MCQOPTIONS
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MCQOPTIONS
This section includes 11 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 signal of 1 kHz is to be amplified, but the circuit board and wires pick up and store a 60 Hz component from a nearby electric line. If this component is 40 dB higher than the desired signal, what filter stopband attenuation is necessary to ensure the signal remains 20 dB above the interference level? |
| A. | High pass filter with stopband attenuation of 60 dB at 60 Hz |
| B. | LPF with SBA of 60 dB at 1 kHz |
| C. | HPF with SBA of 60 dB at 1 kHz |
| D. | Low pass filter with stopband attenuation of 60 dB at 60 Hz |
| Answer» B. LPF with SBA of 60 dB at 1 kHz | |
| 2. |
Consider the following circuits:(a) Integrating circuit(b) Active differentiation circuit(c) Notch type electrical filterArrange the above circuit models in decreasing order of their complexity. |
| A. | (a), (b), (c) |
| B. | (a), (c), (b) |
| C. | (b), (c), (a) |
| D. | (c), (b), (a) |
| Answer» E. | |
| 3. |
A low-pass filter with a cut-off frequency of 30 Hz is cascaded with a high pass filter with a cut-off frequency of 20 Hz. The resultant system of filters will function as |
| A. | an all-pass filter |
| B. | an all – stop filter |
| C. | a band stop (band-reject) filter |
| D. | a bandpass filter |
| Answer» E. | |
| 4. |
In a simple high pass RC filter if the value of the capacitor is doubled, the cut-off frequency is |
| A. | halved |
| B. | doubled |
| C. | quadrupled |
| D. | remains the same |
| Answer» B. doubled | |
| 5. |
Consider a circuit as shown in figureThe circuit is(1) Constant K low-pass filter(2) Constant K high-pass filter(3) The m-derived low-pass filter(4) The m-derived high-pass filter |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 6. |
A filter having two passbands separated by a small frequency band of zero output is of the type ________. |
| A. | band stop |
| B. | high pass |
| C. | m-derived band pass |
| D. | band pass |
| Answer» B. high pass | |
| 7. |
A system transfer function is \(H\left( s \right) = \frac{{{a_1}{s^2} + {b_1}s + {c_1}}}{{{a_2}{s^2} + {b_2}s + {c_2}}}\). If a1 = b1 = 0, and all other coefficients are positive, the transfer function represents a |
| A. | low pass filter |
| B. | high pass filter |
| C. | band pass filter |
| D. | notch filter |
| Answer» B. high pass filter | |
| 8. |
If τ is time constant and ω is the applied frequency, a low pass RC filter acts as a pure integrator when |
| A. | ωτ = 0 |
| B. | ωτ > > 1 |
| C. | ωτ = 1 |
| D. | ωτ < < 1 |
| Answer» C. ωτ = 1 | |
| 9. |
A RC high pass filter acts as differentiator when ______. |
| A. | ω τ = 0 |
| B. | ω τ = 1 |
| C. | ω τ 1 |
| D. | ω τ ≪ 1 |
| Answer» E. | |
| 10. |
In case of a high-pass filter, the transfer function should be with1) 1 pole and 1 zero2) 2 poles and 2 zero3) 2 poles and 1 zeroWhich of the above are correct? |
| A. | 1, 2, and 3 |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1 and 2 only |
| Answer» E. | |
| 11. |
An integrator circuit is also a ________ circuit. |
| A. | Low pass |
| B. | Band pass |
| C. | High pass |
| D. | Band reject |
| Answer» B. Band pass | |