GATE EE Question Paper 2002.
GATE i.e. Graduate Aptitude Test in Engineering Electrical Engineering 2002 Exam Has been Conducted by IISc Bangalore IIT Bombay IIT Delhi IIT Guwahati IIT Kanpur IIT Kharagpur IIT Madras IIT Roorkee. This GATE EE 2002 examination is the procedure to get the admission in M.Tech
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GATE EE Question Paper 2002
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The graph of an electrical network has N nodes and B branches. The number of Links, L. with respect to the choice of a tree, is given by
(a) B—N+1 (b) B+N
(c) N—B+1 (d) N—2B—1
Two in-phase, 50 Hz sinusoidal waveforms of unit amplitude are fed into channel I and channel 2 respectively of an oscilloscope. Assuming that the voltage scale, time scale and other settings are exactly the same for both the channels, what would be observed if the oscilloscope is operated in X-Y mode?
(a) A circle of unit radius.
(b) An ellipse
(c) A parabola
(d) A straight line inclined at 450 with respect to the x-axis.
The rotor of a three phase, 5 kW, 400V, 50Hz, 51’P ring induction motor is wound for 6 poles while its stator is wound for 4 poles. The apprOx1Ttlute average no load steady state speed when this motor is connected to400V, 50 Hz supply ‘S
(a) 1500 rpm
(b) 500 rpm
(c) 0 rpm
(d) 1000 rpm
The flux per pole in a synchronous motor with the field circuit ON and the stator disconnected from the supply is found to he 25 mWb. When the sta(or is connected to the rated supply with the field excitation unchanged, the flUX per pole
iii the machine is found to be 20 mWb while the motor is running on no load. Assuming no load losses to be zero, the no load current down by the motor from the supply
(a) lags the supply voltage
(b) leads the supply voltage
(c) is in phase with (he supply voltage
d) is zero
A six pulse thyristor rectifier bridge is connected to a balanced 50 lIz three phase ac source. Assuming that the dc output current of the rectifier is constant, the lo%’est Frequency harmonic component in the ac source line current is
(a) 100 Hz
(b) 150 Hz
(c) 250 Hz
(d) 300 Hz