Electronics and Communication Engineering - Automatic Control Systems

In the given figure the input frequency is such that R << Xc, then
v0 lags vi by 90°
v0 leads vi by 90°
v0 and vi are in phase
either (b) or (c)
Answer: Option

Voltage across capacitor lags by 90°.

In the given figure, of potentiometer V0 = Vi (R0/Ri) only when
RL = 0
RL = ∞
RL is neither low nor high
RL is low but not zero
Answer: Option

If RL is not infinite, the voltage ratio of potentiometer depends on the value of RL. This is called loading effect.

A unity feedback system has open loop transfer function The closed loop transfer function is
Answer: Option


Bellows converts
pressure difference into displacement
pressure difference into voltage
displacement into pressure difference
either (a) or (c)
Answer: Option

To measure pressure, it is convenient to convert pressure into displacement and then use a displacement transducer.


Assertion (A): The steady state response, of a stable, linear, time invariant system, to sinusoidal input depends on initial conditions.

Reason (R): Frequency response, in steady state, is obtained by replacing s in the transfer function by jω

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

Steady state response does not depend on initial conditions.