In the combination of the following gates, the output Y can be written in terms of inputs A and B as:

   

1. A.B

2. A.B+B.A

3. A.B+A.B

4. A+B

Subtopic:  Logic gates |
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In the circuit shown in the figure, the input voltage Vi is 20 V, VBE = 0, and VCE = 0. The values of IB, Iand β are given by:
           

1. IB = 40 μA, Ic = 10 mA, β = 250

2. IB = 25 μA, Ic = 5 mA, β = 200

3. IB = 20 μA, Ic = 5 mA, β = 250

4. IB = 40 μA, Ic = 5 mA, β = 125

Subtopic:  Applications of Transistor |
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In a p-n junction diode, the change in temperature due to heating:

1. affects only reverse resistance.

2. affects only forward bias.

3. does not affect the resistance of the p-n junction.

4. affects the overall V-I characteristics of a p-n junction.

Subtopic:  PN junction |
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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 |
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Which one of the following represents forward biased circuit?

1. 

2. 

3. 

4. 

Subtopic:  PN junction |
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The given electrical network is equivalent to:
 
1. OR gate

2. NOR gate

3. NOT gate

4. AND gate

Subtopic:  Logic gates |
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Which one of the following represents the forward bias diode?

1.  

2.  

3.  

4.  

Subtopic:  PN junction |
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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 |
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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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