B.ECH ASSIGNMENTS

APPLIED CHEMISTRY- I

1. Explain the structure and mechanism of functioning of the battery used in automobiles.
2. Discus the structure and functioning of batteries used in cell phones and laptops.
3. How can you say a fuel cell is similar to primary cell? Explain with one example.
4. Explain the mechanism of electrochemical corrosion.
5. What are the differences between chemical and electrochemical corrosion & electro
chemical series and galvanic series?
6. Explain the following.
a) Why food stuff should not be stored in galvanised containers?
b) How the base of ships and metallic pipes in the underground soil are protected against
corrosion.

ASSIGNMENT Subject: BASIC ELECTRICAL ENGINEERING(CSE & IT)

1. What is the principle of DC generator & explain the operation in detail?
2. a) What do you mean by torque of a dc motor?
b) A 250V, 12.5KW DC shunt motor takes a current of 4A and runs at 1000rpm on no
load. Its armature and field resistances are 0.5Ω and 250Ω respectively. Calculate its
efficiency when delivering full load output.
3. A 6 pole DC generator with a shunt field resistance of 200Ω and armature resistance of
0.1Ω has 500 lap connected conductors in its armature. The flux/pole is 0.02Wb. If a load
resistance of 10Ω is connected across the armature terminals and the generator is driven at
1000rpm, calculate the power absorbed by the load.
4. What do you mean by transformer? Derive the expression for induced emf in a
transformer.
5. Explain how rotating magnetic field produced in a 3-phase induction motor.
6. Explain the principle and operation of PMMC instruments.

 ENGINEERING CHEMISTRY

1. How can you say a fuel cell is similar to primary cell? Explain with one example.

2. Explain the mechanism of electrochemical corrosion.

3. Explain the following.

a) Why food stuff should not be stored in galvanised containers?

b) How the base of ships and metallic pipes in the underground soil are protected against

corrosiosn.

4. Write about the preparation and properties of a polymer that is used in the preparation of

Socks, ropes and dress material

5. a) Discuss the structure of the product present in the latex of Hevea brasiliensis

b) Explain the Good year’s process of improving the properties of natural rubber

6.a) Write the differences between thermo plastics and thermosetting plastics?

b) Write the preparation of Bakelite?

Engineering Physics-IAssignment – IIQuestions

1. A) Explain Phase space and Ensembles.
B) Distinguish among MB, BE & FD statistics.
2. A) Derive an expression for MB distribution law.
B) A system has only two particles. How these particles can be arranged in
three states according to MB, FD & BE distributions.
3. Derive an expression for Plank’s radiation law by applying BE distribution
and deduce Rayleigh-Jeans law and Wien’s radiation law from Plank’s law.
4. A) Explain the distinguish features of dia-para-ferro –anti-ferro and ferri
magnetic materials?
B) The magnetic susceptibility of Al is 2.3X10-5. Find its permeability and
relative permeability.
5. A) Explain hysteresis loop observed in ferromagnetic materials on the basis
of domains.
B) Distinguish between hard and soft magnetic materials.
6. A) What is Meissner effect? Explain.
B) Describe the difference between Type-I and Type-II superconductors?
C) Find the critical magnetic field at 4.2K. Take critical temperature for lead
as 7.18K and critical magnetic field at 0K as 6.51X104 A/m.