Maharashtra State Board of Technical Education 2009 Diploma in Hospital Management (E - Applied science) - Question Paper

Maharashtra State Board of tech. Education
Course Name: Electrical and Electronics Engineering Group
Course Code: EE/EP and ET/EJ/EN/EX/IE/IS/IC/DE/EV/MU/ IU/ED/EI
Semester :- Second
Subject: - Applied science Subject Code: - 9008
Duration: three Hours (For Both parts together) Marks - 80

part - I

Instructions: - 1) All ques. are Compulsory.
2) Draw neat tagged diagrams wherever necessary.
3) Use of non-programmable calculator is allowed.

Q.1) Attempt any 8 of the following: (8x2=16)
1) State Coulomb’s inverse square legal regulations.
2) describe dielectric strength, breakdown potential.
3) State kinds of condenser.
4) State any 2 applications of optical fibres.
5) describe capacitance, state its SI unit.
6) Draw the configuration of an optical fibre.
7) describe valence band, Fermi energy.
8) Draw energy level diagram for Insulator & semiconductor.
9) A fibre has a core diameter of four mm & its core refractive index is 1.43. The
refractive index of cladding is 1.415. Determine Numerical aperture.
10) What is current density in pure semi conductor?
11) When germanium is doped with aluminum, is the outcome n-type or p-type
semiconductor? provide cause.

Q.2) Attempt any 3 of the following: (3x4=12)
1) State any 4 properties of electric lines of force.
2) Derive an expression for potential due to point charge.
3) obtain the equivalent capacitance for the combination of capacitors shown
below(see attachment beneath for diagram).
Where C1 = 12.0 mF, C2 = 5.30 mF, C3 = 4.50
mF
4) 2 point charges 16 mc & 64 mc are
placed three m apart in air. obtain the
position of point in ranging from them
where intensity due to 2 charges is equal.

Q.3) Attempt any 3 of the following: (3x4=12)
1) State formula to obtain potential of the earth.
A sphere of diameter eight cm is placed in the medium of dielectric constant 1.2
and is provided charge of 0.024 mc. obtain potential at its surface.
2) What is Numerical aperture? discuss with the tagged diagram. State formula to
obtain numerical aperture.
3) Differentiate ranging from intrinsic & extrinsic semiconductors.
4) State formula for
i) Capacity of parallel plate condenser
ii) Spherical condenser
iii) Cylindrical condenser
iv) Condensers in parallel

part – II

Q. 4.A. Attempt any 4 of the following: 08 Marks
1. What is a fuel cell ?
2. Write 2 applications of glass based optical fibres.
3. elaborate insulators ? provide their examples.
4. describe solder.
5. Why does the equivalent conductivity of a weak electrolyte increases with
dilution ?

Q. 4.B. Attempt any 2 of the following: 08 Marks
1. What is cementation ? How is it done ? discuss what is meant by
chromozing.
2. provide cause :
i. Impure metals corrodes faster than pure metal under identical
conditions.
ii. Iron corrodes faster than Aluminium, even though Iron is placed
beneath Al in the electrical series.
3. Write properties and applications of (a) Teflon, (b) Epoxy resins.

Q. 5. Attempt any 3 of the following: 12 Marks
1. Write briefly about (a) Primary Cells, (b) Secondary Cells.
2. How does fuel cell differ from battery ? elaborate the advantages and limitations
of fuel cell ?
3. elaborate the raw materials used in making ceramics ? Write properties
and applications of porcelain.
4. discuss the construction and functioning of a denial cell.

Q. 6. Attempt any 3 of the following: 12 Marks
1. describe metallurgy. elaborate the important ores of copper ?
2. define refining of Aluminium by electrolysis. Name the process.
3. i. describe specific conductivity. How is it related to equivalent conductivity
?
ii. What is buffer solution ? What chemicals can be used to make a buffer of pH
5 and pH 10.
4. Write composition, properties and applications of Babbitt metal.

Earning:   Approval pending.