Ask Electrical & Electronics Expert

Task 1: Draw graphs comprising algebraic, trigonometric and logarithmic data from a range of scientific and engineering sources, and find out realistic estimates for variables by using graphical estimation methods.

The voltage v across an inductor L, in LR electrical circuit drops exponentially over time t (s). The relationship is:

v = Ee-1/ τ

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 estimate the values of E and τ. How long did it takes to half the initial voltage?

Task 2: Make estimates and find out engineering parameters from graphs, diagrams, charts and data tables.

The given 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 

1955_load extension.jpg

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

a) Realistic estimation of the modulus of elasticity.
b) Relationship between stress and strain.

Task 3: Find out the numerical integral of scientific and engineering functions.

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

2306_trapezium rule.jpg

Repeat Task1 using Simpson’s rules.

Task 4: Estimate values for scientific and engineering functions by using iterative techniques.

Use the Newton-Raphson method correct to 4 d.p. to find the roots of the following equation.

t2 e3t = 25

Task 5: Represent force systems, motion parameters and wave forms as vectors and find out required engineering parameters using analytical and graphical methods.

A) 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 40o east of north. Using analytical and graphical methods:

a) Represent the aircraft motion as vectors.
b) Find out the direction and the speed of the winds.

B) Find out 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.

949_resultant force.jpg

Task 6: Represent linear vector equations in matrix form and solve the system of linear equations by using Gaussian elimination.

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

2i1 – i2 + i3 = -2
i1 + 2 i2 + 3 i3 = -1
2i1+ 2 i2 - i3 = 8

Task 7: Use vector geometry to model and solve appropriate engineering problems

A force of magnitude 3 unit’s acts at the point with coordinates (1, 2, 3). The force is applied in the direction of the vector.  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.:- M91003

Have any Question?


Related Questions in Electrical & Electronics

Question 1for the ce amplifier in figure 1 given the

Question 1 For the CE amplifier in Figure (1), given the following component parameters: Parameter Value β DC , β AC 150 V BE 0 . 7 V V CC 12 V R C 820 ? R E 1 100 ? R E 2 220 ? R 1 20 k? R 2 5 . 2 k? R L 100 k? C 1 , C ...

Question -i a star-connected three-phase synchronous

Question - (i) A star-connected, three-phase synchronous induction motor takes a current of 10 amps from a 415 volt supply at unity power factor when supplying a steady load. If the synchronous reactance is 5 ohms/phase ...

1 a name the three major groups of contamination and

1. (a) Name the three major groups of contamination and briefly describe their physical characteristics. (b) Where do the above contamination types come from? Give one example of each. 2. Name two processes metrics which ...

Question 1 in the voltage regulator circuit in figure p221

Question 1: In the voltage regulator circuit in Figure P2.21, V 1 = 20 V, V Z = 10 V, R i = 222Ω and P z (max) = 400 mW. (a) Determine I L, I z , and I L , if R L = 380Ω. (b) Determine the value of R L , that will establ ...

Summative assessmentin 2017 sej101 assessment will consist

Summative Assessment In 2017 SEJ101 assessment will consist of nine tasks that will develop a portfolio of your assessed work. Throughout the trimester you will have the opportunity for feedback on all nine tasks before ...

1 a name the three major groups of contamination and

1. (a) Name the three major groups of contamination and briefly describe their physical characteristics. (b) Where do the above contamination types come from? Give one example of each. 2. Name two processes metrics which ...

1 a name the three major groups of contamination and

1. (a) Name the three major groups of contamination and briefly describe their physical characteristics. (b) Where do the above contamination types come from? Give one example of each. 2. Name two processes metrics which ...

Case studythis assignment consists of a written report of

CASE STUDY This assignment consists of a written report of approximately 1000 words and any diagrams in which you are asked to critically compare different process methods used to achieve the same result and show an awar ...

Problem 1 a two-phase servomotor has rated voltage applied

Problem 1: A two-phase servomotor has rated voltage applied to its excitation winding. The torque speed characteristic of the motor with Vc = 220 V, 60 Hz applied to its control phase winding is shown in Fig.1. The momen ...

Electrical engineering questions -q1 two ideal voltage

Electrical Engineering Questions - Q1. Two ideal voltage sources designated as machines 1 and 2 are connected, as shown in the figure below. Given E 1 = 65∠0 o V, E 2 = 65∠30 o V, Z = 3Ω. Determine if Machine 1 is genera ...

  • 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

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As