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GATE 2019: Topper Quiz 19 (App update required to attempt this test)

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Question 1

The hybrid equivalent circuit for a common-emitter configuration is given below.

Determine the parameters for its equivalent model.

Question 2

Two voltage of +0.6V and -1.4V are applied to the two input resistors of a summing amplifier. The respective input resistors are 400KΩ and 100KΩ and feedback resistor is 200KΩ. Determine the out put voltage.

Question 3

Find the output expression for

Question 4

A 4-bit serial-in-parallel-out shift register is used with a feedback as shown in figure. The shifting sequence is QAQBQCQD

If the output is 0000 initially, the output repeats after

Question 5

A 100 kV, 5 N sec rectangular surge on a line having a surge impedance of approaches a station at which concentrated earth capacitance is 4000 PF. The maximum value of transmitted voltage is ………………. kV.

Question 6

In a two plant system, the load is connected to plant number 2. The loss coefficients

Question 7

A full-bridge converter supplying in RLE load is shown in figure. The firing angle of the bridge converter is 120o. The supply voltage Vm(t) = 200π.sin(100πt) V, R=20Ω, E=800 V.The inductor L is large enough to make the output current IL. a smooth dc current. Switches are lossless. The real power fed back to the source. In kW is ________.



Question 8

The switches Ti and T2 are shown in Figure

 
They are switched in a complementary fashion with sinusoidal pulse width modulation technique. The modulating voltage u,„ (t)= 0.8sinV and the triangular carrier voltage are as shown in Figure (b). The carrier frequency is 5kHz. The peak value of the 100Hz component of the load current, in ampere, is

Question 9

A 220 V, dc shunt motor draws 15 A while operating on rated load at a speed of 180 rad/s. The armature resistance and the field winding resistance of motor are 0.5 ohm and 100 ohms respectively. During plugging, the external resistance (in Ohm) to be added with armature resistance to limit the current to 125% of its rated value is?

Question 10

A 200V dc shunt machine having armature resistance of 0.5 Ω and field resistance of 100Ω. The machine is operated first as generator and then as motor separately. Calculate the ratio of the speed as generator to the speed as a motor if the machine is connected to 200V supply mains and line current of machine in both the cases is 48A.

Question 11

Given below is the open-loop transfer function of a feedback control system.

Which of the following point does not lie on the root locus of the given system_____ (s=?)

Question 12

The open-loop transfer function of a feedback control system is obtained as:

How many branches of the root loci of the given system terminate at infinity?

Question 13

Let the z -transform of a signal be given as

then the value of x[3] is _________.

Question 14

Find the value of integral given below ___________

Question 15

Given r++ɸ, || at the point (1,π,π/2)…..

Question 16

A solenoid of 30cm long and 2cm diameter has 100 turns winding. If the maximum torque on solenoid exerted is 4Nm and current of 15 A. The uniform magnetic field of strength is …..(wb/m2)

Question 17

An ac bridge circuit working at 1000 Hz with arm AB at is 0.1 μF pure capacitance; arm BC is a 500Ω pure resistance; arm CD contains an unknown impedance and arm DA has a 300 Ω resistance in parallel with a 0.1 μF capacitor, then the magnitude of unknown impedance in Ω is ______.

Question 18

A vibrational galvanometer is used for frequency range of

Question 19

In the circuit shown, the switch S is closed at t = 0 after long time. If(____ (in Amp).

Question 20

Consider a circuit as shown in fig below

Equivalent resistance across the terminals A & B is_____Ω.
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Jun 10ESE & GATE EE