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ISRO EC Live Quiz Session 2018: Solution (6th April)
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Question 1
Consider an abrupt PN junction (at T = 300 K) shown in the figure. The depletion region width Xn on the N-side of the junction is 0.2 μm and the permittivity of silicon (εsi) is 1.044x10-12 F/cm At the junction, the approximate value of the peak electric field (in kV/cm) is _________.
Question 2
Certain current distribution gives rise to the vector magnetic potential
Wb/m.The flux through the surface defined by is ______ Wb.
Wb/m.The flux through the surface defined by is ______ Wb.
Question 3
A logic circuit consist of two 2 x 4 decoder as shown in figure
The output of the decoder are as follows:
Do = 1 when Ao = 0 and A1 = 0
D1 = 1 when Ao = 1 and A1 = 0
D2 = 1 when Ao = 0 and A1 = 1
D3 = 1 when Ao = 1 and A1 = 1
The value of f(x,y,z) is
The output of the decoder are as follows:
Do = 1 when Ao = 0 and A1 = 0
D1 = 1 when Ao = 1 and A1 = 0
D2 = 1 when Ao = 0 and A1 = 1
D3 = 1 when Ao = 1 and A1 = 1
The value of f(x,y,z) is
Question 4
The bridge most suited for measurement of a four-terminal resistance in the range of is
Question 5
In the schmitt trigger circuit shown in figure, If VCE(sat) = 0.1V, the output logic low level (VOL) is
Question 6
Match the following List-I with List-II
List-I
A) PCM
B) FSK
C) Asynchronous TDM
D) DM
List-II
1) Telegraphy
2) Pulse shifting
3) Simple circuit
4) Companding
5) Threshold effect
List-I
A) PCM
B) FSK
C) Asynchronous TDM
D) DM
List-II
1) Telegraphy
2) Pulse shifting
3) Simple circuit
4) Companding
5) Threshold effect
Question 7
While simplifying a block diagram, a take-off point is moved ahead of a block as shown below. Find the value of A
Question 8
The solution of the differential equation with y(0 = y’(0) = 1 is
Question 9
When the optical power incident on a photodiode is and the responsivity
is 0.8 A/W, the photocurrent generated (in ) is
is 0.8 A/W, the photocurrent generated (in ) is
Question 10
A one bit full adder takes 75 nsec to produce sum and 50 nsec to produce carry. A 4 bit parallel adder is designed using this type of full adder. The maximum rate of additions per second can be provided by 4 bit parallel adder is Ax106 additions/sec. The value of A is _____ .
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ESE & GATE ECGeneralFeb 5ESE & GATE EC