Use of transistor as an amplifier works in the:

1.  Cut off region

2.  Saturation region

3.  Passive region

4.  Active region

Subtopic:  Applications of Transistor (OLD NCERT) |
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For a transistor amplifier, the power gain and voltage gain are 150 and 10 respectively. The current gain is-

1.  110 

2.  115

3.  15

4.  1500

 

 

Subtopic:  Applications of Transistor (OLD NCERT) |
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The conductivity of an n-type semiconductor whose density of conduction electrons is ne, Density of holes is nh, Mobility of conduction electrons is meand Mobility of holes is mh, will be

1.  enemh + neme 

2.  eneme + nhme  

3.  eneme + mh  

4.  eneme + nhmh 

Subtopic:  Types of Semiconductors |
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A transistor is used in common emitter mode in an amplifier circuit. When a signal of 10 mV is added to the base-emitter voltage, the base current changes by 15 μA and the collector current changes by 1.5 mA. The current gain \(\beta\) will be:

1.  50

2.  48

3.  100

4.  200

Subtopic:  Applications of Transistor (OLD NCERT) |
 91%
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The current through an ideal \(\mathrm{p\text-n}\) junction diode shown in the circuit will be:

 

1. \(5~\text A\)  2. \(0.2~\text A\) 
3. \(0.6~\text A\)  4. zero
Subtopic:  PN junction |
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In the given circuit power 
developed in 1 resistor is

     

1.  36 mW

2.  12 mW

3.  144 mW

4.  64 mW

 

Subtopic:  Applications of PN junction |
 68%
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In a common emitter transistor amplifier, the audio signal vlotage across the collector is 3V. The resistance of collector is 3kΩ. If current gain is 100 and the base resistance is 2kΩ, the voltage and power gain of the amplifier is 

(1) 200 and 1000

(2) 15 and 200

(3) 150 and 15000

(4) 20 and 2000

Subtopic:  Transistor (OLD NCERT) |
 84%
From NCERT
NEET - 2017
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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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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 |
 91%
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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 |
 70%
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NEET - 2015
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