Find the phase shift provided by the lead compensator for a given transfer function G(s) = (1 + 6s)/ (1 + 2s)

15 degrees

30 degrees

45 degrees

60 degrees

Correct Answer : Option (B) : 30 degrees

Explanation :

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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 +90°

is -90°

depends on the damping factor

None of the above

Correct Answer : is -90°

The response to sinusoidal excitation can be found by

setting s = jω in the network function

setting s = -jω in the network function

taking inverse transform of network function

None of the above

Correct Answer : setting s = jω in the network function

The resolution of a wire wound potentiometer is about

0.1%

0.001%

Correct Answer : 0.1%