In the given figure, the potential difference between A and B is:

1. 0 2. 5 volt
3. 10 volt 4. 15 volt

Subtopic:  PN junction |
 56%
From NCERT
PMT - 2000
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In a common-emitter transistor amplifier, the audio signal voltage across the collector is 3 V. The resistance of the collector is 3 kΩ. If the current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier are:

1. 200 and 1000

2. 15 and 200

3. 150 and 15000

4. 20 and 2000

Subtopic:  Applications of Transistor (OLD NCERT) |
 78%
From NCERT
NEET - 2017
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Which one of the following represents forward biased circuit?

1. 

2. 

3. 

4. 

Subtopic:  PN junction |
 84%
From NCERT
NEET - 2017
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The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance R1 will be

   

(1) 2.5 A                     

(2) 10.0 A

(3) 1.43 A                   

(4) 3. 13 A

Subtopic:  Applications of PN junction |
 82%
From NCERT
NEET - 2016
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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 |
 85%
From NCERT
NEET - 2016
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An n-p-n transistor is connected in the common base configuration in a given amplifier. A load resistance of 800Ω is connected in the collector circuit and the voltage drop across it is 0.8 V. If the current amplification factor is 0.96 and the input resistance of the circuits is 192 Ω the voltage gain and the power gain of the amplifier will respectively be

1. 3.69,3.84
2. 4,4
3. 4,3.69
4. 4,3.84

Subtopic:  Applications of Transistor (OLD NCERT) |
 64%
From NCERT
NEET - 2016
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If in a p-n junction, a square input signal of 10 V is applied as shown, then the output across RL will be:
              

1. 2.
3. 4.
Subtopic:  Rectifier |
 65%
From NCERT
NEET - 2015
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In the given figure, a diode D is connected to an external resistance R = 100 Ω  and an e.m.f of 3.5 V. If the barrier potential developed across the diode is 0.5 V, the current in the circuit will be


1. 30mA

2. 40mA

3. 20mA

4. 35mA

Subtopic:  PN junction |
 71%
From NCERT
NEET - 2015
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The given graph represents the V-I characteristic for a semiconductor device. Which of the following statement is correct?

1. It is a V-I characteristic for a solar cell where point A represents open-circuit voltage and point B represents short-circuit current.
2. It is for a solar cell and points A and B represent open-circuit voltage and current respectively.
3. It is for a photodiode and points A and B represent open-circuit voltage and current respectively.
4. It is for a LED and points A and B represent open-circuit voltage and short circuit current respectively.
Subtopic:  Applications of PN junction |
 67%
From NCERT
NEET - 2014
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The barrier potential of a p-n junction depends on

(i)type of semiconductor material

(ii)amount of doping

(iii)temperature

Which one of the following is correct

1. (i) and (ii)only

2. (ii) only

3. (ii) and (iii)only

4. (i),(ii) and (iii)

Subtopic:  PN junction |
 75%
From NCERT
NEET - 2014
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