Photo voltaic emf of a Ge photo voltaic cell is of the order of

1.  0.1volt

2.  0.5volt

3.  1.1volt

4.  1.72 volt

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4
Correct Answer :

1.1volt


Explanation :
No Explanation available for this question

Photo voltaic emf of a Si photovoltaic cell is of the order of

1.  0.1volt

2.  0.5 volt

3.  1.1volt

4.  1.72volt

View Answer  
4
Correct Answer :

0.5 volt


Explanation :
No Explanation available for this question

Conversion efficiency of a silicon solar cell is about

1.  5%

2.  10%

3.  14%

4.  25%

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4
Correct Answer :

14\%


Explanation :
No Explanation available for this question

LED gives off visible light from

1.  region of depletion layer

2.  p region alone

3.  n region alone

4.  both p and n regions

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4
Correct Answer :

p region alone


Explanation :
No Explanation available for this question

For 1≤t≤2, the phase deviation is

1.  500πt rad

2.  250 π(1+ 2t) rad

3.  200 πt rad

4.  0

View Answer  
4
Correct Answer :

250 π(1+ 2t) rad


Explanation :
No Explanation available for this question

The emf across a photovoltaic cell is approximately proportional to

1.  F

2.  √F

3.  ln F

4.  F2

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4
Correct Answer :

√F


Explanation :
No Explanation available for this question

LEDs fabricated from GA As emit radiation in the

1.  ultra violet region

2.  infrared region

3.  visible region

4.  none of these

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4
Correct Answer :

infrared region


Explanation :
No Explanation available for this question

LEDs fabricated from Ga As permit radiation in the

1.  ultraviolet region

2.  infrared region

3.  visible region

4.  none of these

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4
Correct Answer :

visible region


Explanation :
No Explanation available for this question

Let message signal, m(t) = cos(4 π103t), and carrier signal, c(t) =5cos(2 πx106t) are used to generate a FM signal. If peak frequency deviation of the generated FM signal is three times the transmission bandwidth of the AM signal, then coefficient of the term cos(2π(1008x103)t) in the FM signal would be

1.  5J4(3)

2.  5/2J8(3)

3.   5/2J8 (4)

4.  5J4(6)

View Answer  
4
Correct Answer :

5J4(6)


Explanation :
No Explanation available for this question

In a vector diode using alloy junction, the transition capacitance is proportional to

1.  Vj2

2.  1/Vj

3.  1/√Vj

4.  1/ Vj2 Where VJ is the magnitude of reverse junction voltage

View Answer  
4
Correct Answer :

Vj2


Explanation :
No Explanation available for this question
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