GATE 2020: Toppers Quiz 3 (App update required to attempt this test)

A 3-ø star connected synchronous generator is rated at 1 .5MVA, 11kV. The armature effective resistance and synchronous reactance on 0.015pu. and 0.31 p.u. respectively. Find out the pf at which the regulation becomes zero for a load of 1 .4375 MV

Consider the system shown below,
 
For the damping ratio ξ = 0.7, the value of ‘a’ is _____.

For the oscillator circuit shown in figure, the expression for the time period of oscillation can be given by (where =RC

Consider the two port network given below

Y parameter Y₁₁ in ‘s’ domain for the network is

A 250V M.I. voltmeter has coil resistance of 500Ω, coil inductance 0f 1.04 H and series resistance of 2kΩ. The meter reads correctively at 250V D.C. What will be the value of capacitance to be used for shunting the series resistance to make the meter read correctly at 50HZ? What is the reading of voltmeter(in Volts) on A.C. without capacitance?

At no load, a 3-phase, 50Hz, lossless power transmission line has sending end and receiving end voltages of 430kv and 450kv. Assume the velocity of travelling wave to be 300000 km/s, then the length of the line is.......

A chopper is used for on-off control of a dc separately excited motor. The chopper is fed from a dc source of 230 V and it has on time of 10 msec and off-tome of 15 msec. The motor constants are as following:

Armature resistance Voltage constant K_m = 0.5 V-s/rad

Assume motor current is continuous. For a speed of 1500 rpm, the average load current will be

Consider the circuit given below.

Find the maximum power that can be deliver to the load resistor R_L.