Given f(t) and g(t) as shown below The Laplace transform of g(t) is

1.  (e3s - e5s)/s

2.  (e-5s - e-3s)/s

3.  (e-3s - e-5s)/s

4.  (e5s - e3s)/s

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4
Correct Answer :

(e-3s - e-5s)/s


Explanation :
No Explanation available for this question

A low-pass filter with cut-off frequency of 30 Hz is cascaded with a high-pass filter with a cut-off frequency of 20 Hz. The resultant system of filters will function as

1.  An all-pass filter

2.  An all-stop filter

3.  A band stop (band-reject) filter

4.  A band-pass filter.

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4
Correct Answer :

A band-pass filter.


Explanation :
No Explanation available for this question

Given two continuous time signals x(t)=e-t and y(t)=e-2t which exist for t>0, the convolution z(t)=x(t)*y(t) is

1.  e-t –e-2t

2.  e-3t

3.  e+t

4.  e-t + e-2t.

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4
Correct Answer :

e-t –e-2t


Explanation :
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A zero mean random signal is uniformly distributed between limits –a and +a and its mean square value is equal to its variance. Then the r.m.s value of the signal is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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The response h(t) of a linear time invariant system to an impulse δ(t), under initially relaxed condition is h(t)=e-t+e-2t. The response of this system for a unit step input u(t) is

1.  u(t)+e-t+e-2t

2.  (e-t+e-2t)u(t)

3.  (1.5-e-t-0.5e-2t)u(t)

4.  e-tδ(t)+e-2tu(t)

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4
Correct Answer :

(1.5-e-t-0.5e-2t)u(t)


Explanation :
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Given f(z) = . If C is a counter clock wise path in the z-plane the |z+1| = 1, the value of is

1.  -2

2.  -1

3.  1

4.  2

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4
Correct Answer :

1


Explanation :
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If then the region of convergence (ROC) of its z-transform in the Z-plane will be

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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Let y[n] denotes the convolution of h[n] and g[n] where and g[n] is a causal sequence. If y[0] =1 and y[1]=, then g[1] equals

1.  0

2.  

3.  1

4.  

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4
Correct Answer :

0


Explanation :
No Explanation available for this question

The Fourier transform of a signal h(t) is H(jω) = (2cosω)(sin 2ω)/ω.The value of h(0) is

1.  

2.  

3.  1

4.  2.

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4
Correct Answer :

1


Explanation :
No Explanation available for this question

A combinational circuit has inputs A, B and C and its karnaugh map is as shown .the output of the circuit is given by

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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