List of top Instrumentation Engineering Questions on Control Systems asked in TS PGECET

The coherence length of the He-Ne laser beam is 120 cm. Its coherence time in seconds is:

Collimated light beams from a He-Ne laser and a sodium vapor lamp are focused using a lens.
The size of the spot at the focal point due to the laser is relatively smaller because

A temperature control system is usually very sluggish. To improve its dynamics:

A first order system with a proportional controller exhibits an offset to step input. The offset can be reduced by:

An integral controller is used to:

The system \( G(s) = \frac{0.8}{s^2 + s - 2} \) is subjected to a step input. The system output \( y(t) \) as \( t \rightarrow \infty \) is:

If the transfer function of a system is \( G(s) = \frac{A}{s^2 + \omega^2} \), then the steady state gain of the system to a unit step input is:

Consider a unity feedback control system whose forward path transfer function is \( G(s) = \frac{K}{s^2} \). The steady state error for a step input is:

If the open loop transfer function of the negative feedback control system is \[ G(s)H(s) = \frac{k}{(s+1)^3}, \] then the gain $k$ for a closed loop pole at \[ \left( \frac{1}{2} + j\frac{\sqrt{3}}{2} \right) \] is:

A transfer function has two zeros at infinity. Then the relation between the numerator degree (N) and the denominator degree (M) of the transfer function is:

The transfer function of the system is the Laplace transform of its