Electrical Engineering (EE) 1999 GATE Paper without solution Electrical Engineering (EE) Notes | EduRev

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Electrical Engineering (EE) : Electrical Engineering (EE) 1999 GATE Paper without solution Electrical Engineering (EE) Notes | EduRev

 Page 1


GATE EE - 1999
SECTION – A 
1. This question consists of 25 (TWENTTY FIVE) sub-questions. Each sub-question
carries ONE mark. The answers to these sub-questions MUST be written only in
the appropriate boxes corresponding to the questions in the first page of the
answer book.
1.1 When the plate area of a parallel plate capacitor is increased keeping the 
capacitor voltage constant, the force between the plates 
(a) increase (b) decreases (c) remains constant 
(d) may increase or decrease depending on the metal making up the plates 
1.2 Two parallel wires separated by a distance d are carrying a current I in the same 
direction. The magnetic field along a line running parallel to these wires and 
midway between them
(a) depends upon I (b) is zero 
(c) depends upon d 
(d) depends upon the permeability of medium between the wires 
1.3 An electromagnetic field is radiated from 
(a) a stationary point charge (b) a capacitor with a DC voltage 
(c) a conductor carrying a DC current (d) an oscillating dipole 
1.4 The mobility of an electron in a conductor is expressed in terms of 
(a) 
2
/ cm V s - (b) / cm V s - (c) 
2
/ cm V (d) 
2
/ cm s
1.5 An enhancement type n-channel MOSFET is represented by the symbol 
(a) (b) 
(c) (d) 
1.6 As the temperature is increased, the voltage across a diode carrying a diode 
carrying a constant current 
(a) increases   (b) decreases 
(c) remains constant 
(d) may increase or decrease depending upon the doping levels in the junction 
Page 2


GATE EE - 1999
SECTION – A 
1. This question consists of 25 (TWENTTY FIVE) sub-questions. Each sub-question
carries ONE mark. The answers to these sub-questions MUST be written only in
the appropriate boxes corresponding to the questions in the first page of the
answer book.
1.1 When the plate area of a parallel plate capacitor is increased keeping the 
capacitor voltage constant, the force between the plates 
(a) increase (b) decreases (c) remains constant 
(d) may increase or decrease depending on the metal making up the plates 
1.2 Two parallel wires separated by a distance d are carrying a current I in the same 
direction. The magnetic field along a line running parallel to these wires and 
midway between them
(a) depends upon I (b) is zero 
(c) depends upon d 
(d) depends upon the permeability of medium between the wires 
1.3 An electromagnetic field is radiated from 
(a) a stationary point charge (b) a capacitor with a DC voltage 
(c) a conductor carrying a DC current (d) an oscillating dipole 
1.4 The mobility of an electron in a conductor is expressed in terms of 
(a) 
2
/ cm V s - (b) / cm V s - (c) 
2
/ cm V (d) 
2
/ cm s
1.5 An enhancement type n-channel MOSFET is represented by the symbol 
(a) (b) 
(c) (d) 
1.6 As the temperature is increased, the voltage across a diode carrying a diode 
carrying a constant current 
(a) increases   (b) decreases 
(c) remains constant 
(d) may increase or decrease depending upon the doping levels in the junction 
GATE EE - 1999
1.7 A single channel digital storage oscilloscope uses a 10 bit, 
7
10 samples per 
second Analog-to-Digital Converter. For a 100 KHz sine wave input, the number 
of samples taken per cycle of the input will be 
(a) 
7
10 (b) 
4
10 (c) 
3
10 (d) 
2
10
1.8 Higher synchronous reactance is preferred in the present day alternators, 
because one can have 
(a) reduced sub-transient currents (b) reduced harmonic currents 
(c) reduced transient currents 
(d) higher voltage regulation with load 
1.9 A series R-L-C circuit when excited by a 10V sinusoidal voltage source of variable 
frequency, exhibits resonance at 100 Hz and has a 3 dB bandwidth of 5 Hz. The 
voltage across the inductor L at resonance is: 
(a) 10 V (b) 10 2V (c) 
10
2V
(d) 200V 
1.10 The RMS value of a half-wave rectified symmetrical square wave current of 2A is: 
(a) 2A (b) 1A (c) 
1
2A
(d) 3A
1.11 Electodynamic type wattmeters have large errors while measuring power in ac 
circuits at low power factor conditions, since the voltage across and the current 
through the 
(a) current coil are not in phase (b) current coil are not in quadrature 
(c) pressures coil are not in phase 
(d) pressure coil are not in quadrature 
1.12 The current in the circuit shown in Fig.1.12 is: 
(a) 5A (b) 10A 
(c) 15A (d) 25A 
1.13 For the circuit shown in Fig.1.13, the capacitance measured between terminals B 
and Y will be 
(a) 
2
s
c
C
C
? ?
+
? ?
? ?
(b) 
2
c
s
C
C
? ?
+
? ?
? ?
(c) 
( ) 3
2
s c
C C +
(d) 3 2
c s
C C +
~ 
20O 
200 
V
200V 
100V 
50Hz 
i 
C c C c 
C s C s 
C c 
R 
B
Y 
Page 3


GATE EE - 1999
SECTION – A 
1. This question consists of 25 (TWENTTY FIVE) sub-questions. Each sub-question
carries ONE mark. The answers to these sub-questions MUST be written only in
the appropriate boxes corresponding to the questions in the first page of the
answer book.
1.1 When the plate area of a parallel plate capacitor is increased keeping the 
capacitor voltage constant, the force between the plates 
(a) increase (b) decreases (c) remains constant 
(d) may increase or decrease depending on the metal making up the plates 
1.2 Two parallel wires separated by a distance d are carrying a current I in the same 
direction. The magnetic field along a line running parallel to these wires and 
midway between them
(a) depends upon I (b) is zero 
(c) depends upon d 
(d) depends upon the permeability of medium between the wires 
1.3 An electromagnetic field is radiated from 
(a) a stationary point charge (b) a capacitor with a DC voltage 
(c) a conductor carrying a DC current (d) an oscillating dipole 
1.4 The mobility of an electron in a conductor is expressed in terms of 
(a) 
2
/ cm V s - (b) / cm V s - (c) 
2
/ cm V (d) 
2
/ cm s
1.5 An enhancement type n-channel MOSFET is represented by the symbol 
(a) (b) 
(c) (d) 
1.6 As the temperature is increased, the voltage across a diode carrying a diode 
carrying a constant current 
(a) increases   (b) decreases 
(c) remains constant 
(d) may increase or decrease depending upon the doping levels in the junction 
GATE EE - 1999
1.7 A single channel digital storage oscilloscope uses a 10 bit, 
7
10 samples per 
second Analog-to-Digital Converter. For a 100 KHz sine wave input, the number 
of samples taken per cycle of the input will be 
(a) 
7
10 (b) 
4
10 (c) 
3
10 (d) 
2
10
1.8 Higher synchronous reactance is preferred in the present day alternators, 
because one can have 
(a) reduced sub-transient currents (b) reduced harmonic currents 
(c) reduced transient currents 
(d) higher voltage regulation with load 
1.9 A series R-L-C circuit when excited by a 10V sinusoidal voltage source of variable 
frequency, exhibits resonance at 100 Hz and has a 3 dB bandwidth of 5 Hz. The 
voltage across the inductor L at resonance is: 
(a) 10 V (b) 10 2V (c) 
10
2V
(d) 200V 
1.10 The RMS value of a half-wave rectified symmetrical square wave current of 2A is: 
(a) 2A (b) 1A (c) 
1
2A
(d) 3A
1.11 Electodynamic type wattmeters have large errors while measuring power in ac 
circuits at low power factor conditions, since the voltage across and the current 
through the 
(a) current coil are not in phase (b) current coil are not in quadrature 
(c) pressures coil are not in phase 
(d) pressure coil are not in quadrature 
1.12 The current in the circuit shown in Fig.1.12 is: 
(a) 5A (b) 10A 
(c) 15A (d) 25A 
1.13 For the circuit shown in Fig.1.13, the capacitance measured between terminals B 
and Y will be 
(a) 
2
s
c
C
C
? ?
+
? ?
? ?
(b) 
2
c
s
C
C
? ?
+
? ?
? ?
(c) 
( ) 3
2
s c
C C +
(d) 3 2
c s
C C +
~ 
20O 
200 
V
200V 
100V 
50Hz 
i 
C c C c 
C s C s 
C c 
R 
B
Y 
GATE EE - 1999
1.14 An overhead line having a surge impedance of 400O is connected in series with 
an underground cable having a surge impedance of 100O. If a surge of 50 kV 
travels from the line end towards the line-cable junctions, the value of the 
transmitted voltage wave at the junction is: 
(a) 30 kV (b) 20 kV (c) 80 kV (d) -30 kV 
1.15 The load carrying capability of a long AC transmission line is: 
(a) always limited by the conductor size 
(b) limited by stability considerations 
(c) reduced at a low ambient temperatures  
(d) decreased by the use of bundled conductors of single conductors 
1.16 Corona losses are minimized when 
(a) conductor size is reduced (b) smooth conductor is reduced 
(c) sharp points are provided in the line hardware 
(d) current density in conductors is reduced 
1.17 In a DC transmission line 
(a) it is necessary for the sending end and receiving end to be operated in 
synchronism. 
(b) the effects of inductive and capacitive reactances are greater than in an AC 
transmission line of the same rating. 
(c) there are not effects due to inductive and capacitive reactances 
(d) power transfer capability is limited by stability considerations.  
1.18 Steady state stability of a power system is the ability of the power system to 
(a) maintain voltage at the rated voltage level 
(b) maintain frequency exactly at 50 Hz 
(c) maintain a spinning reserve margin at all times 
(d) maintain synchronism between machines and on external tie lines 
1.19. Three sections of a feeder are provided with circuit breakers CB1, CB2, CB3, CB4, 
CB5 and CB6. For a fault F as indicated in Fig.1.19. 
(a) CB5 must be set to trip after CB1 trips  
(b) CB5 must be set to trip after CB3 and CB4 trips 
(c) CB5 must be set to trip after CB2 trip  
(d) CB5 must be set to trip before CB1, CB2, CB3 and CB4 trips 
CB1 CB2 CB3 
CB4 CB5 CB6 F 
Page 4


GATE EE - 1999
SECTION – A 
1. This question consists of 25 (TWENTTY FIVE) sub-questions. Each sub-question
carries ONE mark. The answers to these sub-questions MUST be written only in
the appropriate boxes corresponding to the questions in the first page of the
answer book.
1.1 When the plate area of a parallel plate capacitor is increased keeping the 
capacitor voltage constant, the force between the plates 
(a) increase (b) decreases (c) remains constant 
(d) may increase or decrease depending on the metal making up the plates 
1.2 Two parallel wires separated by a distance d are carrying a current I in the same 
direction. The magnetic field along a line running parallel to these wires and 
midway between them
(a) depends upon I (b) is zero 
(c) depends upon d 
(d) depends upon the permeability of medium between the wires 
1.3 An electromagnetic field is radiated from 
(a) a stationary point charge (b) a capacitor with a DC voltage 
(c) a conductor carrying a DC current (d) an oscillating dipole 
1.4 The mobility of an electron in a conductor is expressed in terms of 
(a) 
2
/ cm V s - (b) / cm V s - (c) 
2
/ cm V (d) 
2
/ cm s
1.5 An enhancement type n-channel MOSFET is represented by the symbol 
(a) (b) 
(c) (d) 
1.6 As the temperature is increased, the voltage across a diode carrying a diode 
carrying a constant current 
(a) increases   (b) decreases 
(c) remains constant 
(d) may increase or decrease depending upon the doping levels in the junction 
GATE EE - 1999
1.7 A single channel digital storage oscilloscope uses a 10 bit, 
7
10 samples per 
second Analog-to-Digital Converter. For a 100 KHz sine wave input, the number 
of samples taken per cycle of the input will be 
(a) 
7
10 (b) 
4
10 (c) 
3
10 (d) 
2
10
1.8 Higher synchronous reactance is preferred in the present day alternators, 
because one can have 
(a) reduced sub-transient currents (b) reduced harmonic currents 
(c) reduced transient currents 
(d) higher voltage regulation with load 
1.9 A series R-L-C circuit when excited by a 10V sinusoidal voltage source of variable 
frequency, exhibits resonance at 100 Hz and has a 3 dB bandwidth of 5 Hz. The 
voltage across the inductor L at resonance is: 
(a) 10 V (b) 10 2V (c) 
10
2V
(d) 200V 
1.10 The RMS value of a half-wave rectified symmetrical square wave current of 2A is: 
(a) 2A (b) 1A (c) 
1
2A
(d) 3A
1.11 Electodynamic type wattmeters have large errors while measuring power in ac 
circuits at low power factor conditions, since the voltage across and the current 
through the 
(a) current coil are not in phase (b) current coil are not in quadrature 
(c) pressures coil are not in phase 
(d) pressure coil are not in quadrature 
1.12 The current in the circuit shown in Fig.1.12 is: 
(a) 5A (b) 10A 
(c) 15A (d) 25A 
1.13 For the circuit shown in Fig.1.13, the capacitance measured between terminals B 
and Y will be 
(a) 
2
s
c
C
C
? ?
+
? ?
? ?
(b) 
2
c
s
C
C
? ?
+
? ?
? ?
(c) 
( ) 3
2
s c
C C +
(d) 3 2
c s
C C +
~ 
20O 
200 
V
200V 
100V 
50Hz 
i 
C c C c 
C s C s 
C c 
R 
B
Y 
GATE EE - 1999
1.14 An overhead line having a surge impedance of 400O is connected in series with 
an underground cable having a surge impedance of 100O. If a surge of 50 kV 
travels from the line end towards the line-cable junctions, the value of the 
transmitted voltage wave at the junction is: 
(a) 30 kV (b) 20 kV (c) 80 kV (d) -30 kV 
1.15 The load carrying capability of a long AC transmission line is: 
(a) always limited by the conductor size 
(b) limited by stability considerations 
(c) reduced at a low ambient temperatures  
(d) decreased by the use of bundled conductors of single conductors 
1.16 Corona losses are minimized when 
(a) conductor size is reduced (b) smooth conductor is reduced 
(c) sharp points are provided in the line hardware 
(d) current density in conductors is reduced 
1.17 In a DC transmission line 
(a) it is necessary for the sending end and receiving end to be operated in 
synchronism. 
(b) the effects of inductive and capacitive reactances are greater than in an AC 
transmission line of the same rating. 
(c) there are not effects due to inductive and capacitive reactances 
(d) power transfer capability is limited by stability considerations.  
1.18 Steady state stability of a power system is the ability of the power system to 
(a) maintain voltage at the rated voltage level 
(b) maintain frequency exactly at 50 Hz 
(c) maintain a spinning reserve margin at all times 
(d) maintain synchronism between machines and on external tie lines 
1.19. Three sections of a feeder are provided with circuit breakers CB1, CB2, CB3, CB4, 
CB5 and CB6. For a fault F as indicated in Fig.1.19. 
(a) CB5 must be set to trip after CB1 trips  
(b) CB5 must be set to trip after CB3 and CB4 trips 
(c) CB5 must be set to trip after CB2 trip  
(d) CB5 must be set to trip before CB1, CB2, CB3 and CB4 trips 
CB1 CB2 CB3 
CB4 CB5 CB6 F 
GATE EE - 1999
1.20. A 4-pole lap-wound DC generator has a developed power of P watts and voltage 
of E volts. Two adjacent brushes of he machine are removed as they are worn 
out. If the machine operates with the remaining brushes, the developed voltage 
and power that can be obtained from the machine are  
(a) E, P (b) ,
2 2
E P
(c) E, 
4
P
(d) E, 
2
P
1.21. Starting torque can be obtained in the case of a single phase induction motor 
with identical main and auxiliary windings by connecting 
(a) a capacitor across the mains 
(b) a capacitor in series with the machine 
(c) a capacitor in series with the auxiliary winding 
(d) the main and the auxiliary windings in series 
1.22. The windings of a QkVA, 
1
2
V
V
volt, three-phase, Delta connected, core type 
transformer are reconnected to work as a single phase transformer. The 
maximum voltage and the power ratings of the new configuration are,  
(a) 
1
2
3
,3
3
V
Q
V
(b) 
1
2
,
3
V Q
V
(c) 
1
2
3
,2
3
V
Q
V
(d) 
1
2
2 2
,
2 3
V Q
V
1.23. Resonant converters are basically used to 
(a) generate large peaky voltage (b) reduce the switching losses 
(c) eliminate harmonics  
(d) convert a square wave into a sine wave 
1.24. A PWM switching scheme is used with a three phase inverter to 
(a) reduce the total harmonic distortion with modest filtering 
(b) minimize the load on the DC side 
(c) increase the life of the batteries 
(d) reduce low order harmonics and increase high order harmonics 
1.25 The following starting method for an induction motor is inferior view of the poor 
starting torque per ampere of the line current drawn: 
(a) Direct line starting 
(b) Auto transformer method of starting 
(c) Series inductor method of starting 
(d) Star-Delta method of starting 
Page 5


GATE EE - 1999
SECTION – A 
1. This question consists of 25 (TWENTTY FIVE) sub-questions. Each sub-question
carries ONE mark. The answers to these sub-questions MUST be written only in
the appropriate boxes corresponding to the questions in the first page of the
answer book.
1.1 When the plate area of a parallel plate capacitor is increased keeping the 
capacitor voltage constant, the force between the plates 
(a) increase (b) decreases (c) remains constant 
(d) may increase or decrease depending on the metal making up the plates 
1.2 Two parallel wires separated by a distance d are carrying a current I in the same 
direction. The magnetic field along a line running parallel to these wires and 
midway between them
(a) depends upon I (b) is zero 
(c) depends upon d 
(d) depends upon the permeability of medium between the wires 
1.3 An electromagnetic field is radiated from 
(a) a stationary point charge (b) a capacitor with a DC voltage 
(c) a conductor carrying a DC current (d) an oscillating dipole 
1.4 The mobility of an electron in a conductor is expressed in terms of 
(a) 
2
/ cm V s - (b) / cm V s - (c) 
2
/ cm V (d) 
2
/ cm s
1.5 An enhancement type n-channel MOSFET is represented by the symbol 
(a) (b) 
(c) (d) 
1.6 As the temperature is increased, the voltage across a diode carrying a diode 
carrying a constant current 
(a) increases   (b) decreases 
(c) remains constant 
(d) may increase or decrease depending upon the doping levels in the junction 
GATE EE - 1999
1.7 A single channel digital storage oscilloscope uses a 10 bit, 
7
10 samples per 
second Analog-to-Digital Converter. For a 100 KHz sine wave input, the number 
of samples taken per cycle of the input will be 
(a) 
7
10 (b) 
4
10 (c) 
3
10 (d) 
2
10
1.8 Higher synchronous reactance is preferred in the present day alternators, 
because one can have 
(a) reduced sub-transient currents (b) reduced harmonic currents 
(c) reduced transient currents 
(d) higher voltage regulation with load 
1.9 A series R-L-C circuit when excited by a 10V sinusoidal voltage source of variable 
frequency, exhibits resonance at 100 Hz and has a 3 dB bandwidth of 5 Hz. The 
voltage across the inductor L at resonance is: 
(a) 10 V (b) 10 2V (c) 
10
2V
(d) 200V 
1.10 The RMS value of a half-wave rectified symmetrical square wave current of 2A is: 
(a) 2A (b) 1A (c) 
1
2A
(d) 3A
1.11 Electodynamic type wattmeters have large errors while measuring power in ac 
circuits at low power factor conditions, since the voltage across and the current 
through the 
(a) current coil are not in phase (b) current coil are not in quadrature 
(c) pressures coil are not in phase 
(d) pressure coil are not in quadrature 
1.12 The current in the circuit shown in Fig.1.12 is: 
(a) 5A (b) 10A 
(c) 15A (d) 25A 
1.13 For the circuit shown in Fig.1.13, the capacitance measured between terminals B 
and Y will be 
(a) 
2
s
c
C
C
? ?
+
? ?
? ?
(b) 
2
c
s
C
C
? ?
+
? ?
? ?
(c) 
( ) 3
2
s c
C C +
(d) 3 2
c s
C C +
~ 
20O 
200 
V
200V 
100V 
50Hz 
i 
C c C c 
C s C s 
C c 
R 
B
Y 
GATE EE - 1999
1.14 An overhead line having a surge impedance of 400O is connected in series with 
an underground cable having a surge impedance of 100O. If a surge of 50 kV 
travels from the line end towards the line-cable junctions, the value of the 
transmitted voltage wave at the junction is: 
(a) 30 kV (b) 20 kV (c) 80 kV (d) -30 kV 
1.15 The load carrying capability of a long AC transmission line is: 
(a) always limited by the conductor size 
(b) limited by stability considerations 
(c) reduced at a low ambient temperatures  
(d) decreased by the use of bundled conductors of single conductors 
1.16 Corona losses are minimized when 
(a) conductor size is reduced (b) smooth conductor is reduced 
(c) sharp points are provided in the line hardware 
(d) current density in conductors is reduced 
1.17 In a DC transmission line 
(a) it is necessary for the sending end and receiving end to be operated in 
synchronism. 
(b) the effects of inductive and capacitive reactances are greater than in an AC 
transmission line of the same rating. 
(c) there are not effects due to inductive and capacitive reactances 
(d) power transfer capability is limited by stability considerations.  
1.18 Steady state stability of a power system is the ability of the power system to 
(a) maintain voltage at the rated voltage level 
(b) maintain frequency exactly at 50 Hz 
(c) maintain a spinning reserve margin at all times 
(d) maintain synchronism between machines and on external tie lines 
1.19. Three sections of a feeder are provided with circuit breakers CB1, CB2, CB3, CB4, 
CB5 and CB6. For a fault F as indicated in Fig.1.19. 
(a) CB5 must be set to trip after CB1 trips  
(b) CB5 must be set to trip after CB3 and CB4 trips 
(c) CB5 must be set to trip after CB2 trip  
(d) CB5 must be set to trip before CB1, CB2, CB3 and CB4 trips 
CB1 CB2 CB3 
CB4 CB5 CB6 F 
GATE EE - 1999
1.20. A 4-pole lap-wound DC generator has a developed power of P watts and voltage 
of E volts. Two adjacent brushes of he machine are removed as they are worn 
out. If the machine operates with the remaining brushes, the developed voltage 
and power that can be obtained from the machine are  
(a) E, P (b) ,
2 2
E P
(c) E, 
4
P
(d) E, 
2
P
1.21. Starting torque can be obtained in the case of a single phase induction motor 
with identical main and auxiliary windings by connecting 
(a) a capacitor across the mains 
(b) a capacitor in series with the machine 
(c) a capacitor in series with the auxiliary winding 
(d) the main and the auxiliary windings in series 
1.22. The windings of a QkVA, 
1
2
V
V
volt, three-phase, Delta connected, core type 
transformer are reconnected to work as a single phase transformer. The 
maximum voltage and the power ratings of the new configuration are,  
(a) 
1
2
3
,3
3
V
Q
V
(b) 
1
2
,
3
V Q
V
(c) 
1
2
3
,2
3
V
Q
V
(d) 
1
2
2 2
,
2 3
V Q
V
1.23. Resonant converters are basically used to 
(a) generate large peaky voltage (b) reduce the switching losses 
(c) eliminate harmonics  
(d) convert a square wave into a sine wave 
1.24. A PWM switching scheme is used with a three phase inverter to 
(a) reduce the total harmonic distortion with modest filtering 
(b) minimize the load on the DC side 
(c) increase the life of the batteries 
(d) reduce low order harmonics and increase high order harmonics 
1.25 The following starting method for an induction motor is inferior view of the poor 
starting torque per ampere of the line current drawn: 
(a) Direct line starting 
(b) Auto transformer method of starting 
(c) Series inductor method of starting 
(d) Star-Delta method of starting 
GATE EE - 1999
2. This question consists of 25 (TWENTTY FIVE) sub-questions. Each sub-question
carries TWO marks. The answers to these sub-questions MUST be written only in
the appropriate boxes corresponding to the questions in the first page of the
answer book.
2.1 The color code of a 1 kO resistance is:
(a) black, brown, red (b) red, brown, brown 
(c) brown, black, red (d) black, black, red 
2.2. A rectangular current pulse of duration T and magnitude I has the Laplace 
transform 
(a) 
I
s
(b) ( ) exp
I
Ts
s
? ?
-
? ?
? ?
(c) ( ) exp
I
Ts
s
? ?
? ?
? ?
(d) ( ) 1 exp
I
Ts
s
? ?
? ? - -
? ?
? ?
? ?
2.3. A rectangular voltage pulse of magnitude V and duration T is applied to a series 
combination of resistance R and capacitance C. The maximum voltage developed 
across the capacitor is: 
(a) 
-
1 exp
T
V
RC
? ? ? ?
-
? ? ? ?
? ? ? ?
(b) 
VT
RC
(c) V (d) exp
T
V
RC
- ? ?
? ?
? ?
 
2.4. When a periodic triangular voltage peak amplitude 1 V and frequency 0.5 Hz is 
applied to a parallel combination of 1O resistance and 1 F capacitance, the 
current through the voltage source has wave-form. 
(a) (b) 
(c) (d) 
2.5. For a flip-flop formed from two NAND 
gates as shown in Fig.2.5, the unusable 
state corresponds to 
(a) X = 0, Y = 0 
(b) X = 0, Y = 1 
(c) X = 1, Y = 0 
(d) X = 1, Y = 1 
X 
Y 
Q 
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Electrical Engineering (EE) 1999 GATE Paper without solution Electrical Engineering (EE) Notes | EduRev

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