In BJT Colpitts oscillator, angular frequency W equals

1.  ω0

2.  

3.  

4.  None of these

5.  1600

6.  3600

7.  6400

8.  14400

View Answer  
8
Correct Answer :

3600


Explanation :
No Explanation available for this question

In Stimulated emission, the rate of stimulation emission depends both on the intensity of the ___ and on the __ of atoms in the upper state

1.  External field, number

2.  External field, energy

3.  Energy, number

4.  Energy, velocity

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4
Correct Answer :

External field, number


Explanation :
No Explanation available for this question

Amplification in case of lasers, because of stimulated transition is

1.  Phase coherent

2.  Phase incoherent

3.  Partly coherent

4.  Partly incoherent

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4
Correct Answer :

Phase coherent


Explanation :
No Explanation available for this question

In BJT Clapp oscillator, angular frequency of oscillation ω equals

1.  

2.  

3.  

4.  None of these

View Answer  
4
Correct Answer :


Explanation :
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In RC phase shift oscillator using FET & 3 section RC phase network, the condition for sustained oscillation is Where n=Rd/R

1.  β>6

2.   β>29

3.  β>4n+23+(29/n)

4.  β>23+(29/n)

5.  4

6.  10

7.  15

8.  16

View Answer  
8
Correct Answer :

16


Explanation :
No Explanation available for this question

if I1=αI2 and current in same branch is i.if β→0 then what would be multiplication factor

1.  1/1+α

2.  1/1-α

3.  1+α

4.  1-α

View Answer  
4
Correct Answer :

1/1+α


Explanation :
No Explanation available for this question

BJT Wien Bridge oscillator has angular frequency of oscillation in radians/sec equal to

1.   1/(√2R1C1R2C2)

2.  (√6)/ (√R1C1R2C2)

3.  2/(√R1C1R2C2)

4.  1/(√R1C1R2C2)

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4
Correct Answer :

1/(√R1C1R2C2)


Explanation :
No Explanation available for this question

Power consumed by the middle 2resistor due to the voltage source and current is

1.   0.5W and 2W

2.  2W and 2W

3.  2W and 2W

4.  0.5W and 0.5W

5.  101

6.  107v

7.  111

8.  185

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8
Correct Answer :

185


Explanation :
No Explanation available for this question

Relation between Einstein’s coefficients A21 and B21 is

1.  A21/ B21= n03/2c3

2.  A21/ B21= h3/2c3

3.  A21/ B21= hw3/2c3

4.  A21/ B21= 2hw3/c3

View Answer  
4
Correct Answer :

A21/ B21= 2hw3/c3


Explanation :
No Explanation available for this question

Determine the current through the branch AB of network shown below.

1.  3.5+j1.5

2.  3.5-j1.5

3.  1.5+j3.5

4.  1.5-j3.5

View Answer  
4
Correct Answer :

3.5+j1.5


Explanation :
No Explanation available for this question
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