GATE EE 2019: ThunderBolt Mini Mock 1 for ESE & GATE EE Exams

Question 1

Let

be the Fourier transform of

then the value of

at

will be _______.

Question 2

A Signal x(t) has Fourier transform

phase and magnitude of

are shown below

Determine x(t) at t=5 sec _________.

Question 3

if

And Laplace transform of

Then Laplace transform of

Question 4

Given that

And

Find

Question 5

For the flip flop configuration shown below find the operation carried out by this configuration.

Question 6

For the flip flop configuration as shown above for clock input to T flip flop. The mod of the above flip flop configuration will be _______.

Question 7

Given below is arrangement of different counters the input frequency of clock is

and the output frequency is

. The value of n will be _______.

Question 8

Find the Laplacian of the scalar field

V = 10r sin²θcos

Question 9

A vector field

to represent a magnetic field at (1, 2, 3) the value of R should be,

Question 10

A 100 MVA 50 Hz two alternator operate at no load at 3000 rpm. A Load of 27 mw is suddenly applied to the machine and the steam values to the turbine commence to open after 0.6 sec due to time – log in the governor system. Calculate the frequency to which the generator voltage drop before the steam flow to increase to meet the steam flow to increase to meet the new load. Inertia constant H = 4.5 KW – sec / KVA.

Question 11

A 3 – Φ salient pole alternator has direct axis reactance and Quadrature axis reactance is 0.6 P.u and 0.3 P.u respectively. when the terminal voltage is 1 P.u., exaltation voltage is 1.1 P.u. to deliver maximum power is ______

Question 12

A p-channel JFET has V_P=4 V and I_DSS=12 mA . It is used in the circuit of figure given below with V_DD=12 V. Determine R_D and R_S so that I_D=4 mA and V_DS=6 V

Question 13

A generator is transferring power to a load through a short line. The power angle equation is P = Pm Sinδ where Pm = 2 p.u. The initial power is 1 p.u. when 3 – Φ fault occurs at the terminal of the generator then the critical clearing angle (in degrees) will be (Assume H = 6 MJ / MVA, f = 50 Hz)

Question 14

A 50 Hz, 4 pole Turbogenerator rated at 110 MVA, 112 KV has an inertia consultant of 10 MJ/MVA. Mechanical input is suddenly rise to 100 MW from 70 MW then the rotor acceleration is

Question 15

A 50 Hz, 8 pole generator with H = 6 MJ/MVA delivers 1 p.u. to an infinite bus has and supply 45% of peak power capacity as shown. A 3 – Φ fault occur at the point F. find the critical clearing time (in seconds) ?

Question 16

In the given circuit, the silicon transistor has β = 75 and a collector voltage V_C = 9V. Then the ratio of R_B and R_C is __________.

Question 17

Determine the maximum drain current in mA for the JFET in the given network, if

Question 18

The output characteristics for a BJT are given below.

Determine the hybrid parameter

, if

Question 19

Determine the input and output impedances of the given network.

Question 20

Given the feedback as unity and open loop transfer function as

For k=1, the gain margin is 18db. When the gain margin is 10dB, k is ______

Question 21

If a system has an open loop transfer function G(s)H(s) =

, then the gain of the system at frequency of 10 rad/s will be

Question 22

The loop transfer function of a system is given by G(s)H(s) =

. The total number of root loci is:

Question 23

Find the resistance and inductance of the coil if the arms of an ac Maxwell Bridge are given as: AB and BC are non-reactive resistors of value 100 Ω each. Let DA is a standard variable reactor and value of L1 of resistance 32.7Ω and CD comprises a standard variable resistor R connected in series with a coil of unknown impedance. Balance was obtained with L1=47.8mH and R=1.36Ω?

Question 24

Find the value of the resistance and the inductance of the branch CD if the balance is obtianed under these conditions. if the armsof ana.c. maxwellbridgeare given as: AB is a non-inductive resistanceof 1000 Ω in parallel with a capacitor of capacitance 0.5 μF, BC is a non inductive resistance of 600Ω and CD is an inductive impedance which is unknown and DA is a non-inductive resistance of 400 Ω?

Question 25

Which of the following are the values of the R3 and L3 from owen bridge?

Question 26

Which of the following bridge is used for measuring an unknown inductance in terms of a known capacitance and resistance?

Question 27

An ac voltmeter uses half wave rectifier and the basic meter with full scale deflection current of 1 mAand the meter resistance of 200 Ω. Calculate the multiplier resistance for a 10 V r.m.s range on the voltmeter.

Question 28

A 3-ɸ bridge converter is provided with line-line voltage of 400 V. A load which is resistive in nature of value 100 ohm takes 400 W of power from the converter, the input power factor will be

Question 29

A 3 phase full converter charges a battery from a three phase supply of 230V, 50Hz. The battery emf is 200V and its internal resistance is 0.5Ω. On account of inductance connected with the battery charging current is constant at 20A. Compute the supply power factor.

_______ lag.

Question 30

A single phase semi converter is operated from 120V, 50Hz ac supply. The load current with an average value I_DC is continuous and ripple free firing angle α=π/6. Determine the harmonic factor of input current?