Sub Name: Electronic Devices & Circuits / Faculty Name: Mrs. Dhanya Vineesh / Sem: 3rd

Q1. List down the differences between Intrinsic & Extrinsic Semiconductors.

Q2. Why there is no current in open circuit graded semiconductor. Explain the potential variation within graded semiconductor.

Q3.Distinguish between diffusion current and drift current. Calculate the resistivity of intrinsic Ge at room temperature. If one donor impurity atom is added in 108 Ge atoms then what will be the value of resistivity.

Q4.A sample of Ge is doped with 1014 atoms of acceptor impurity per cm3 while 1013 atoms of donor impurity per cm3. Calculate total current density if at same temperature the intrinsic resistivity is 45Ω-cm and applied electric field is 3V/cm. Assume n = 0.38 m3/V-sec and p =0.18m3/V-sec.

Q5.The resistivity of two sides of a step graded Ge junction is 5 Ω-cm on p-side and 2.5 Ω-cm on n-side. Calculate the height of potential barrier. If the resistivity of the sides is interchanged, calculate the height of the potential barrier.

Sub Name:Network Analysis and Synthesis / Faculty Name:Dolly Reney / Sem: 3rd

Q1.Write relationship between various matricesA,B& Q?

Q2.Write the relationship between parameter set

Q3.Find the condition for symmetry reciprocity for two port network

Q4.Given below the network

Find:- Z,Y,T,H parameter

Sub Name: Industrial Instrumentation / Faculty Name: Mr. Shishir Verma / Sem: 3rd

Q 1) What are the features of a Measurement System?

Q 2) How phase difference and frequency can be measured using CRO?

Q 3) Compare Dual Trace and Dual beam CRO?

Q 4) Explain Digital Oscilloscope with the help of suitable diagram?

Q 5) Compare LED and LCD?

Sub Name: Applied Mathematics-III / Faculty Name: DR.SASANKA SEKHAR BISHOYI / Sem: 3rd

Q1.Find the Laplace Transform of the Function

Q2.Find the inverse Laplace Transform of

Q3.Find the inverse Laplace Transform of

Q4.Using Convolution Theorem find the Inverse Laplace

Transform of

Q5. Using Laplace Transform solve

When

Sub Name: PRV / Faculty Name: Shyam ku. patel / Sem: 3rd

Q1.Find the trigonometric Fourier series representation of the continuous time square –wave voltage signal shown in fig

Q2.Find the trigonometric Fourier series representation of the triangular wave form shown in fig..

Q3.Find the CTFT(continuous time Fourier transform) of the trapezoidal pulse shown in fig.

Q4.Find the CTFT(continuous time Fourier transform) of given triangular pulse shown in fig. Also draw the frequency spectrum

Sub Name: Digital Logic Design / Faculty Name:Prashant Shrivastava / Sem: 3rd (E &T)
Q1. Perform the following operations.
a) Divide 110101 by 100
b)Multiply (2A6)16 by (21)16
c)(0.375)10=(?)2
d)(2.125)10=(?)8
Q2. Convert the following numbers as directed:
a)(E5)16=(?)BCD
b)(10110)2=(?)gray code
c)(159)10=(?)excess-3 code
Q3.Do as directed:
a) Find the equivalent decimal number of 10111 which is in straight binary complement(SBC)format.
b)Represent -11 in sign magnitude format.
c)Represent +53 in complementary 2's complement (CTC)format.
d)Express (1011) in 84-2-1 code.
Q4. Carry out the following subtraction as shown:
i) (913)10-(435)10 by 9's complement
ii)(468)10-(618)10 by 10's complement
iii)(101011)2-(100010)2 by 1's complement
iv)(101100)2-(110010)2 by 2's complement
v)(01100111)2+(10010110)2 where the most significant bit is the sign bit.

Q5. Detect and correct errors, if any, in the even parity Hamming code words and write the correct code.

I)1100110 ii) 0011101 iii) 0111110 iv) 1010111