# A range of Ge is doped to the extent of 1014 donor atoms/cm4.At the temperature of the sample ,the resistivity of pure Ge is 600 Ge. If the applied electrical field is 2V/cm. find the total conduction current density

1.  15.2 mA/cm

2.  52.3 mA/cm2

3.  60.5 mA/cm2

4.  Data insufficient

4

52.3 mA/cm2

Explanation :
No Explanation available for this question

# It is required to design an anti aliasing filter for an 8-bit ADC. The filter is a first order RC filter with R=1 and C=1F. The ADC is designed to span a sinusoidal signal with peak-to-peak amplitude equal to the full-scale range of the ADC.

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Explanation :
No Explanation available for this question

# A sample of intrinsic Ge at room temperature has a carrier concentration of 3.4*1019/m3,determine the hole concentration

1.  4.62*1023/m3

2.  3.25*1015/m3

3.  2.31*1016/m3

4.  38.5*1015/m3

4

2.31*1016/m3

Explanation :
No Explanation available for this question

# In a semiconductor of band gap 1.5ev, the wave length of electromagnetic radiation emmited when a conduction band electron combines with a valence band hole is

1.  8282A0

2.  1555A0

3.  6025 A0

4.  None of these

5.  350

6.  425

7.  400

8.  450

8

450

Explanation :
No Explanation available for this question

# Find the total power absorbed by the resistor in the given circuit.

1.  15W

2.  20W

3.  25W

4.  30W

4

15W

Explanation :
No Explanation available for this question

# The Work Function qφm in a semiconductor device is required to

1.  Bring an electron from outer world

2.  Remove an electron at Fermi level to Vacuum outside the metal

3.  Both (A) and (B)

4.  None of these

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Remove an electron at Fermi level to Vacuum outside the metal

Explanation :
No Explanation available for this question

# In Ge p-n junction at 300k ND=5*1018/cm3 NA=3*616/cm3 N1=1.5*1015/cm3.what is the minority electron density

1.  5000e/cm3

2.  2500e/cm3

3.  4250e/cm3

4.  3750e/cm3

5.  4

6.  9

7.  12

8.  49

8

9

Explanation :
No Explanation available for this question

# A potencial difference of 5V is applied across a uniform wire of length 50m Calculate the drift velocity of the electron through the wire .Given that the relaxation time is 10-14S

1.  0.176*10-1 ms-1

2.  0.95 ms-1

3.  1.5*10-6 ms-1

4.  None of these

4

0.176*10-1 ms-1

Explanation :
No Explanation available for this question

# A unit impulse current waveform applied to a two terminal black box produces a voltageWhat will be its voltage if the following current waveform is applied to it

1.  0.5e-t - 0.5e-3t

2.  [0.5e-3t - e-9t]u(t)

3.  0.5e-3t - e-9t

4.  [0.5e-t - 0.5e-3t]u(t)

4

[0.5e-t - 0.5e-3t]u(t)

Explanation :
No Explanation available for this question

1.  0.06V

2.  6V

3.  0.6V

4.  0.0006V

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