In questions 9, the conduction process is

1.  Intrinsic

2.  extrinsic

3.  Both but mainly Extrinsic

4.  Both but mainly intrinsic

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4
Correct Answer :

Both but mainly Extrinsic


Explanation :
No Explanation available for this question

A first order linear system is initially relaxed. For a unit step signal u(t), the response is (1-e-3t) for t > 0. If signal 3u(t)+δ(t) is applied to same initially relaxed system, the response will be

1.  (3-6e-3t)u(t)

2.  (3-3e-3t)u(t)  

3.  3 u(t)

4.  (3+3e-3t)u(t)

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4
Correct Answer :

3 u(t)


Explanation :
No Explanation available for this question

If the electrical field of 10V/cm applied across a crystal causes the minority carriers To move a distance of 1cm in 20sec, then the mobility is

1.  1000

2.  5000

3.  500000

4.  2000

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4
Correct Answer :

5000


Explanation :
No Explanation available for this question

Consider the voltage waveform shown in the figure The equation of V(t) is

1.  u(t-1)+u(t-2)+u(t-3)

2.  u(t-1)+2u(t-2)

3.  u(t-1)+u(t-2)+u(t-3)-3u(t-4)

4.  None of these

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4
Correct Answer :

u(t-1)+u(t-2)+u(t-3)-3u(t-4)


Explanation :
No Explanation available for this question

A current of waveform shown in figure passes through a pu inductance of 3mH. The instantaneous power in watts during 0 < t < 2m sec is

1.  25000t

2.  50000t

3.  75000t

4.  10, 000t

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4
Correct Answer :

75000t


Explanation :
No Explanation available for this question

Hall coefficient enables the determination of

1.  Mobility of carriers

2.  Fermi level and Forbidden gap

3.  Temperature coefficient & thermal conductivity

4.  Type of conductivity

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4
Correct Answer :

Type of conductivity


Explanation :
No Explanation available for this question

A 10V battery with an internal resistor of 1Ω is connected across a non-linear load whose V-I characteristic are 7i=V2+2V The current delivered by the battery is

1.  2.5A

2.  5A

3.  6A

4.  7A

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4
Correct Answer :

5A


Explanation :
No Explanation available for this question

If electron mobility and lifetime in a semiconductar room temperature are 0.36 m_305cm

1.  1.78mm

2.  3.55 mm

3.  3.12cm

4.  3.13 conduct

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4
Correct Answer :

1.78mm


Explanation :
No Explanation available for this question

For a given voltage, four heating coils will produce maximum heat when connected

1.  All in parallel

2.  All in series

3.  With two parallel pairs in series

4.  None of these

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4
Correct Answer :

All in parallel


Explanation :
No Explanation available for this question

The time constant of the circuit shown in figure below is

1.  RC

2.  2 RC

3.  3 RC

4.  5 RC

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4
Correct Answer :

3 RC


Explanation :
No Explanation available for this question
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