106. A signal V(n) is defined by
     

     V[n] =		1; n = 1
     		– 1; n = – 1
     		0; n = 0 and |n| > 1

     
     What is the value of the composite signal defined as V[n] + V[– n]?

1. 1. 0 for all integer values of n

   
   
   

   2. 2 for all integer values of n

   
   
   

   3. 1 for all integer values on n

   
   
   

   4. – 1 for all integer values of n

   
   
   

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1. View Hint View Answer Discuss in Forum

   Given
   

   V[n] =		1;	n = 1
   		-1;	n = – 1
   		0 ;	n=0 and |n| > 1

   
   
   On adding both the plots i.e., V[n] + V[– n] = 0
   Hence, alternative (A) is the correct choice.

   Correct Option: A

   Given
   

   V[n] =		1;	n = 1
   		-1;	n = – 1
   		0 ;	n=0 and |n| > 1

   
   
   On adding both the plots i.e., V[n] + V[– n] = 0
   Hence, alternative (A) is the correct choice.

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107. The I/O relation of a capacitor is described by
     

     V(t) =	1		t	i(t)dt
     	C		– ∞

     
     then its memory (Past) is—

1. 1. 0

   
   
   

   2. 2

   
   
   

   3. 3

   
   
   

   4. ∞

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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108. The discrete-time version of the ramp function is defined by
     

     r[n] =		n‚ n ≥ 0
     		0‚ n < 0

     
     This also equivalent to—

1. 1. r[n] = 1

   
   
   

   2. r[n] = n

   
   
   

   3. r[n] = nu[r(n)]

   
   
   

   4. r[n] = nu[n]

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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109. The continuous-time version of the unit impulse commonly denoted by δ(t) is define by the pair of relations
     

     δ(t) = 0 for t ≠ 0 and		∞	δ(t) is equal to—
     		– ∞

1. 1. 0

   
   
   

   2. ∞

   
   
   

   3. 1

   
   
   

   4. – 1

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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110. y(n) = x[n – 2] – 2x[n – 7] is a—

1. 1. Discrete time dynamic system

   
   
   

   2. Discrete time static system

   
   
   

   3. System of less memory

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   The system, y[n] = x[n – 2] – 2x[n – 7] is discrete time system and here the present output y[n] is dependent on previous inputs viz., x[n – 2] and x[n – 7] i.e., in the given system delay elements are present. Hence, the system is dynamic.

   Correct Option: A

   The system, y[n] = x[n – 2] – 2x[n – 7] is discrete time system and here the present output y[n] is dependent on previous inputs viz., x[n – 2] and x[n – 7] i.e., in the given system delay elements are present. Hence, the system is dynamic.

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