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Q. No.

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%
Level 2: 60%+
NEET - 2023
Hints
The given circuit is equivalent to:
 
1.
2.
3.
4.
Subtopic:  Logic gates |
 69%
Level 2: 60%+
NEET - 2023
Hints
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%
Level 2: 60%+
NEET - 2023
Hints
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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%
Level 2: 60%+
NEET - 2023
Hints
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%
Level 3: 35%-60%
NEET - 2023
Hints
Identify the equivalent logic gate represented by the circuit given below:

1. \(\text{OR}\)
2. \(\text{NOR}\)
3. \(\text{AND}\)
4. \(\text{NAND}\)
Subtopic:  Logic gates |
 64%
Level 2: 60%+
NEET - 2022
Hints
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The incorrect statement about the property of a Zener diode is:
1. Zener voltage remains constant at the breakdown.
2. It is designed to operate under reverse bias.
3. The depletion region formed is very wide.
4. \(\mathrm{p}\) and \(\mathrm{n}\) regions of the Zener diode are heavily doped.
Subtopic:  Applications of PN junction |
 58%
Level 3: 35%-60%
NEET - 2022
Hints

The circuit represents a full wave bridge rectifier when switch \(S\) is open. The output voltage \((V_0)\) pattern across \(R_L\) when \(S\) is closed:

1. 2.
3. 4.
Subtopic:  Rectifier |
Level 3: 35%-60%
NEET - 2022
Hints

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%
Level 2: 60%+
NEET - 2022
Hints
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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%
Level 2: 60%+
NEET - 2022
Hints
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