83.

84.

85.

86.

87.

88.

89.

098/23

If P and E are the average power and energy of continuous or discrete time signal,
then energy signal is

مه -ط ہمہ > ع > 0 (8 0-ط ,ره > ع > 0 رم
‎ಎ0‏ ,مه > ط > 0 )0 م دع رمه > ط > 0 (0

For a continuous time system described by y(t) = x(t/2) is
A) Causal, stable and time varying

B
0
0

)
) Linear and time-invariant

) Linear and causal

) Linear and stable

Let x(t) = cos(t) and x(t) is continuous at t = 0, then x(t) 5(t — 7) 15

A) -1 B) 0 C) cos(z) 5(t) 2) -6 (1-5)

The fundamental period of a discrete signal x[n] = 5"
A) 1/4s B) 4s C) 8s D) 1/8s

The response of LTI continuous time system to the unit step input is given by

1
3 (1 - 6731), then the impulse response of the system is

1
^) उ (1 - ‏رم 3۷م"‎ م٢‎ C) 1- ‏اقم‎ D) Constant

The impulse response h(t) of a LTI continuous time system is described by
h(t) = e“tu(t) + eBtu(—t) where u(t) denotes the unit step function, « and B are real
constants. This system is stable if

A) Both a and B are positive

8) Both a and f are negative

C) ais positive and B is negative
)

D) a is negative and f is positive

Consider the signal x(t) = sin (3xt) + sin (6xt), the minimum sampling interval to satisfy
the Shannon’s sampling rule is

A) 1/6s 8) 1⁄3 5 C) 12s D) 36s

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