List of top Electrical Engineering Questions

The RMS output voltage at fundamental frequency of a single-phase, full-bridge inverter with input voltage of 48V DC, feeding a load of 2.4 \( \Omega \) is:
A single-phase inverter has a square wave output voltage. The percentage of the fifth harmonic component in relation to the fundamental component is:
In a single-phase semi-converter without a freewheeling diode, for discontinuous conduction and extinction angle \( \beta>\pi \), each SCR conducts for the period:
The state variable description of a system is: \[ \dot{X} = AX + BU, \quad A = \begin{bmatrix} 0 & 3 \\ 3 & 0 \end{bmatrix} \] The poles of the system are located at:
The transfer function of a first-order controller is given as: \[ G_c(s) = K \frac{(s + a)}{(s + b)} \] where \( K, a, b \) are positive real numbers. The condition for this controller to act as a phase lag compensator is:
Loop transfer function of a feedback system is: \[ G(s)H(s) = \frac{10}{s - 2} \] Assume the Nyquist contour in the clockwise direction. Then the Nyquist plot of \( G(s) \) encircles \(-1 + j0\):
A closed-loop system has the characteristic equation given by: \[ s^3 + k s^2 + (k+2) s + 3 = 0 \] For the system to be stable, the value of \( k \) is:
A system has two zeros and four poles. Then two asymptotes in the root loci plane move towards infinity along:
The steady-state error due to unit acceleration input for a type 2 system is:
The Impulse Response of an initially relaxed linear system is \( e^{-2t}u(t) \). To produce a response of \( te^{-2t}u(t) \), the input should be:
Negative phase sequence current in an alternator produces:
Magnetizing inrush current is rich in:
Four identical alternators each rated for 20 MVA, 11 kV having a sub-transient reactance of 16% are working in parallel. The short circuit level at the bus bars is:
Which of the following matrices reveals the topology of the power system network?

Corona loss increases with:

The nuclear plants are suitable for:

AC machines should have proper _______ in order to limit the operating temperature.

The flux set up by the armature current, which does not cross the air gap and takes a different path, is called:

To eliminate the 5th harmonic voltage from the phase voltage of an alternator, the coils should be short-pitched by an electrical angle of:

Power factor of a power transformer on no load will be about:

A transformer steps up the voltage by a factor of 100. The ratio of current in the primary to that in the secondary is:

Dynamic braking is very effective for:
Which of the following motors is expected to have maximum full-load efficiency?

200 V, 50 Hz inductive circuit takes a current of 10 A lagging the voltage by 30°. Calculate inductance of the circuit.

Energy stored in the capacitor is: