Given below are two statements:
Statement I: Photovoltaic devices can convert optical radiation into electricity.
Statement II: Zener diode is designed to operate under reverse bias in the breakdown.
 
1. Statement I is False but Statement II is True.
2. Both Statement I and Statement II are True.
3. Both Statement I and Statement II are False.
4. Statement I is True but Statement II is False.

Subtopic:  Applications of PN junction |
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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 |
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The given circuit is equivalent to:
        
1. 2.
3. 4.
Subtopic:  Logic gates |
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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 |
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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 |
 52%
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Identify the equivalent logic gate represented by the circuit given below:
           
1. \(\mathrm{OR}\)
2. \(\mathrm{NOR}\)
3. \(\mathrm{AND}\)
4. \(\mathrm{NAND}\)
Subtopic:  Logic gates |
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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 |
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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 |
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The output of the logic circuit shown is equivalent to a/an:
        
1. \(\mathrm{OR}\) gate
2. \(\mathrm{NOR}\) gate
3. \(\mathrm{AND}\) gate
4. \(\mathrm{NAND}\) gate

Subtopic:  Logic gates |
 71%
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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 |
 59%
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