Electrical Engg (EEE) - MCQ Practice Questions

In phase-lead compensation, the zero is placed:

For a second-order system with natural frequency ωn = 5 rad/s and ζ = 0.7, the peak time tp is approximately:

A negative feedback system's loop gain L(s) = G(s)H(s) has a pole-zero excess of 2. What can be concluded?

A feedback system's sensitivity function S(s) = 1/(1+L(s)) where L(s) is loop gain. For large |L(s)|, what happens to |S(s)|?

For a system to be controllable using state feedback u = -Kx, which condition must be satisfied?

For improving transient response with minimal steady-state error impact, a lead compensator should be designed to add phase lead at:

For the characteristic equation s⁴ + 8s³ + 24s² + 32s + 15 = 0, using Routh-Hurwitz criterion, the system is:

In a root locus plot, the asymptotes for a system with 5 poles and 2 zeros meet at a point called:

For a system with Gc(s)G(s)H(s) = 100/[s(s+5)], the phase at ω = 5 rad/s is approximately:

The sensitivity function S(s) in a feedback control system is defined as:

In a Type-2 system with step, ramp, and parabolic inputs, the steady-state error with parabolic input A·t²/2 and loop gain Kv = 5 is:

In a three-phase inverter, 180° conduction mode means:

Which of the following has the lowest on-state voltage drop among power semiconductor devices?

The snubber circuit in power electronics is used to:

In a soft-start thyristor converter, the firing angle is gradually increased to:

The turn-off time (toff) of a power transistor includes:

In a boost converter operating in continuous conduction mode (CCM), the average output voltage relationship is:

The dv/dt rating of a power semiconductor is important because it:

In a three-level diode-clamped inverter (Neutral Point Clamped), the advantage over two-level inverter is:

Which control strategy for a DC-DC converter provides the tightest output voltage regulation under varying input voltage and load conditions?