In a second order system, the time constant t of exponential envelopes depends

Electronics and Communication Engineering (ECE) : Automatic Control Systems - Quiz(MCQ)

only on damping factor

only on natural frequency

both on damping factor and natural frequency

neither on damping factor nor on natural frequency

Correct Answer : Option (C) : both on damping factor and natural frequency

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For a quadratic factor in denominator of transfer function the phase angle at corner frequency (in Bode phase angle plot)

is +90Â°

is -90Â°

depends on the damping factor

None of the above

Correct Answer : is -90Â°

The response to sinusoidal excitation can be found by

setting s = jÏ‰ in the network function

setting s = -jÏ‰ in the network function

taking inverse transform of network function

None of the above

Correct Answer : setting s = jÏ‰ in the network function

The resolution of a wire wound potentiometer is about

0.1%

0.001%

Correct Answer : 0.1%