The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance \(R_1\) will be:
       

1. \(2.5~\text A\)  2. \(10.0~\text A\) 
3. \(1.43~\text A\)  4. \(3.13~\text A\) 

Subtopic:  PN junction |
 88%
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NEET - 2016

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What is the output Y in the following circuit, when all the three inputs A, B, C are first 0 and then 1? 
                        

1.  0, 1

2.  0, 0

3.  1, 0

4.  1, 1

Subtopic:  Logic gates |
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To get output 1 for the following circuit, the correct choice for the input is:
1. A = 1, B = 0, C = 0
2. A = 1, B = 1, C = 0
3. A = 1, B = 0, C = 1
4. A = 0, B = 1, C = 0

Subtopic:  Logic gates |
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Consider the junction diode as an ideal. The value of current flowing through AB is: 

1. 10-2A
2. 10-1A
3. 10-3A
4. 0A
Subtopic:  PN junction |
 70%
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NEET - 2016

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Which logic gate is represented by the following combination of logic gates? 
1. OR
2. NAND
3. AND
4. NOR
Subtopic:  Logic gates |
 57%
From NCERT
NEET - 2015

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In an n-type semiconductor, which of the following statement is true:
 
1. Electron are minority carriers and pentavalent atoms are dopants.
2. Holes are minority carriers and pentavalent atoms are dopants.
3. Holes are majority carriers and trivalent atoms are dopants.
4. Electrons are majority carriers and trivalent atoms are dopants.

 

Subtopic:  Types of Semiconductors |
 74%
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AIPMT - 2013

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The output(X) of the logic circuit shown in figure will be: 


1. X = A·B¯

2. X = A.B

3. X = A+B¯

4. X = A¯¯·B¯¯

 

Subtopic:  Logic gates |
 64%
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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 A

2. zero

3. 0.25 A

4. 0.5 A

Subtopic:  PN junction |
 81%
From NCERT
AIPMT - 2012

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C and Si both have the same lattice structure, having 4 bonding electrons in each. However, C is an insulator whereas Si is an intrinsic semiconductor. This is because:

1. in the case of C, the valence band is not completely filled at absolute zero temperature.

2. in the case of C, the conduction band is partly filled even at absolutely zero temperature.

3. the four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si, they lie in the third.

4. the four bonding electrons in the case of C lie in the third orbit, whereas for Si, they lie in the fourth orbit.

Subtopic:  Types of Semiconductors |
 72%
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NEET - 2012

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Transfer characteristic [output voltage (Vo) vs input voltage (Vi)] for a base biased transistor in CE configurations 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

 

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