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Semiconductor Electronics
Q. No.

The peak voltage in the output of a half-wave rectifier is \(30 ~\text{V}.\) The RMS voltage of the output wave is: (assuming no distortion in wave) 
1. \(\dfrac{30}{\sqrt2}~\text{V}\) 2. \(15 ~\text{V}\)
3. \(\dfrac{15}{\sqrt2}~\text{V}\) 4. \(10 ~\text{V}\)

Subtopic:  Rectifier |
From NCERT
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The dominant contribution to current comes from holes in the case of:
1. metals
2. intrinsic semiconductors
3. \(\mathrm{p} \text-\)type extrinsic semiconductors
4. \(\mathrm{n} \text-\)type extrinsic semiconductors
Subtopic:  Types of Semiconductors |
 91%
From NCERT
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A junction diode exhibits a resistance of \(25~ \Omega\) in the forward-biased condition and \(25000 ~\Omega\) in the reverse-biased condition. Based on the given circuit configuration, what will be the current flowing through the diode?
1. \(\dfrac{1}{7}\) A 2. \(\dfrac{1}{6}\) A
3. \(\dfrac{1}{25}\) A 4. \(\dfrac{1}{180}\) A
Subtopic:  PN junction |
 87%
From NCERT
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The resistance between \(A\) and \(B\) is
           
1. \(100~\Omega\) if \(V_A>V_B\) and \(200~\Omega\) if \(V_A<V_B\)
2. \(100~\Omega\) if \(V_A<V_B\) and \(200~\Omega\) if \(V_A>V_B\)
3. \(100~\Omega\)
4. \(200~\Omega\)
Subtopic:  PN junction |
 75%
From NCERT
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In half-wave rectification, if the input frequency is \(60\) Hz, the output frequency will be:
1. \(120\) Hz 2. zero
3. \(30\) Hz 4. \(60\) Hz
Subtopic:  Rectifier |
 68%
From NCERT
NEET - 2022
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As the temperature increases, the electrical resistance:
1. decreases for conductors but increases for semiconductors.
2. increases for both conductors and semiconductors.
3. decreases for both conductors and semiconductors.
4. increases for conductors but decreases for semiconductors.
Subtopic:  Energy Band theory |
 75%
From NCERT
NEET - 2022
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The truth table for the given logic circuit is:
          
1.
\(A\) \(B\) \(C\)
\(0\) \(0\) \(0\)
\(0\) \(1\) \(1\)
\(1\) \(0\) \(0\)
\(1\) \(1\) \(1\)
2.
\(A\) \(B\) \(C\)
\(0\) \(0\) \(0\)
\(0\) \(1\) \(1\)
\(1\) \(0\) \(1\)
\(1\) \(1\) \(0\)
3.
\(A\) \(B\) \(C\)
\(0\) \(0\) \(1\)
\(0\) \(1\) \(0\)
\(1\) \(0\) \(0\)
\(1\) \(1\) \(1\)
4.
\(A\) \(B\) \(C\)
\(0\) \(0\) \(1\)
\(0\) \(1\) \(0\)
\(1\) \(0\) \(1\)
\(1\) \(1\) \(0\)
Subtopic:  Logic gates |
 61%
From NCERT
NEET - 2022
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The output of the logic circuit shown is equivalent to a/an:
        
1. \(\text{OR}\) gate
2. \(\text{NOR}\) gate
3. \(\text{AND}\) gate
4. \(\text{NAND}\) gate

Subtopic:  Logic gates |
 73%
From NCERT
NEET - 2022
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The circuit represents a full wave bridge rectifier when switch \(S\) is open. The output voltage \((\text V_0)\) pattern across \(R_L\) when \(S\) is closed:

1.   2.
3. 4.
Subtopic:  Rectifier |
From NCERT
NEET - 2022
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Given below are two statements: 
Assertion (A): The value of current through \(\mathrm{p\text-n}\) junction in the given figure will be \(10~\text{mA}.\)
 
Reason (R): In the above figure, \(\mathrm{p\text-}\)side is at a higher potential than \(\mathrm{n\text-}\)side.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  PN junction |
From NCERT
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Semiconductor Electronics
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