Electrical Engi...

A generator is delivering 1.0 pu power shown in the figure. A three phase fault occurs at point F. The critical clearing angle for clearing the fault with simultaneous opening of breaker 1 and 2 is

A rectifier type PMMC voltmeter has a sensitivity of 20 kΩ/V. A reading of 4.5 V is obtained when measuring a voltage source with an internal resistance on it’s 5 V scale. When the scale is changed to 10 V full scale, a reading of 6 V is obtained. The value of the voltage and its internal resistance R are

The transfer function for the given signal flow graph is

The open-loop transfer function of a unity feedback system is given by

In G(s) plane, the Nyquist plot of G(s) passes through the negative real axis at the point:

A 3-phase, 11 kV transmission line delivers a load of 2395 kVA at 0.8 power factor lag over a distance of 25 km. The transmission line has an impedance per phase of (3.25 + j 7.55) ohms. The sending end power factor is

A line commutated inverter transfer energy into 450 V, 50 Hz, 3 phase supply from a battery of 600 V. The battery is linked to converter through a large choke filter having a resistor ‘R’. It is desired to transfer some power into supply. Consider the firing angle ‘α’ 120° and dc load current is 7 A. Calculate the resistor ‘R’ in ohms ______.

An energy meter is designed to have 80 revolutions of the disc for per unit of energy consumption. The load is carrying 30 A at 230 V and 0.6 power factor. Find the percentage error if the meter makes 340 revolutions.

Voltage Regulator circuit is shown below. Rating of Zener diode is given. The range of values of V_i that will maintain Zener diode is the ON condition is:

Consider the logic diagram below:

Suppose the circuit takes BCD only inputs i.e. 0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, 1000, 1001 and generate a logic HIGH output (F = 1) only when any two inputs are logic HIGH, (consider the invalid combinations for BCD input to be don’t care condition).

The correct SOP expression for output F is