In a metal, the average drift velocity of electron equals

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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Mobility of an electron in a metal is

1.  The flow of electron per unit electron

2.  Average drift velocity per unit current

3.  Reciprocal of resistivity

4.  Reciprocal of conductivity per unit charge

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4
Correct Answer :

Average drift velocity per unit current


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When a hole diffuses from the p region to the n region, it

1.  Becomes a majority carriers in the n- region

2.  Becomes a minority carriers in the n- region

3.  Lowers the potential Barrier

4.  Raises the potential barrier

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4
Correct Answer :

Becomes a minority carriers in the n- region


Explanation :
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The transfer function of a multi-input multi-output system with the state-space representation of X = AX + BU        Y = CX + DU Where X represent at state Y the output and U the input vector, will be given by

1.   C(sI – A)-1

2.   C(sI – A)-1 + D

3.   (sI – A)-B + D

4.  C(sI – A)-1B

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4
Correct Answer :

C(sI – A)-1B


Explanation :
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The unit impulse response of a unit feedback control system is given by C(t) = -e-t+2e-t(t≥,0) The open-loop transfer function is equal to

1.  

2.  

3.  

4.  

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4
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Explanation :
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Consider the unit-step response of a unit-feedback control system whose open-loop transfer function is G(s) =1/s(s+1)   The maximum overshoot equal to

1.  0.143

2.  0.153

3.  0.163

4.   0.194

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4
Correct Answer :

0.163


Explanation :
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For a feedback control system of type 2, the steady state error for a ramp input is

1.   infinite

2.  constant

3.  0.163

4.  0.194

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4
Correct Answer :

0.163


Explanation :
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The period of the output waveform for the circuit of figure shown, when triggered by a negative pulse is

1.  0.75 ms

2.  0.825 ms

3.  0.525 ms

4.  1.5 ms

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4
Correct Answer :

0.825 ms


Explanation :
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The close-loop transfer function of a control system is given For the input r(t) = sint the steady state value of c(t) is equal to

1.  

2.  1

3.  

4.  

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4
Correct Answer :


Explanation :
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The impulse response of initially relaxed linear system is e-2t U(t). To produce a response of te-2t U(t), the input must be equal to

1.   2e-t U(t)

2.  1/2 e-2t U(t)

3.  e-2t U(t)

4.  e-t U(t)

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4
Correct Answer :

e-2t U(t)


Explanation :
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