What is the consequence of marginally stable systems?

A)
It will be a damped system
B)
The system will be an overdamped system
C)
Purely oscillatory system
D)
The system will turn out to be critically damped

Correct Answer : Option (C) :   Purely oscillatory system

Explanation : The system will be a purely oscillatory system with no damping involved.

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For a Gaussian process, auto-correlation sequence also implies that
A)
ergodic process
B)
statistical dependence
C)
statistical independence
D)
All of the above

Correct Answer :   statistical dependence

Consider the following statements

1. If ensemble and time averages of a random process are identical, the process is ergodic.
2. If ensemble and time average of a random process are not identical, the process is ergodic.
3. An ergodic process is stationary.
4. A stationary process is necessarily ergodic.

Which of the above statements are correct?
A)
1 only
B)
1 and 3 only
C)
1 and 4 only
D)
1, 3 and 4 only

Correct Answer :   1 and 3 only

In RLC circuits the state variables generally selected are
A)
voltages across capacitors
B)
currents through resistances and capacitances
C)
currents through inductances and voltages across capacitances
D)
currents through resistances and voltages across capacitors

Correct Answer :   currents through inductances and voltages across capacitances

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