The electron and hole concentration in an intrinsic semiconductor are ni  per cm3 at 300 K.Now,  if acceptor  impurities are  introduced with a concentration of NA per cm3  (where NA>> ni), the electron concentration per cm3 at 300 K will be

1.  ni

2.  ni + NA

3.  NA - ni

4.  (ni2/NA)

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4
Correct Answer :

(ni2/NA)


Explanation :
No Explanation available for this question

In a p+ n junction diode under reverse bias, the magnitude of electric field is maximum at

1.  the edge of the depletion region on the p-side

2.  the edge of the depletion region on the n-side

3.  the p+ n junction

4.  the centre of the depletion region on the n-side

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4
Correct Answer :

the p+ n junction


Explanation :
No Explanation available for this question

The correct full wave rectifier circuit is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

In a transconductance, amplifier, it is desirable to have

1.  a large input resistance and a large output resistance

2.  a large input resistance and a small output resistance

3.  a small input resistance and a large output resistance

4.  a small input resistance and a small output resi

View Answer  
4
Correct Answer :

a large input resistance and a large output resistance


Explanation :
No Explanation available for this question

In a transconductance, amplifier, it is desirable to have

1.  a large input resistance and a large output resistance

2.  a large input resistance and a small output resistance

3.  a small input resistance and a large output resistance

4.  a small input resistance and a small output resi

View Answer  
4
Correct Answer :

a large input resistance and a large output resistance


Explanation :
No Explanation available for this question

X = 01110 and Y = 11001 are two 5-bit binary numbers represented in two's complement format. The sum of X and Y represented in two's complement format using 6 bits is

1.  100111

2.  001000

3.  000111

4.  101001

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4
Correct Answer :

000111


Explanation :
No Explanation available for this question

The Boolean function Y = AB + CD is to be realized using only 2- in put NAND gates. The minimum number of gates required is

1.  2

2.  3

3.  4

4.  5

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4
Correct Answer :

3


Explanation :
No Explanation available for this question

If the closed-loop transfer function of a control system is given as T(s) = (s - 5)/((s + 2)(s + 3)), then it is

1.  an unstable system

2.  an uncontrollable system

3.  a minimum phase system

4.  a non-minimum phase system

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4
Correct Answer :

a non-minimum phase system


Explanation :
No Explanation available for this question

If the Laplace transform of a signal y(t) is Y(s) = 1/(s(s - 1)), then its final value is

1.  -1

2.  0

3.  1

4.  unbounded

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4
Correct Answer :

-1


Explanation :
No Explanation available for this question

If R(τ)  is  the  autocorrelation  function  of  a  real, wide-sense  stationary  random  process, then which of the following is NOT true

1.  R(τ) = R(-τ)

2.  | R(τ) | ≤ R(0) 

3.  R(τ) = -R(-τ)

4.  The mean square value of the process is R(0)

View Answer  
4
Correct Answer :

R(τ) = -R(-τ)


Explanation :
No Explanation available for this question
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