In BJT Colpitts oscillator, angular frequency W equals

1.  ω0

2.

3.

4.  None of these

5.  1600

6.  3600

7.  6400

8.  14400

8

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

4

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

4

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

4

Explanation :
No Explanation available for this question

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

8

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

4

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)

4

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

8

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

4

A21/ B21= 2hw3/c3

Explanation :
No Explanation available for this question

1.  3.5+j1.5

2.  3.5-j1.5

3.  1.5+j3.5

4.  1.5-j3.5

4