Ask Question, Ask an Expert


Ask Electrical & Electronics Expert


Draw graphs involving algebraic, trigonometric and logarithmic data from a variety of scientific and engineering sources, and find out realistic estimates for variables using graphical estimation techniques
a) The voltage v across an inductor L, in LR electrical circuit drops exponentially over time t (s).  The relationship is;


Where the emf, E, and τ are constants.  Use the table of values for t and v and logarithms to plot an appropriate straight line graphs.
t    0.00    0.010    0.020    0.025    0.030    0.040    0.050
v    5.50    2.950    1.600    1.150    0.850    0.450    0.250
Use your graph to compute the values of E and?.  How long did it takes to half the initial voltage?


Make estimates and determine engineering parameters from graphs, diagrams, charts and data tables

b) The following data are for cold-worked carbon steel tested in a tensile test:

Original diameter        :     12.725 mm
Final diameter            :     8.433 mm
Original gauge length  :     50.8 mm
Final gauge length      :     60.71 mm

(kN)    5.5    11.7    17.0    22.1    27.4    40.5    53.1    60.5    64.7    66.9    68.7    70.5    71.5    72.1    72.8
(mm)    0.010    0.020    0.030    0.040    0.050    0.076    0.102    0.127    0.152    0.178    0.203    0.254    0.305    0.356    0.508

The maximum load was 74.3 kN. Plot the stress – strain graph and determine;

i) realistic estimation of the modulus of elasticity

ii) relationship between stress and strain

Quetion3 )

Find out the numerical integral of scientific and engineering functions

c) Use the trapezium rule with eight strips to estimate the length of an ellipse circumference defined by:

1337_ellipse circumference.jpg
d) Repeat problem1 using Simpson’s rules   


Estimate values for scientific and engineering functions using iterative techniques.

e) Use the Newton-Raphson method correct to 4 d.p. to find the roots of the following equation.
t2 e3t=25


Represent force systems, motion parameters and wave forms as vectors and determine required engineering parameters using analytical and graphical methods

f) An aircraft of top speed 340 km per hour sets a course to the north-east but, owing to the prevailing wind, its actual speed relative to the ground is 450 km per hour in a direction of 40° east of north.  Using analytical and graphical methods:

• Represent the aircraft motion as vectors

• Determine the direction and the speed of the winds

g) Determine the resultant force acting on the eyebolt shown in Figure below as result of the four forces shown in the figure below, analytically and graphically.  Compare and comment on the two results

668_Force on eyebolt.jpg


Represent linear vector equations in matrix form and solve the system of linear equations using Gaussian elimination.

h) Use Gaussian elimination; find out the current, i1, i2, i3, in each branch of an electrical network thatproduced the following set of simultaneous equations

2i1-i2+i3 =-2

i1+2i2+3i3 = -1

2i1+2i2-i3= 8


Use vector geometry to model and solve appropriate engineering problems

i) A force of magnitude 3 units acts at the point with coordinates (1,2,3).  The force is applied in the direction of the vector 3i-j+4k .  Find the moment of the force about O. Also find the moment of the force about the point with coordinate (1,2,3)

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M91338
  • Price:- $95

Guranteed 48 Hours Delivery, In Price:- $95

Have any Question? 

Related Questions in Electrical & Electronics

1 discuss briefly the motional emf concept2 what is lenzs

1. Discuss briefly the motional emf concept. 2. What is Lenz's law? 3. How would you orient a loop antenna in order to obtain maximum signal from an incident electromagnetic wave which has its magnetic field linearly pol ...

For the following truth tablea give the dnf equation for

For the following truth table: a. Give the DNF equation for the table. b. Minimize the equation using a K-map. c. Show that the DNF is equivalent to the minimum representation using Boolean algebra.

Figure 3012 shows a router using fifo queuing at the input

Figure 30.12 shows a router using FIFO queuing at the input port. The arrival and required service times for seven packets are shown below; ti means that the packet has arrived or departed i ms after a reference time. Th ...

1 why is a circle with its center at the center of the

1. Why is a circle with its center at the center of the Smith Chart known as a constant SWR circle? Where on the circle is the corresponding SWR value marked? 2. Using the Smith Chart, how do you find the normalized line ...

1 what does the word retarded in the terminology retarded

1. What does the word retarded in the terminology retarded magnetic vector potential refer to? Explain. 2. Discuss the application of the magnetic vector potential in the determination of the electromagnetic fields due t ...

In communication channels transmitted signal is propagated

In communication channels, transmitted signal is propagated simultaneously by several paths of varying lengths. This causes the signal to reach the destination with varying time delays and varying gains. Such a system ge ...

A current distribution is given bywhere j0 is a constant

A current distribution is given by where J 0 is a constant. Using Ampere's circuital law in differential form and symmetry considerations, find the magnetic field everywhere.

1 a 15 v aa battery that costs 1 is rated at 18 ah what is

1. A 1.5 V AA battery that costs $1 is rated at 1.8 Ah. What is its cost per kWh? 2. Suppose a 12-V battery bank rated at 200 Ah under standard conditions needs to deliver 600 Wh over a 12-h period each day. If they oper ...

A sinusoid cosomega0t is a bandpass signal with zero

A sinusoid cos(ω0t) is a bandpass signal with zero bandwidth. This implies that the sampling rate that will allow reconstruction of this signal from its samples can be arbitrarily small. Show that this is indeed the case ...

1 distinguish between centralized and decentralized p2p

1. Distinguish between centralized and decentralized P2P networks. 2. What are the advantages and disadvantages of a centralized P2P network? 3. What are the advantages and disadvantages of a decentralized P2P network? 4 ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen