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Energy Band theory
Types of Semiconductors
PN junction
Applications of PN junction
Rectifier
Logic gates
Q. No.
A full wave rectifier circuit consists of two \(\mathrm{p\text-n}\) junction diodes, a centre-tapped transformer, capacitor and a load resistance. Which of these components remove the ac ripple from the rectified output?
1. load resistance
2. a centre-tapped transformer
3. \(\mathrm{p\text-n}\) junction diodes
4. capacitor
Subtopic:  Rectifier |
 58%
From NCERT
NEET - 2023
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Given below are two statements:
Statement I: Photovoltaic devices can convert optical radiation into electricity.
Statement II: The Zener diode is designed to operate under reverse bias in the breakdown.
 
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
Subtopic:  Applications of PN junction |
 78%
From NCERT
NEET - 2023
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For the following logic gate, the truth table is: 
       
1.
\(\mathrm A\) \(\mathrm B\) \(\mathrm C\)
\(0\) \(0\) \(0\)
\(0\) \(1\) \(0\)
\(1\) \(0\) \(0\)
\(1\) \(1\) \(1\)
2.
\(\mathrm A\) \(\mathrm B\) \(\mathrm C\)
\(0\) \(0\) \(1\)
\(0\) \(1\) \(1\)
\(1\) \(0\) \(1\)
\(1\) \(1\) \(0\)
3.
\(\mathrm A\) \(\mathrm B\) \(\mathrm C\)
\(0\) \(0\) \(0\)
\(0\) \(1\) \(1\)
\(1\) \(0\) \(1\)
\(1\) \(1\) \(1\)
4.
\(\mathrm A\) \(\mathrm B\) \(\mathrm C\)
\(0\) \(0\) \(1\)
\(0\) \(1\) \(0\)
\(1\) \(0\) \(1\)
\(1\) \(1\) \(0\)
Subtopic:  Logic gates |
 71%
From NCERT
NEET - 2023
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The given circuit is equivalent to:
 
1.
2.
3.
4.
Subtopic:  Logic gates |
 68%
From NCERT
NEET - 2023
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A \(\mathrm{p} \text-\)type extrinsic semiconductor is obtained when Germanium is doped with:
1. antimony
2. phosphorous
3. arsenic
4. boron
Subtopic:  Types of Semiconductors |
 76%
From NCERT
NEET - 2023
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The above figure shows the circuit symbol of a transistor. Select the correct statements given below:
(A) The transistor has two segments of p-type semiconductor separated by a segment of n-type semiconductor.
(B) The emitter is of moderate size and heavily doped.
(C) The central segment is thin and lightly doped.
(D) The emitter base junction is reverse biased in common emitter amplifier circuit.
 
1. (C) and (D)
2. (A) and (D)
3. (A) and (B)
4. (B) and (C)
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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 |
 67%
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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In the given circuits \((a),\) \((b),\) and \((c),\) the potential drop across the two \({\mathrm{p\text-n}}\) junctions is equal in:

            
1. both circuits \((a)\) and \((c)\)
2. circuit \((a)\) only
3. circuit \((b)\) only
4. circuit \((c)\) only
Subtopic:  PN junction |
 65%
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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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Select Chapter Topics:
filter
Energy Band theory
Types of Semiconductors
PN junction
Applications of PN junction
Rectifier
Logic gates
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