One Stop GATE Forum: 2002- year EE GATE Paper

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 1.  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 œ N + 1      (b)  B + N   
 (c)  N œ B + 1      (d)  N œ 2B -1 

2.  Two in-phase, 50 Hz sinusoidal waveform of unit amplitude are fed into channel 1 
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 45° with respect to the x-axis 

3.  If  a  400V,  50  Hz,  star  connected,  3  phase  squirrel  cage  induction  motor  is 
operated from a 400 V, 75 Hz supply, the torque that the motor can now provide 
while drawing rated current from the supply? 
  (a)  reduces      (b)  increases 
 (c)  remains the same       
 (d)  increase or reduces depending upon the rotor resistance 

4.  A 1 kVA,  230V/100V, single phase, 50 Hz transformer  having negligible  winding  BDC Torque resistance and leakage inductance is operating under saturation, while 250 V, 50 
Hz sinusoidal supply is connected to  the high voltage winding. A resistive load is connected  to  the  low  voltage  winding  which  draws  rated  current.  Which  one  of the following quantities will not be sinusoidal? 
  (a)  Voltage induced across the low voltage winding       
 (b)  Core flux 
 (c)  Load current       
 (d)  Current drawn from the source 

5.  The  logic  circuit  used  to  generate  the  active  low  chip  select  (CS)  by  an  8085 
microprocessor  to  address  a  peripheral  is shown  in  Fig.1.14.  The  peripheral will 
respond to addresses in the range.   
  (a)  E000-EFFF   
 (b)  000E-FFFE   
 (c)  1000-FFFF   
 (d)  0001-FFF1 

6.  Consider a long, two-wire line composed of solid round conductors. The radius of 
A15  
A14 
A13  
 CS
A12 
both conductors  is 0.25 cm and  the distance between their centers is 1m. If  this 
distance is doubled, then the inductance per unit length   
  (a)  doubles      (b)  halves   
 (c)  increases but does not double  (d)  decreases but does not halve 

7.  Consider a power system with three identical generators. The transmission losses 
are  negligible.  One  generator  (G1)  has  a  speed  governor  which  maintains  its 
speed  constant at the  rated value, while  the other generators (G2 and G3) have 
governors  with  a  droop  of  5%.  If  the  load  of  the  system  is  increased,  then  in 
steady state. 
  (a)  generation  of  G2  and  G3  is  increased  equally  while  generation  of  G1  is 
unchanged.   
  (b)  generation  of  G1  alone  is  increased  while  generation  of  G2  and  G3  is 
unchanged.   
  (c)  generation of G1, G2 and G3 is increased equally.   
 (d)  generation of G1, G2 and G3 is increased in the ratio 0.5:0.25:0.25. 

8.  A  long  wire  composed  of  a  smooth  round  conductor  runs  above  and  parallel  to 
the  ground  (assumed  to  be  a  large  conducting  plane).  A  high  voltage  exists 
between the conductor and the ground. The maximum electric stress occurs at 
  (a)  the upper surface of the conductor   
 (b)  the lower surface of the conductor   
 (c)  the ground surface   
 (d)  midway between the conductor and ground 

Author	Message
Smitha Newbie Joined: 08Feb2007 Online Status: Offline Posts: 14	Topic: 2002- year EE GATE Paper Posted: 14Feb2007 at 11:01am
	1. 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 œ N + 1 (b) B + N (c) N œ B + 1 (d) N œ 2B -1 2. Two in-phase, 50 Hz sinusoidal waveform of unit amplitude are fed into channel 1 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 45° with respect to the x-axis 3. If a 400V, 50 Hz, star connected, 3 phase squirrel cage induction motor is operated from a 400 V, 75 Hz supply, the torque that the motor can now provide while drawing rated current from the supply? (a) reduces (b) increases (c) remains the same (d) increase or reduces depending upon the rotor resistance 4. A 1 kVA, 230V/100V, single phase, 50 Hz transformer having negligible winding BDC Torque resistance and leakage inductance is operating under saturation, while 250 V, 50 Hz sinusoidal supply is connected to the high voltage winding. A resistive load is connected to the low voltage winding which draws rated current. Which one of the following quantities will not be sinusoidal? (a) Voltage induced across the low voltage winding (b) Core flux (c) Load current (d) Current drawn from the source 5. The logic circuit used to generate the active low chip select (CS) by an 8085 microprocessor to address a peripheral is shown in Fig.1.14. The peripheral will respond to addresses in the range. (a) E000-EFFF (b) 000E-FFFE (c) 1000-FFFF (d) 0001-FFF1 6. Consider a long, two-wire line composed of solid round conductors. The radius of A15 A14 A13 CS A12 both conductors is 0.25 cm and the distance between their centers is 1m. If this distance is doubled, then the inductance per unit length (a) doubles (b) halves (c) increases but does not double (d) decreases but does not halve 7. Consider a power system with three identical generators. The transmission losses are negligible. One generator (G1) has a speed governor which maintains its speed constant at the rated value, while the other generators (G2 and G3) have governors with a droop of 5%. If the load of the system is increased, then in steady state. (a) generation of G2 and G3 is increased equally while generation of G1 is unchanged. (b) generation of G1 alone is increased while generation of G2 and G3 is unchanged. (c) generation of G1, G2 and G3 is increased equally. (d) generation of G1, G2 and G3 is increased in the ratio 0.5:0.25:0.25. 8. A long wire composed of a smooth round conductor runs above and parallel to the ground (assumed to be a large conducting plane). A high voltage exists between the conductor and the ground. The maximum electric stress occurs at (a) the upper surface of the conductor (b) the lower surface of the conductor (c) the ground surface (d) midway between the conductor and ground Post Resume: Click here to Upload your Resume & Apply for Jobs

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