The input signal given to a CE amplifier having a voltage gain of 150 is Vi=2cos15t+π3. The corresponding output signal will be:

1. 30 cos 15t+π3

2. 75 cos 15t+2π3

3. 2 cos 15t+5π3

4. 300 cos 15t+4π3

Subtopic:  Applications of Transistor (OLD NCERT) |
 75%
From NCERT
NEET - 2015
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If in a \(\mathrm{p\text{-}n}\) junction, a square input signal of \(10~\text{V}\) is applied as shown, 

 
then the output across \(R_L\) will be:

1. 2.
3. 4.
Subtopic:  PN junction |
 72%
From NCERT
NEET - 2015
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Which logic gate is represented by the following combination of logic gates? 

    
1. \(\mathrm{OR}\)
2. \(\mathrm{NAND}\)
3. \(\mathrm{AND}\)
4. \(\mathrm{NOR}\)
Subtopic:  Logic gates |
 66%
From NCERT
NEET - 2015
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The given graph represents the \(\mathrm{V\text{-} I}\) characteristic for a semiconductor device.

   

Which of the following statement is correct?

1. It is a \(\mathrm{V\text{-} I}\) characteristic for the solar cell where point \(\mathrm{A}\) represents open-circuit voltage and point \(\mathrm{B}\) short circuit current.
2. It is for a solar cell and points \(\mathrm{A}\) and \(\mathrm{B}\) represent open-circuit voltage and current, respectively.
3. It is for a photodiode and points \(\mathrm{A}\) and \(\mathrm{B}\) represent open-circuit voltage and current respectively.
4. It is for a LED and points \(\mathrm{A}\) and \(\mathrm{B}\) represent open circuit voltage and short circuit current, respectively.
Subtopic:  Applications of PN junction |
 74%
From NCERT
AIPMT - 2014
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In an \(\mathrm{n\text-}\)type semiconductor, which of the following statement is true?
1. Electrons are minority carriers and pentavalent atoms are dopants.
2. Holes are minority carriers and pentavalent atoms are dopants.
3. Holes are the majority carriers and trivalent atoms are dopants.
4. Electrons are the majority carriers and trivalent atoms are dopants.

Subtopic:  Types of Semiconductors |
 79%
From NCERT
AIPMT - 2013
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In a common emitter (CE) amplifier having a voltage gain G, the transistor used has trans conductance 0.03 mho and current gain 25. If the above transistor is replaced with another one with transconductance of 0.02 mho and current gain of 20, the voltage gain will be:
1. 1.5G
2. 13G
3. 54G
4. 23G
Subtopic:  Applications of Transistor (OLD NCERT) |
 50%
From NCERT
AIPMT - 2013
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The output \((X)\) of the logic circuit shown in the figure will be: 
  
1. \(X= \overline{A\cdot B}\)
2. \(X = A\cdot B\)
3. \(X= \overline{A+ B}\)
4. \(X=\overline{\overline{A}} \cdot \overline{\overline{B}}\)

Subtopic:  Logic gates |
 76%
From NCERT
AIPMT - 2013
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Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is:
    
1. \(0.75~\text{A}\)
2. zero
3. \(0.25~\text{A}\)
4. \(0.5~\text{A}\)

Subtopic:  PN junction |
 86%
From NCERT
AIPMT - 2012
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Transfer characteristics [output voltage (Vo) vs input voltage (Vi)] for a base biased transistor in CE configurations are as shown in the figure. For using the transistor as a switch, it is used:

1. In region III

2. Both in the region (I) and (III)

3. In region II

4. In region I

Subtopic:  Transistor (OLD NCERT) |
 78%
From NCERT
AIPMT - 2012
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The symbolic representation of four gates is shown as: 
   
Pick out which ones are for AND, NAND, and NOT gates, respectively.

1.  (i), (iv), and (iii)

2.  (ii), (iii), and (iv)

3.  (ii), (iv), and (iii)

4.  (ii), (iv), and (i)

Subtopic:  Logic gates |
 88%
From NCERT
AIPMT - 2011
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