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GATE EE: 2018 Mini Mock 12

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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

If a vector

is solenoidal which of the following is true.

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 EE General

Jun 1ESE & GATE EE

GATE EE: 2018 Mini Mock 12

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