Electronics and Communication Engineering - Signals and Systems

1. 

eAt can be expanded as

A.
B.
C.
D.

Answer: Option B

Explanation:

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2. 

If , f(t) =

A.
B.
C.
D.

Answer: Option C

Explanation:

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3. 

For a wave v = V 1m sin (ωt + θ1 ) - V3m sin (3ωt + θ3), the rms value is (0.5 V21m + 0.5 V23m)0.5

A. True
B. False

Answer: Option A

Explanation:

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4. 

The function in the given figure can be written as

A. u(t - 1) sin p ( t - 1) - u(t - 3) sin p (t - 3) + u(t - 4) sin p (t - 4) - u(t - 6) sin p (t - 6)
B. u(t - 1) sin p ( t - 1) - u(t - 3) sin p (t - 3) + u(t - 4) sin p (t - 4)
C. u(t - 1) sin p ( t - 1) + u(t - 4) sin p (t - 4)
D. u(t - 1) sin 2p ( t - 1) + u(t - 4) sin 2p (t - 4)

Answer: Option A

Explanation:

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5. 

F.T. of continuous non-periodic signal is

A. aperiodic
B. periodic
C. a and b
D. none

Answer: Option A

Explanation:

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