If the low pass filter described by the difference equation y(n)=0.9y(n-1)+0.1x(n) is converted into a high pass filter, then what is the frequency response of the high pass filter?

If hlp(n) denotes the impulse response of a low pass filter with frequency response Hlp(ω), then what is the frequency response of the high pass filter in terms of Hlp(ω)?

A

Hlp(ω-π/2)

B

Hlp(ω+π/2)

C

Hlp(ω-π)

D

Hlp(ω+π)

Consider a circuit as shown in figure The 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

Which of the following statements are correct? 1. A lowpass filter passes low frequencies and stops high frequencies. 2. A highpass filter passes high frequencies and rejects low frequencies 3. A bandpass filter passes frequencies within a frequency band and attenuates frequencies outside the band. 4. A bandstop filter passes frequencies within the band and blocks/attenuates frequencies outside a frequency band.

A

1, 2 and 4 only

B

1, 3 and 4 only

C

2, 3 and 4 only

D

1, 2 and 3 only

Find the gain and phase angle of the second order low pass filter? Where pass band gain of the filter is 5, frequency and the high cut-off frequency of the filter are 3000Hz and 1kHz.

A

None of the mentioned

B

Gain magnitude = -1.03dB , φ =63.32o

C

Gain magnitude = -5.19dB , φ =71.56o

D

Gain magnitude = -4.94dB , φ =90o

If H(s) is the transfer function of a analog low pass normalized filter and Ωu is the desired pass band edge frequency of new low pass filter, then which of the following transformation has to be performed?

A

s → s / Ωu

B

s → s.Ωu

C

s → Ωu/s

D

None of the mentioned

How can a first order low pass filter can be converted into second order low pass filter

A

By adding LC network

B

By adding RC network

C

By adding RC || LC network

D

None of the mentioned

The resonant frequency of m-derived low pass filter in terms of the cut-off frequency of low pass filter is?

A

fc/√(1-m2)

B

fc/√(1+m2)

C

fc/(π√(1-m2))

D

fc/(π√(1+m2))

It is better to perform the mapping from an analog low pass filter into a digital low pass filter by either of these mappings and then perform the frequency transformation in the digital domain.

A

True

B

False

The low-pass active filter shown in the figure has a cut-off frequency of 2 kHz and a pass band gain of 1.5. The values of the resistors are
Electronics mcq question image

A

R₁ = 10 k$$\Omega $$; R₂ = 1.3 $$\Omega $$

B

R₁ = 30 k$$\Omega $$; R₂ = 1.3 $$\Omega $$

C

R₁ = 10 k$$\Omega $$; R₂ = 1.7 $$\Omega $$

D

R₁ = 30 k$$\Omega $$; R₂ = 1.7 $$\Omega $$

Below are given two sets, Set - I which gives modalities of operant conditioning and Set - II which provides the types of reinforcement, the types of responses (responses made or withheld) and the presence or absence of cue. Match the two sets and indicate your answer by choosing from the code : Set - I (Modalities of operant conditioning procedures) Set – II (Conditions and contexts) (a) Reward training (i) Positive reinforcement, response made, with cue present (b) Escape training (ii) Positive reinforcement, response withheld with cue absent (c) Discriminated omission training (iii) Positive reinforcement, response made with cue absent (d) Active avoidance (iv) Negative reinforcement, response made with training (e) Punishment training (v) Positive reinforcement, response withheld with cue present (vi) Negative reinforcement, response withheld with cue absent

A

(a) - (iii), (b) - (iv), (c) - (v), (d) - (i) - (e) - (vi)

B

(a) - (i), (b) - (ii), (c) - (iii), (d) - (iv) - (e) - (v)

C

(a) - (ii), (b) - (iii), (c) - (iv), (d) - (v) - (e) - (vi)

D

(a) - (i), (b) - (iii), (c) - (iv), (d) - (v) - (e) - (vi)

If the low pass filter described by the difference equation y(n)=0.9y(n-1)+0.1x(n) is converted into a high pass filter, then what is the frequency response of the high pass filter?

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