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Electronics and Communication Engineering - Signals and Systems

Exercise : Signals and Systems - Section 4
16.

Assertion (A): The number ∈ such that the probability that an error is between -∈ and + ∈ is 1 is called probable error of single obserevation.

Reason (R): The standard deviation is the arms value of the deviation from the arithmetic mean.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Which of the following is the correct Laplace transform of the signal shown in the given figure
Answer: Option
Explanation:

It is the sum of three functions, i.e., a unit of step function originating at t = 0, a ramp with slope originating at t = 0 and another ramp with slpoe and originating at t = T. Thus .

18.
If x(t) and its first derivative are Laplace transformable and Laplace of transform x(t) is X(s), then x(t) is
Answer: Option
Explanation:

It is initial value theorem.

19.
If a function has only cosine terms, it must satisfy the equation
f(t) = -f(t)
f(-t) = f(t)
f(-t) = -f(t)
none of the above
Answer: Option
Explanation:

cos (- θ) = cos θ.

20.
If v(t) is a time varying voltage, is
initial current
initial voltage
initial charge
initial flux leakages
Answer: Option
Explanation:

Since .

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