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Electronics and Communication Engineering - Automatic Control Systems

Exercise : Automatic Control Systems - Section 5
16.
The shape of torque-speed curve of a two phase servo- motor mostly depends on
ratio of rotor reactance to rotor resistance
ratio of stator reactance to rotor resistance
ratio of rotor reactance to rotor resistance and also the ratio of stator reactance to stator resistance
magnitude of stator voltages
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
In a lag network the input frequency is 100 fc where fc is critical frequency. The voltage gain is
0 dB
-20 dB
-40 dB
-60 dB
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.

Assertion (A): Temperature control of the passenger compartment of car uses both feed forward and feedback controls.

Reason (R): Feed forward control gives corrective action before the disturbance affects the output and feedback control applies corrective action after output changes.

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 correct but R is wrong
R is correct but A is wrong
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.

Assertion (A): Most of actual systems are non-linear.

Reason (R): Non linearity may be due to saturation, dead zone, square law etc.

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 correct but R is wrong
R is correct but A is wrong
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The correct sequence of events to improve system stability is
insert derivative action, use negative feedback, reduce gain
reduce gain, use negative feedback, insert derivative action
reduce gain, insert derivative feedback, use negative feed back
use negative feedback, reduce gain, insert derivative action
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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