If α=0.98 Ico=6μA and Iβ=100μA for a transistor, then value of Ic will be

1.  2.3mA

2.  3.1mA

3.  4.6mA

4.   5.2mA

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4
Correct Answer :

5.2mA


Explanation :
No Explanation available for this question

From a pack of regular playing cards,two cards are drawn at random.What is the probability that both cards will be kings,if the first card is NOT replaced

1.  1/26

2.  1/52

3.  1/169

4.  1/221

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4
Correct Answer :

1/221


Explanation :
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For the given input, output waveform across the diode shown the figure will be

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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A box contains 10 screws,3 of which are defective.Two screws are drawn at random with replacement.The probability that none of the two screws is defective will be

1.  100%

2.  50%

3.  49%

4.  None of these

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4
Correct Answer :

None of these


Explanation :
No Explanation available for this question

A fair coin is tossed three times in succession.If the first toss produces a head,then the probability of getting exactly two heads in three tosses is

1.  1/8

2.  1/2

3.  3/8

4.  3/4

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4
Correct Answer :

3/4


Explanation :
No Explanation available for this question

The base-biased transistor circuit of figure is subjected to increase in junction temperature from 250C to 750. If β increases from 100 to 150 with rising temperature, percentage change in a-point value(Ic,VCE) over the temperature range will be (assume VBE reacts at 0.7V)

1.  -40%

2.  -44.57%

3.  -46.57%

4.   -48.0%

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4
Correct Answer :

-44.57\%


Explanation :
No Explanation available for this question

In a frequency distribution,mid value of a class is 15 and class interval is 4.The lower limit of the class is

1.  14

2.  13

3.  12

4.  10

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4
Correct Answer :

13


Explanation :
No Explanation available for this question

An n-channel JFET having a pinch-off voltage(Vp) of -5V shows a transconductance (gm) of 1 mA/V, When applied gate-to-source voltage (VGS) is -3V. Its maximum transconductance (in mA/V) will be

1.  1.5

2.  2.0

3.  2.5

4.   3.0

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4
Correct Answer :

2.5


Explanation :
No Explanation available for this question

Following marks were obtained by the students in a test:81,72,90,90,86,85,92,70,71,83,89,95,85,79,62.Range of the marks is

1.  9

2.  17

3.  27

4.  33

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4
Correct Answer :

33


Explanation :
No Explanation available for this question

Standard deviation for 7,9,11,13,15 is

1.  2.4

2.  2.5

3.  2.7

4.  2.8

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4
Correct Answer :

2.8


Explanation :
No Explanation available for this question
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