer» B. 200.31 V | |
| 2. |
A 50 μF capacitor, when connected in series with a coil having resistance of 40Ω, resonates at 1000 Hz. The circuit current if the applied voltage is 100 V for the resonant circuit is ___________ |
| A. | 2.5 A |
| B. | 3.5 A |
| C. | 4.5 A |
| D. | 0.5 A |
| Answer» B. 3.5 A | |
| 3. |
An ideal transformer is rated as 2400/120 V, 9.6 kVA and has 50 turns on the secondary side. The number of turns on the primary side is ____________ |
| A. | 1000 |
| B. | 2000 |
| C. | 3000 |
| D. | 4000 |
| Answer» B. 2000 | |
| 4. |
A 50 μF capacitor, when connected in series with a coil having a resistance of 40Ω, resonates at 1000 Hz. The circuit is in resonating condition. The voltage across the capacitor is __________ |
| A. | 8.04 V |
| B. | 7.96 V |
| C. | 5.68 V |
| D. | 1.25 V |
| Answer» D. 1.25 V | |
| 5. |
The time constant for the given circuit under resonance condition will be? |
| A. | \(\frac{1}{9}\) s |
| B. | \(\frac{1}{4}\) s |
| C. | 4 s |
| D. | 9 s |
| Answer» D. 9 s | |
| 6. |
The frequency for the given circuit when the circuit is in a state of resonance will be? |
| A. | 1 rad/s |
| B. | 2 rad/s |
| C. | 3 rad/s |
| D. | 4 rad/s |
| Answer» D. 4 rad/s | |
| 7. |
In a series circuit with R = 10Ω and C = 25 μF, at what frequency will the current lead the voltage by 30°? |
| A. | 11.4 kHz |
| B. | 4.5 kHz |
| C. | 1.1 kHz |
| D. | 24.74 kHz |
| Answer» B. 4.5 kHz | |
| 8. |
The RL circuit in the below figure is fed from a constant magnitude, variable frequency sinusoidal voltage source VIN. At 50 Hz, the R and L elements each have a voltage drop Vrms. If the frequency of the source is changed to 25 Hz, the new voltage drop across R is ___________ |
| A. | \(\sqrt{\frac{5}{8}}\) Vrms |
| B. | \(\sqrt{\frac{2}{3}}\) Vrms |
| C. | \(\sqrt{\frac{8}{5}}\) Vrms |
| D. | \(\sqrt{2}\) Vrms |
| Answer» D. \(\sqrt{2}\) Vrms | |
| 9. |
An ideal capacitor is charged to a voltage V and connected at t=0 across an ideal inductor L. If we take ω = \(\frac{1}{\sqrt{LC}}\), the voltage across the capacitor at time t>0 will be? |
| A. | V |
| B. | V cos(ωt) |
| C. | V sin(ωt) |
| D. | Ve-ωt cos(ωt) |
| Answer» C. V sin(ωt) | |
| 10. |
The circuit shown in the figure below will act as an ideal source with respect to terminal A and B when the frequency is ___________ |
| A. | Zero |
| B. | 1 rad/s |
| C. | 4 rad/s |
| D. | 16 rad/s |
| Answer» D. 16 rad/s | |
| 11. |
For the circuit shown in the figure below, the value of R for critical damping will be? |
| A. | 10.5 Ω |
| B. | 8.57 Ω |
| C. | 3.5 Ω |
| D. | 3 Ω |
| Answer» C. 3.5 Ω | |
| 12. |
In the circuit shown in the figure, if ω = 40 rad/s, then Zin is _____________ |
| A. | 4.77 – j1.15 Ω |
| B. | 2.96 – j0.807 Ω |
| C. | 2.26 – j3.48 Ω |
| D. | 2.26 – j3.48 Ω |
| Answer» C. 2.26 – j3.48 Ω | |
| 13. |
An ideal transformer is rated as 2400/120 V, 9.6 kVA and has 50 turns on the secondary side. The turns ratio is ____________ |
| A. | 0.04 |
| B. | 0.05 |
| C. | 0.06 |
| D. | 0.07 |
| Answer» C. 0.06 | |
| 14. |
For a series RLC circuit, excited by voltage V = 20 sinωt. The values of R = 2 Ω, L = 1mH and C = 0.4 µF. The quality factor and bandwidth of the circuit is ______________ |
| A. | 25, 2 |
| B. | 30, 5 |
| C. | 40, 10 |
| D. | 50, 2 |
| Answer» B. 30, 5 | |
| 15. |
For a series RLC circuit, excited by voltage V = 20 sinωt. The values of R = 2 Ω, L = 1mH and C = 0.4 µF. The resonant frequency of the circuit is ______________ |
| A. | 20 krad/s |
| B. | 30 krad/s |
| C. | 40 krad/s |
| D. | 50 krad/s |
| Answer» E. | |