MCQOPTIONS
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MCQOPTIONS
This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Power Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The attenuation rate is also called? |
| A. | Roll off |
| B. | Roll in |
| C. | Envelope delay |
| D. | Ripple |
| Answer» B. Roll in | |
| 2. |
What is the loss the filter introduces to the signals in the passband called? |
| A. | passband loss |
| B. | Insertion loss |
| C. | Attenuation |
| D. | Degradation |
| Answer» C. Attenuation | |
| 3. |
What is the value of notch frequency if the values of resistance and capacitance are 100 kV and 0.02 μF? |
| A. | 79.6Hz |
| B. | 21.5Hz |
| C. | 82.4Hz |
| D. | 40Hz |
| Answer» B. 21.5Hz | |
| 4. |
Notch filters and band reject filters are the same. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
What is the value of resistor for a high pass RC filter to produce a cutoff frequency of3.4KHz if C = 0.047μF? |
| A. | 654Ω |
| B. | 1000Ω |
| C. | 996Ω |
| D. | 752Ω |
| Answer» D. 752Ω | |
| 6. |
Find the cut off frequency for an RC low pass filter of R=8.2Ω and C=0.0033μF? |
| A. | 6KHz |
| B. | 5.88KHz |
| C. | 4.26KHz |
| D. | 7.91KHz |
| Answer» C. 4.26KHz | |
| 7. |
What is the type of filter shown in the figure? |
| A. | Low pass filter |
| B. | High pass filter |
| C. | Band pass filter |
| D. | All pass filter |
| Answer» B. High pass filter | |
| 8. |
An RC coupling circuit is an example of what type of filter? |
| A. | Low pass filter |
| B. | High pass filter |
| C. | Band pass filter |
| D. | All pass filter |
| Answer» C. Band pass filter | |
| 9. |
What type of filter produces a predictable phase shift characteristic in all frequencies? |
| A. | Band pass filters |
| B. | High pass filters |
| C. | Low pass filters |
| D. | All pass filters |
| Answer» E. | |
| 10. |
What are filters created by using resistors and capacitors or inductors and capacitors called? |
| A. | Active filters |
| B. | Passive filters |
| C. | Continuous filters |
| D. | Differential filters |
| Answer» C. Continuous filters | |
| 11. |
What is a filter? |
| A. | Frequency selective circuit |
| B. | Amplitude selective circuit |
| C. | Frequency damping circuit |
| D. | Amplitude damping circuit |
| Answer» B. Amplitude selective circuit | |
| 12. |
If z0 is a zero of a (real-valued) linear - phase FIR filter then following is/are also zero/zeros of a (real-valued) linear - phases FIR filter, |
| A. | \(z_0^*\) |
| B. | \(\frac{1}{{{z_0}}}\) |
| C. | \(\frac{1}{{{z_0}}}\), \(z_0^*\) and \(\frac{1}{{z_0^*}}\) |
| D. | \(\frac{1}{{{z_0}}}\) and \(\frac{1}{{z_0^*}}\) |
| Answer» D. \(\frac{1}{{{z_0}}}\) and \(\frac{1}{{z_0^*}}\) | |
| 13. |
A digital filter is characterized by the equationY[n] + y[n – 1] = x[n -2]. The filter is |
| A. | Linear and Time variant |
| B. | Causal and Stable |
| C. | Non-causal and Time invariant |
| D. | Linear, Causal and Unstable |
| Answer» E. | |
| 14. |
A digital signal processing system is described by the expression:y(n) = 2x(n) + x(n – 1) + 2y(n – 1)The system is: |
| A. | A stable FIR filter |
| B. | A stable IIR filter |
| C. | An unstable FIR filter |
| D. | An unstable IIR filter |
| Answer» E. | |
| 15. |
An nth order recursive filter generally requires |
| A. | n – previous inputs and (n – 1) previous outputs. |
| B. | (n – 1) previous inputs and n – previous outputs. |
| C. | (n – 1) previous inputs and (n – 1) previous outputs. |
| D. | n previous inputs and n previous outputs. |
| Answer» E. | |
| 16. |
A single-phase diode B-2 rectifier is fed from a 250 V, 50 Hz source & connected to a load of R = 400 Ω.$# |
| A. | |
| B. | 156.4 μF |
| C. | 500 μF |
| Answer» D. | |
| 17. |
A capacitor filter or C filter can be used in a rectifier by connecting it |
| A. | in parallel with the load |
| B. | in series with the load |
| C. | in parallel with the supply |
| D. | in series with the supply |
| Answer» B. in series with the load | |
| 18. |
In case of a C filter, the AC is not allowed to pass to the load by |
| A. | offering it high impedance |
| B. | offering it low impedance |
| C. | short circuiting the AC component |
| D. | open circuiting the AC component |
| Answer» D. open circuiting the AC component | |
| 19. |
In case of an L filter connected with a rectifier in series with the load, it offers ________ impedance to ac whereas _______ resistance to dc respectively. |
| A. | high, high |
| B. | high, low |
| C. | low, high |
| D. | low, low |
| Answer» C. low, high | |
| 20. |
An L filter is connected ________ |
| A. | in series |
| B. | in parallel |
| C. | in both series and parallel |
| D. | none of the mentioned |
| Answer» B. in parallel | |
| 21. |
In practice the output from the diode rectifier has |
| A. | AC component only |
| B. | DC component only |
| C. | AC + DC component |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |