List of top Electrical Engineering Questions

A long two-wire line composed of solid ground conductors is 0.5 cm and the distance between their centres is 2 m. If this distance is doubled, then the inductance per unit length _______.
Fourier transform of \( a_1 f_1(t) + a_2 f_2(t) \) is ________.
Which of the following systems is time invariant?
The maximum reverse bias voltage that can be applied to a reverse biased PN junction diode without damaging the junction is called _______.
A single-phase full bridge inverter is connected to a load of 24 \( \Omega \). The DC input voltage is 48 V. What is the rms output voltage at fundamental frequency?
Variable frequency drives (VFDs) are used in ________.
The main advantage of IGBT over MOSFET is _______.
Which of the following is NOT a part of the typical speed-time curve for train movement?
In a three-phase full wave AC to DC converter, the ratio of output ripple frequency to the supply voltage frequency is _______.
A transformer has no-load voltage of 220 V and full-load voltage of 210 V. Find voltage regulation.
A DC chopper operates on 230 V DC and frequency of 400 Hz, feeds an R-L load. If the output voltage of chopper is 150 V, the ON time of the chopper is _______.
The initial value of \( x[n] \) is _______, if \[ X(z) = \frac{3z^2}{(z+3)(z-3)} \]
A 100 km long, three phase, 110 V, 50 Hz overhead transmission line has three conductors each diameter 1.5 cm. The conductors are spaced 2 m at the corners of equilateral triangle. The capacitance of the line is _______.
When the firing angle \( \alpha \) of a single phase, fully controlled rectifier feeding a constant DC current into a load is \( 30^\circ \), the displacement power factor of the rectifier is _______.
If \( R_1 \) is the region of convergence of \( x(n) \) and \( R_2 \) is the region of convergence of \( y(n) \), then the region of convergence of \( x(n) * y(n) \) is _______.
Turn-on time of an SCR can be reduced by using a _______.
Two binary signals ‘a’ and ‘b’ are to be compared. When two signals are equal, then output expression is _______.
A discrete-time signal \( x[n] = \sin(\pi^2 n) \), \( n \) being an integer, is ________.
Determine the fundamental period of the signal \( \cos\left(\frac{\pi}{4}t\right) + \sin\left(\frac{\pi}{3}t\right) \).
The discrete system \( y[n] = x[n-3] - 4x[n-7] \) is a _______.
If the accumulator of an Intel 8085A microprocessor contains 37 H and the previous operation has set the carry flag, the instruction ACI 56 H will result in ________.
Ohm’s law relates the current density \( J \) with field intensity \( E \) as _______.
If the fault current is 2000 A, the relay setting is 50% and the CT ratio is 400/5, then the plug setting multiplier will be ________.
The ratio error of a CT is due to ________.
NAND and NOR gates are called ________.