The voltage across an impendance in a network is V(s)=Z(s)I(s), where V(s),Z(s) are the Laplace transforms of the corresponding time function v(t),z(t) and i(t) The voltage v(t) is

1.  v(t)=z(t).v(t)

2.  

3.  

4.  v(t)=z(t)+i(t).

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4
Correct Answer :

Explanation :
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convolution of x(t+5) with impulse function δ(t-7) is equal to

1.  x(t-12)

2.  x(t+12)

3.  x(t-2)

4.  x(t+2).

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4
Correct Answer :

x(t-2)


Explanation :
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The rms value of the periodic wave form e(t), shown in the figure is

1.  

2.  

3.  

4.  

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4
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Explanation :
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Fourier series for the waveform, f(t) shown in the given figure is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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A linear time variant system has an impulse response e2t, t>0. If the initial conditions are zero and the input is e3t, the output for t>0 is

1.  e3t-e2t

2.  e5t

3.  e3t+e2t

4.  None of these.

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4
Correct Answer :

e3t-e2t


Explanation :
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If u(t) is the step function, then which of the waveforms corresponds to the convolution of u(t)-u(t-1) with u(t)-u(t-2)

1.  

2.  

3.  

4.  

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4
Correct Answer :


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A periodic rectangular signal,  x (t) has the wave form shown in figure below . frequency of the fifth harmonic of its spectrum is

1.  40 Hz

2.  200 Hz 

3.  250 Hz

4.  1250 Hz.

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4
Correct Answer :

1250 Hz.


Explanation :
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The average value of the voltage waveform shown below is

1.  0.632

2.  0.368

3.  2.71k

4.  None of these.

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4
Correct Answer :

0.632


Explanation :
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Laplace transform of sin 2 t is

1.  

2.   

3.  

4.  

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4
Correct Answer :


Explanation :
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The Fourier series coefficient for given periodic signal x(t) is

1.  1

2.  

3.  

4.  2

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4
Correct Answer :

2


Explanation :
No Explanation available for this question
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