The resonant frequency of the wein bridge oscillator of given in figure, is

1.  19597 Hz

2.  1592.35 Hz

3.  3120.7 Hz

4.  4777 Hz.

View Answer  
4
Correct Answer :

3120.7 Hz


Explanation :
No Explanation available for this question

RC network shown in the given figure can prove maximum theoretical phase shift of

1.  900

2.  1800

3.  2700

4.  3600

View Answer  
4
Correct Answer :

1800


Explanation :
No Explanation available for this question

If an amplifier with resistive negative feedback has two left half planes poles in its open transfer function then amplifier

1.  Will always be unstable at high frequencies

2.  Will be stable for all frequencies

3.  May be unstable, depending upon the feedback factor

4.  Will oscillate at low frequencies.

View Answer  
4
Correct Answer :

Will be stable for all frequencies


Explanation :
No Explanation available for this question

A high Q-quartz crystal exhibits series resonance at the frequency ωB and parallel resonance at ωp. then

1.  ωs is very close but less than ωp

2.  ωs

3.  ωs is very close, but greater than ωp

4.  ωs>> ωp

View Answer  
4
Correct Answer :

ωs is very close but less than ωp


Explanation :
No Explanation available for this question

In a common emitter amplifier, the unbypassing emitter resistance provides

1.  Voltage-shunt feedback

2.  Current-series feedback

3.  Negative-voltage feedback

4.  Positive-current feedback.

View Answer  
4
Correct Answer :

Negative-voltage feedback


Explanation :
No Explanation available for this question

Given figure represents ac equivalent circuit of a parallel voltage feedback amplifier stage. If hfe, common collector operations respectively at Q, then current gain(I0/It) of this stage is

1.  

2.  hfe

3.  

4.  hfe.

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

An amplifier with mid-band gain |A| =500 has negative feedback β= .If upper cut-off without feedback were at 60 Hz, then with feedback it would become

1.  10 KHz

2.  12 KHz

3.  300 KHz

4.  360 KHz.

View Answer  
4
Correct Answer :

360 KHz.


Explanation :
No Explanation available for this question

Feedback factor for the circuit shown in the given figure is

1.  9/100

2.  9/10

3.  1/9

4.  1/100

View Answer  
4
Correct Answer :

1/100


Explanation :
No Explanation available for this question

If differential amplifier has a differential gain of 90,000.CMRR=80 dB, then common mode gain is

1.  2

2.  1

3.  1/2

4.  0.

View Answer  
4
Correct Answer :

2


Explanation :
No Explanation available for this question

In the OP-AMP circuit shown in the given figure V0 is given by

1.  2VS

2.  -2VS

3.  3VS

4.  -3VS.

View Answer  
4
Correct Answer :

3VS


Explanation :
No Explanation available for this question
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