Determine the density of donor atoms , which have to be added to an intrinsic semiconductor smple to produce an n type semiconductor of conductivity 5smple to produce an n type semiconductor of conductivity 5

1.  0.81*1016/cm3

2.  Data insufficient

3.  0.9*105/m3

4.  1.5*102/m3

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4
Correct Answer :

0.81*1016/cm3


Explanation :
No Explanation available for this question

The saturation current of a p-n junction Ge diode is 250mA/m3 at 300K.Find voltage that would have to be applied across the junction to cause a forward current density of 105A.m2 to flow

1.  1.5mA

2.  2.002mA

3.  3.5mA

4.  None of these

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4
Correct Answer :

3.5mA


Explanation :
No Explanation available for this question

A silicon n-p-n transistor with β =100 and ICO =20*10-9A is connected in common emitter mode.Find the collector current foa a base current of 0.02mA

1.  1.5mA

2.  2.002mA

3.  3.5mm

4.  None of these

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4
Correct Answer :

2.002mA


Explanation :
No Explanation available for this question

For an channel JFET with pinch off voltage 5.9V and donor concentration of 1015cm-15.If dielectric constant of Si is 12, the channel width of silicon is

1.  5.6*10-4cm

2.  36mm

3.  1.028*10-2m

4.  2.72*10-4cm

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4
Correct Answer :

2.72*10-4cm


Explanation :
No Explanation available for this question

Find the minimum width of the depletion region for an ideal MOS capacitor on p-type si with Na=1016cm-3,φs=68.9*10-6.Relative dielectric constant of si 11.8

1.  0.4

2.  0.3

3.  0.5

4.  None of these

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4
Correct Answer :

None of these


Explanation :
No Explanation available for this question

PIV of a full wave bridge type rectifier should be at least

1.  Vm

2.  2 Vm

3.  Vm/2

4.  None of these

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4
Correct Answer :

Vm


Explanation :
No Explanation available for this question

Fast diffusion I silicon are

1.  Group I & VIII elements

2.  Group II &III elements

3.  Group III & IV elements

4.  None of these

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4
Correct Answer :

Group I & VIII elements


Explanation :
No Explanation available for this question

A diode is reverse biased at 3V has junction capacitor of 20 pF. When the reverse bias is increased to 24V, junction capacitor becomes 10pF.The doing of the diode

1.  Step graded

2.  Linearly graded

3.  Partially graded

4.  None of these

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4
Correct Answer :

Step graded


Explanation :
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For the voltage amplifier, which of the following is correct

1.  Low input impedance, low output impedance

2.   High input impedance, low output impedance

3.  Low input impedance, High output impedance

4.  High input impedance, High output impedance

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4
Correct Answer :

High input impedance, low output impedance


Explanation :
No Explanation available for this question

The below figure shows on of the amplifier model having RsR0 Which of the following represents correct amplifier model

1.  Current amplifier

2.  Voltage amplifier

3.  Tansconductance amplifier

4.  Tran Resistance amplifier

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4
Correct Answer :

Voltage amplifier


Explanation :
No Explanation available for this question
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