CSC295 Computer Architecture and Organization
Homework Assignment #3
Problem 1. Perform the following arithmetic and logic operations on two 16bit operands. Note that
the operands are given in 2s complement representation but expressed in Hexadecimal not
ESO 203A: Introduction to Electrical Engineering (2014115, II Semester)
Assignment # 11
1. A threephase, starconnected synchronous generator has rating of 50 kVA, 415 V, 1500 rpm, 50Hz. It
has a resistance of 0.1 ohm/phase and a reactance of 2.0 ohm/ph
Department of Electrical Engineering
IIT Kanpur
29Jul13
Practice Problem 1
Important
As a convention, we will take cos as our reference axis in this course.
For example: 5cos(wt)=3.53<0
5sin(wt)=5cos(wt90o)=3.53<90o
1. Find the phasor form of the fol
Department of Electrical Engineering
IIT Kanpur
31Jul13
Practice Problem 2
1. A current of 10 A flows in a circuit with a 30 Deg. (Lag) when the applied voltage
is 100 V. Find the resistance, reactance, and impedance.
2. In the circuit shown determine w
Department of Electrical Engineering
IIT Kanpur
2Sept13
Practice Problem 13
1.
Element values for a coupled circuit are R 1=3 Ohm, R2=6 Ohm, L1=2 mH, L2=10
mH, and M=4 mH. If w=5000 rad/s, find Zin as seen by source Vs, for ZL equal to
(a) 10 Ohm, (b) 1
Department of Electrical Engineering
IIT Kanpur
25Sept13
Practice Problem 25
1.
The armature of a 4pole lap wound dc machine has core length=30 cm,
diameter=40cm, total conductors=500, speed=1200 rpm and current=20 A. For an
average flux density of 0.5
Department of Electrical Engineering
IIT Kanpur
23Aug13
Practice Problem 11
1. The magnetic circuit of Fig.1 has a ferromagnetic material having the relative
permeability of 1200. The dimensions are shown in Fig.1. Neglecting the
leakage and fringing, d
Department of Electrical Engineering
IIT Kanpur
30Aug13
Practice Problem 13
1.
A ring of magnetic material has rectangular crosssection. The inner diameter of
the ring is 20 cm and outer diameter 25 cm., its thickness being 2 cm. An airgap
of 1 mm len
Department of Electrical Engineering
IIT Kanpur
26Aug13
Practice Problem 12
In Fig.1, each air gap length is g = 0.1cm and crosssectional area Ag = 4 cm2. =
in iron. Find the fluxes through the coils and their directions.
2. In Fig.2, the closed magnet
Department of Electrical Engineering
IIT Kanpur
9Sept13
Practice Problem 17
1. An ideal transformer is used to step down the voltage of a 13.8 kV circuit to 2300
V. It is fully loaded when it delivers 50 kVA. (a) Find the turns ratio and rated
current i
ESO203A: Introduction to Electrical Engineering (20142015, II Semester)
Assignment No. # 10
1. A threephase, 2000 V, Yconnected, 2pole, 50Hz,woundrotor induction motor has the
following noload and blockedrotor test data:
Noload:
2000 V
15.3 A
10.
ESO 203A: Introduction to Electrical Engineering (201415, Second Semester)
Assignment # 8
1.
PartA
A 230 V dc shunt machine has armature circuit resistance of 0.5 and a field
circuit resistance of 115 . If the machine is connected to 230 V supply mains
ESO 203A: INTRODUCTION TO ELECTRICAL ENGINEERING (201415, II Sem)
Assignment # 9
1. A 3phase 50 Hz induction motor has a fullload speed of 1440 rpm. For this motor calculate
(a) The number of poles,
(b) fullload slip and rotor frequency and
(c) the sp
ESO 203A: Introduction to Electrical Engineering (201415 Second Semester)
Assignment # 5 Solution
Problem#1:
Magnetizing inductance
Lm1
N12
3002
3.6 H
R 2.5 104
Primary magnetizing current I
240
2400
j Lm1 j 2 50 3.6
j 0.2122 A 0.2122 90 A
a)
Secondar
ESO203A: Introduction to Electrical Engineering ( 201415, Second Sem.)
Solution of Home Assignment #2
Problem 1)
IP
IQ
20
12
200V
I
P
j 6
Q
j15
6
15
Removing the load impedance (4+j3) , let I be the total current supplied
from the source. Hence,
= (1.4
ESO 203A: Introduction to Electrical Engineering (201415 Second Semester)
Assignment # 11 Solution
Problem#1:
Let E f & Vt 0 be the internal emf (excitation voltage) and terminal voltage of generator
per phase E f & Vt
Vt
Ef
415
0 2400 V
3
Vt 2400
Ia
jX
ESO203A: Introduction to Electrical Engineering (1415/II)
Solution of Home Assignment #4
Problem 1: Mean radius of torroid = 20 cm
20
1.256 m
100
2 2
Cross sectional area ( Ac ) =
4 104 m2
100 100
Mean length of core ( l ) = 2
(a) Since the flux produ
ESO203A: Introduction to Electrical Engineering (1415/II)
Solution of Home Assignment #1
PROBLEM.1
a)
0
Given: v(t ) 311sin(314t 25 ) V
_
In phasor form: V
311
2
25 0 219.9 25 0 V
b)
Given: i(t ) 10sin(10t 600 ) 15sin(10t 300 )
_
In phasor form: I
10
ESO 203A: Introduction to Electrical Engineering (201415 Second Semester)
Assignment # 5
1. A transformer having 300 and 100 turns in primary and secondary windings respectively, is wounded on
a magnetic core having reluctance R = 2.5104 AT/Wb. Assume no
ESO 203A: Introduction to Electrical Engineering (201415 Second Semester)
Assignment # 9 Solution
Problem#1:
(a) Speed of rotor Nr 1440 rpm
frequency f s 50 Hz
Let no. of poles = P and N s =synchronous speed in rpm
for P = 4
120 f s
=3000 rpm
P
N s =1500
ESO 203A: Introduction to Electrical Engineering (201415 Second Semester)
Assignment # 6
1. In Fig. 1, given below, the 50 Hz AC source impedance is (320+j 500) . The source feeds a capacitor and
resistor loads through two ideal transformers, as shown. D
Department of Electrical Engineering
IIT Kanpur
9Sept13
Practice Problem 20
1. A 3phase transformer consisting of three 1phase transformers with turns ratio
10:1 is used to supply a 3phase load of 120 kVA at 400 V on the secondary side.
Calculate the
Department of Electrical Engineering
IIT Kanpur
6Sept13
Practice Problem 16
1.
Find the average power delivered to each of the four resistors in the following
circuit.
5:1
2 A (rms)
Sine wavesource
3:2
30
1
4
1k
2. Find V2 across 10 ohm resistor in the
Department of Electrical Engineering
IIT Kanpur
Aug. 18, 2013
ESO203a/210: Tutorial 2
Note: There are no assignment problems this week. It is a Quiz week.
1. Find the average power supplied by the dependent source.
j1.92
2j
Ix
4.8
8
1.6. Ix
2. For the ne
Department of Electrical Engineering
IIT Kanpur
Sept 01, 2013
ESO203a/210: Tutorial 4
Note: No Assignment Problems this week
1. The magnetic circuit of Fig.1 has a ferromagnetic material having the relative
permeability of 1200. The dimensions are shown i
Department of Electrical Engineering
IIT Kanpur
Aug. 23, 2013
ESO203a/210: Tutorial 3
Note: Question ringed is an assignment problem
1. A balanced three phase load which has a power factor of 0.75 (lag) draws a
current of 200 A per conductor. Power is sup
Department of Electrical Engineering
IIT Kanpur
Aug. 02, 2013
ESO203a/210: Tutorial 1
Note: Questions ringed are assignment problems
1. Compute the thevinin equivalent as seen between a & b.
j50.I
I
100
j5
10 0 V
a
10j
b
2. Using node analysis find the
Department of Electrical Engineering
IIT Kanpur
Sept 09, 2013

ESO203A/ESO210: Practice Midsem
Time: 2 Hour.
Full Mark: 20
1. The following figure shows a ferromagnetic core whose mean path length is 40 cm.
There is a small gap of 0.05 cm (lg) in the st
Department of Electrical Engineering
IIT Kanpur
Sept 22, 2013
ESO203a/210: Tutorial 6
Note: Assignment Problem is ringed.
1. Core loss at rated voltage and copper loss at 80% of full load of a 20 kVA,
2200/220V, 50 Hz, single phase transformer are 200 W a