The concentration of minority carriers in an extrinsic semiconductor under equilibrium is

1.  directly proportional to the doping concentration

2.  inversely proportional to the doping concentration

3.  directly proportional to the intrinsic concentration

4.  inversely proportional to the intrinsic concentration

View Answer  
4
Correct Answer :

inversely proportional to the doping concentration


Explanation :
No Explanation available for this question

Under  low  level  injection assumption,  the  injected minority carrier current  for an extrinsic semiconductor is essentially the

1.  diffusion current

2.  drift current

3.  recombination current

4.   induced current

View Answer  
4
Correct Answer :

diffusion current


Explanation :
No Explanation available for this question

The phenomenon known as "Early Effect" in a bipolar transistor refers to a reduction of the effective base-width caused by

1.   electron-hole recombination at the base

2.   the reverse biasing of the base-collector junction

3.  the forward biasing of emitter-base junction

4.  the early removal of stored base charge during saturation-to-cutoff switching

View Answer  
4
Correct Answer :

the reverse biasing of the base-collector junction


Explanation :
No Explanation available for this question

The  input  impedance  (Zi)  and  the  output  impedance  (Zo)  of  an  ideal  transconductance(voltage controlled current source) amplifier are

1.   Zi= 0, Zo = 0

2.  Zi= 0, Zo = ∞

3.  Zi = ∞, Zo = 0

4.  Zi= ∞, Zo = ∞

View Answer  
4
Correct Answer :

Zi= ∞, Zo = ∞


Explanation :
No Explanation available for this question

An n-channel depletion MOSFET has following two points on its ID-VGS curve (i) VGS = 0 at ID = 12 mA and (ii) VGS = -6 Volts at ID = 0 Which  of  the  following  Q-points  will  give  the  highest  trans-conductance  gain  for  small signals

1.  VGS = -6 Volts

2.  VGS = -3 Volts

3.  VGS = 0 Volts

4.  VGS = 3 Volts

View Answer  
4
Correct Answer :

VGS = 3 Volts


Explanation :
No Explanation available for this question

The  number  of  product  terms  in  the  minimized  sum-of-product  expression  obtained through the following K-map is (where, "d" denotes don't care states 1 0 0 1 0 d 0 0 0 0 d 1 1 0 0 1  

1.  2

2.  3

3.  4

4.  5

View Answer  
4
Correct Answer :

2


Explanation :
No Explanation available for this question

Let x(t) ↔ X (j ω) be Fourier Transform pair. The Fourier Transform of the signal x(5t - 3) in terms of X (jω) is given as

1.  (1/5) e-(j3ω/5) X (jω/5)

2.  (1/5) e(j3ω/5) X (jω/5)

3.  (1/5) e-j3ω X (jω/5)

4.  (1/5) ej3ω X (jω/5)

View Answer  
4
Correct Answer :

(1/5) e-(j3ω/5) X (jω/5)


Explanation :
No Explanation available for this question

If  the  region of  convergence of  x1  [n] +  x2  [n]  is  (1/3)

1.  (1/3) < | z | < 3

2.  (2/3) < | z | < 3

3.  (1/3) < | z | < (1/2)

4.  (1/3) < | z | < (2/3)

View Answer  
4
Correct Answer :

(1/3) < | z | < (2/3)


Explanation :
No Explanation available for this question

The open-loop transfer function of a unity-gain feedback control system is given by G(s) = K/((s + 1)(s+ 2))  The gain margin of the system in dB is given by

1.  0

2.  1

3.  20

4.  ∞

View Answer  
4
Correct Answer :

∞


Explanation :
No Explanation available for this question

The electric field of an electomagnetic wave propagating in the positive z-direction is given by E = âx sin(ωt - βz) + ây sin(ωt – βz + (π/2)) The wave is

1.  linearly polarized in the z-direction

2.  elliptically polarized

3.  left-hand circularly polarized

4.  right-hand circularly polarized

View Answer  
4
Correct Answer :

left-hand circularly polarized


Explanation :
No Explanation available for this question
Previous Next

Interview Questions

MongoDB
Java Script
Node JS
PHP
JQuery
Python