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Electronics and Communication Engineering - Signals and Systems

Exercise : Signals and Systems - Section 4
46.
Laplace transform of unit doublet is
1/s
s2
s
none
Answer: Option
Explanation:

Unit doublet is

.

47.
The integral of a unit step function is
a unit impulse function
a unit pulse function
a ramp function of slope 1
none of the above
Answer: Option
Explanation:

.

48.
Highest value of autocorrelation function 100 sin 50 pt is
50
zero
100
100/p
Answer: Option
Explanation:

Highest value of autocorrelation is at origin and that is called Energy.

49.
A unit impulse voltage is applied to an inductance at t = 0. The current at t = 0 will be
0
L amperes
∞
Answer: Option
Explanation:

.

50.
A voltage wave containing 10% third harmonic is applied to a scries R-L circuit. The percentage third harmonic content in the current wave will be
more than 10%
10% or less than 10%
less than 10%
10% or more or less
Answer: Option
Explanation:

.

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