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GATE EC: 2018 Mini Mock 8

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Question 1

A differential amplifier has an open circuit voltage gain of 100. This amplifier has a common input signal of 3.2V to both terminals and out put signal is 26mV.Determine the CMRR in dB

Question 2

In the silicon BJT circuit shown below, assume that the emitter area of transistor Q1 is half that of transistor Q2.

The value of current I₀ in mA ?

Question 3

Find the z- transform (including the ROC) of the signal given x[n] =3ⁿu[-n+3] ?

Question 4

A coil has an inductance of $5 H$ and resistance $20 Ω$ . An emf of $100 v$ is applied to it. What is the energy stored in the magnetic field, when the current has reached its final value

Question 5

In the sentence identify the segment which contains the grammatical error. If the sentence has no error, then select 'No error'.

Harry was trying for admission in the Engineering College even though his sister wanted him to take up commerce.

Question 6

A spherical capacitor is formed using two concentric spherical conducting shells of radius 9 cm and 4 cm, separated by a nylon dielectric of

. Determine the potential difference between the two spheres, if a charge of 55 µC is given to the inner sphere.

Question 7

Find digital equivalent obtained for an analog input of 2.896V, Conversion time and the resolution of the converter if the parameters of a counter type ADC are
Clock frequency = 1 MHz, comparator threshold =0.2 mV, full scale output of DAC used = 8.56, DAC inputs is 10 –bits?

Question 8

For the given open-loop transfer function of a feedback control system:

While plotting the root locus of the system, it was found that the breakaway point lies on the real axis between -1 and -2. Determine the breakaway point_____(s=?)

Question 9

A transistor is connected in CB configuration. When emitter voltage is changed by 100 m V, the emitter current changes by 10 m A, During this variation collector to base voltage is kept constant. Calculate the dynamic input resistance of the transistor______ (fill in the blanks).

Question 10

Consider the following program for 8085:
XRA A
LXI B, 0008 H
LOOP: DCX B
ADD A
JNZ LOOP
The LOOP will be executed

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ESE & GATE EC General

Jun 1ESE & GATE EC

GATE EC: 2018 Mini Mock 8

A coil has an inductance of 5H and resistance 20Ω. An emf of 100 V is applied to it. What is the energy stored in the magnetic field, when the current has reached its final value

A coil has an inductance of $5 H$ and resistance $20 Ω$ . An emf of $100 v$ is applied to it. What is the energy stored in the magnetic field, when the current has reached its final value