BEE
Note: write the below
guidelines in the first page of the Assignment note book
Guidelines for writing assignment:
1. Read the entire unit thoroughly before writing the assignment
2. Don’t copy the assignment from the others.
3. Write the assignment in separate note book (do not write
in papers, do not write in class work)
4. During the evaluation of the assignment questions will be
asked from the corresponding unit.
5. Strictly instructed to submit the assignment on or before
scheduled time. Assignments will not be accepted after schedule time.
6. during the evolution of the assignment approach towards
the concept, practical understanding of the concept, documentation skills,
presentation skills, problem solving skills are checked. Assignment will be
evaluated for 10 marks.
ASSIGNMENT-1 (unit-1(a): Introduction to electrical engineering)
NOTE: Submit the assignment on or before 09-09-2013
1.
(a) write about electrical engineering concepts that you come across in your daily
life(not more than two pages)
(b) A copper
wire is stretched so that its length is increased by 0.1%. What is the
percentage change in its resistance?
(Ans:
0.2%)
2. (a) Explain the characteristics of resistor, inductor,
capacitor.
(b) A length of wire has a resistance of 4.5
ohms. Find the resistance of another wire of the same material three times long
and twice the cross-sectional area (ans: 6.75 ohm)
(c) Explain
about self inductance and mutual inductance.
3. (a) State and explain ohm’s law and discuss where it
fails.
(b) An electric radiator is required to dissipate 1KW when connected to
a 230V supply. If the coils of the radiator are of wire 0.5mm in diameter
having resistivity of 60µΩ-cm, caluculate the necessary length of the wire
(Ans: 1730.2cm)
4. (a) Explain Laws of resistance (or) explain the different factors on which the
resistance is dependent
(b) Three
resistances of 5 ohms, 10 ohms and 15 ohms are connected in parallel. If the
current in 10 ohms resistance is 3 A, What is the current in other resistors
and total current? Also determine the voltage applied to the circuit
(Ans: 6A, 2A, 11A, 30V)
5. (a) state and
explain Kirchhoff’s laws.
(b ) Two coils connected in parallel across 100v Dc supply, takes 10A current
from the supply. Power dissipated in one coil is 600W.find
(a) What
is the resistance of the coil (ans: 16.667ohm)
(b) What
is the current flowing through that coil(ans:6A)
(c) What
is the current in the other coil(4A)
(d) What
is the resistance of the other coil(25ohm)
6. (a) write a short notes on
(1) Conductors (2) insulators (3)
semiconductors
(b) What is
the voltage across X and Y in the circuit shown in below figure.
