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GATE 2019: Topper Quiz 15 (App update required to attempt this test)

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Question 1

In UJT relaxation oscillator the value of R = 5kΩ, C = 0.065μF, intrinsic stand off ratio, ŋ = 0.65. The frequency of this UJT relaxation oscillator is ……………….kHz.

Question 2

Consider a unity feedback system with forward transfer function given by

The steady-state error in the output of the system for a unit-step input is __________ (upto 2 decimal places).

Question 3

A digit timer counter possesses a base clock of frequency 100 MHz. When measuring a particular input, the reading obtained is the same in: (i) Frequency mode of operation with a gating time of one second and (ii) Period mode of operation (in the x 10 ns scale). The frequency of the unknown input (reading obtaineD. in Hz is _______.

Question 4

A 6-pole, 3-ɸ induction motor is connected to a 25 Hz supply and at full load the rotor e.m.f. makes 110 complete cycles in 2 minutes the full load percentage slip is

Question 5

In a rotor fed induction motor, the speed of stator magnetic field with respect to rotor will be

Question 6

Find the magnitude of the electric field intensity in V/m at the origin due to an 8nC charge located at (2, –3, 1).

Question 7

A DC voltmeter has a sensitivity of 100 ohm/Volt. When it measures half full scale in 10 V range, the current in mA through the voltmeter will be in:

Question 8

Determine the range of the digital voltmeter in Volt with digit display that displays a voltage of 0.14253 V as 0.14 V?

Question 9

In the network shown, the switch is opened at t = 0 prior to that the network was in the steady – state find at t = 0.

Question 10

The driving point input impedance seen from the source Vs of the circuit shown below, in is__________.

Question 11

The switching wave forms of the transistor switch is shown in figure. duty cycle α is 50% and switching frequency is 10 kHz determine :

Determine time at which peak power loss during turn on process is occurs.

Question 12

a thyristor converter of 200kA is connected to supply mains through a di/dt inductor of reactance 7%. If current over load factor is 2.5, then the inductor power is____(KVA)

Question 13

In the system shown below,

Generator voltage is ……………..p.u.

(Assume 100 mVA and 15 kV as base values at generator terminal)

Question 14

A 15MVA, 11KV generator is directly connected to a transmission line. A short circuit occurs between the two phases of line (b and c). The positive, negative and zero sequence reactance in ohms are as follows;

The fault current in the line is….

Question 15

What will be the output if A synchronous motor connected to an infinite bUB takes power at a lag p.f. If its excitation is increased?
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Jun 6ESE & GATE EE