MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Signals & Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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 | |
| 2. |
In a series RLC circuit for lower frequency and for higher frequency, power factors are respectively ______________ |
| A. | Leading, Lagging |
| B. | Lagging, Leading |
| C. | Independent of Frequency |
| D. | Same in both cases |
| Answer» B. Lagging, Leading | |
| 3. |
The signal X (t) = (e^{j(2t + frac{ }{4})} ) is ________________ |
| A. | Energy signal with E<sub> </sub> = 2 |
| B. | Power signal with P<sub> </sub> = 2 |
| C. | Power signal with P<sub> </sub> = 1 |
| D. | Energy signal with E<sub> </sub> = 1 |
| Answer» D. Energy signal with E<sub> </sub> = 1 | |
| 4. |
The signal Y (t) = e-2t u (t) is _______________ |
| A. | Power signal with P<sub> </sub> = ( frac{1}{4} ) |
| B. | Power signal with P<sub> </sub> = ( frac{1}{2} ) |
| C. | Energy signal with E<sub> </sub> = ( frac{1}{4} ) |
| D. | Energy signal with E<sub> </sub> = 0 |
| Answer» C. Energy signal with E<sub> </sub> = ( frac{1}{4} ) | |
| 5. |
The odd component of the signal Y (t) = ajt is _______________ |
| A. | Sin t |
| B. | Cos t |
| C. | Sinh t |
| D. | Cosh t |
| Answer» B. Cos t | |
| 6. |
The even component of the signal Y (t) = ajt is _________________ |
| A. | Sin t |
| B. | Cos t |
| C. | Sinh t |
| D. | Cosh t |
| Answer» C. Sinh t | |
| 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 circuit tuned to a frequency of 1.5 MHz and having an effective capacitance of 150 pF. In this circuit, the current falls to 70.7 % of its resonant value. The frequency deviates from the resonant frequency by 5 kHz. Q factor is? |
| A. | 50 |
| B. | 100 |
| C. | 150 |
| D. | 200 |
| Answer» D. 200 | |