| 1 |
The RMS value of the voltage u(t) =3 + 4cos
(3t) is |
| Options |
| A)
V |
B) 5 V |
| C) 7 V |
D) (3 + 2
) V |
|
|
|
| Correct Answer |
A |
|
| 2 |
The open loop transfer function of a unity feed back control
system is given as
G(s) =
The value of ‘a’ to give a phase margin of 45° is equal to |
| Options |
| A) 0.141 |
B) 0.441
|
| C) 0.841 |
D) 1.141 |
|
| |
|
| Correct Answer |
C |
|
| 3 |
The armature resistance of a permanent magnet
dc motor is 0.8 W. At no load, the motor draws 1.5 A from a supply
voltage of 25 V and runs at 1500 rpm. The efficiency of the motor
while it is operating on load at 1500 rpm drawing a current of 3.5 A
from the same source will be |
| Options |
| A) 48.0% |
B) 57.1%
|
| C) 59.2% |
D) 88.8% |
|
|
|
| Correct Answer |
A |
|
| 4 |
The solution of the first order differential
equation x(t) = -3x(t), x (0) = x0 is
|
| Options |
| A) x (t) = x0 e-3t |
B) x (t) = x0 e-3
|
| C) x (t) = x0 e-1/3 |
D) x (t) = x0 e-1 |
|
|
|
| Correct Answer |
A |
|
| 5 |
The unit impulse response of a second order
under-damped system starting from rest is given by
c(t) = 12.5 e-6t sin 8 t, t 
0
The steady-state value of the unit step response of the system is
equal to |
| Options |
| A) 0 |
B) 0.25 |
| C) 0.5 |
D) 1.0 |
|
| Correct Answer |
D |
|
| 6 |
A single-phase, 230 V, 50 Hz, 4 pole, capacitor-start induction
motor has the following stand-still impedances
Main winding Zm = 6.0 + j4.0 W
Auxiliary winding Za = 8.0 + j6.0 W
The value of the starting capacitor required to produce 90° phase
difference between the currents in the main and auxiliary windings
will be
|
| Options |
| A) 176.84 mF |
B) 187.24 mF |
| C) 265.26 mF |
D) 280.86 mF
|
|
|
|
| Correct Answer |
A |
|
| 7 |
A single-phase half-controlled rectifier is driving a separately
excited dc motor. The dc motor has a back emf constant of 0.5 V/rpm.
The armature current is 5 A without any ripple. The armature
resistance is 2W. The converter is
working from a 280 V, single phase ac source with a firing angle of
80°. Under this operating condition, the speed of the motor will be
|
| Options |
| A) 339 rpm |
B) 359 rpm |
| C) 366 rpm |
D) 386 rpm |
|
| |
|
| Correct Answer |
C |
|
| 8 |
The 8085 assembly language instruction that
stores the content of H and L registers into the memory locations
2050H and 2051H, respectively, is
|
| Options |
| A) SPHL 2050H |
B) SPHL2051H |
| C) SHLD 2050H |
D) STAX 2050H
|
|
|
|
| Correct Answer |
C |
|
| 9 |
A 50 Hz, 4-pole, 500 MVA, 22 kV turbo-generator
is delivering rated megavolt-amperes at 0.8 power factor. Suddenly a
fault occurs reducing is electric power output by 40%. Neglect
losses and assume constant power input to the shaft. The
accelerating torque in the generator in MNm at the time of the fault
will be |
| Options |
| A) 1.528 |
B) 1.018 |
| C) 0.848 |
D) 0.509 |
|
E&E
|
|
| Correct Answer |
A |
|
| 10 |
The Nyquist plot of loop transfer function G(s)
H(s) of a closed loop control system passes through the point (-1,
j0) in the G(s) H(s) plane. The phase margin of the system is |
| Options |
| A) 0° |
B) 45°
|
| C) 90° |
D) 180°
|
|
| |
|
| Correct Answer |
D |
Active Topics 
Memberlist 
Calendar 
Search 
Help
Register 
Login
One Stop GATE Forum : GATE Previous Years Test Papers - Discuss Here : EE Papers
Topic: E&E GATE Sample paper
Topic: E&E GATE Sample paper
IP Logged
