Electrical Engineering Answers

(2x+3y-5)dx+(3x-y-2)dy=0

a) Find the total amount of electrons embedded within the sphere with r = 6 m, given that the ρv = ‒ 14/(r sin 𝜃) nC/m3

b) A standard good quality USB fast charging wire should capable to deliver a maximum power of 100W. Ali has bought a cheap USB wire from RM2 shop. He found that the wire with length of 2.0 m only capable to charge his mobile phone, at 5V 2A. As a technologist and scored A+ in the subject of Electromagnetic Theory, Ali knows that in order to fast charge his phone, he has to replace the low current density cheap wire. Ali saw that Mr.DIM shop selling the single core wire come with specification of 282.8 nΩm and 1.2 mm diameter. If he wishes to rebuild a same length of USB-C wire which is capable to deliver a fast charging current of 4.5A,

(i) what is the minimum electric current density of the desired wire?

(ii) is the wire that Ali saw in Mr.DIM shop suitable for this wire rebuild project? Justify your answer with mathematical prove with assuming the phone impedance is 1Ω.

Alight ray is incident from glass to air. If the transmitted power is 0 dB,

compute the reflected power.

• 4. Re-connect Figure 1. (a) with R equal to 50 ohms, L equal to 100 mH, and

sketch the waveforms of input voltage, output voltage, and output current.

Compare the results with the results in Figure 1. By calculation of:

a. The dc output voltage.

b. The r.m.s. input voltage source.

c. The energy that transfer from the source to the inductor.

d. The efficiency of rectification.

https://www.chegg.com/homework-help/questions-and-answers/rs-m-ana-tyde-3-re-connect-figure-1-r-equal-50-ohms-sketch-waveforms-input-voltage-output--q66270555 link of figure

.Three loads, each of resistance 30Ω are connected in star to a 415V, 3-phase supply. Determine :(i) The system phase voltage (ii) The phase current (iii) The line current

TASK 3 

Task 3 requires you to carry out a full risk assessment on a typical item or area from your selected working environment with which you are familiar with. You need to include all the hazards identified in task 2 and also use the Health and Safety `five steps to risk assessment’ procedures to complete this task. 

Task 8

Making specific reference to the risk assessment completed in Task 3, justify the methods used to deal with hazards in the workplace. Your response should include the need to comply with workplace policies and legal requirements in your answer.

Explain why it is important to an organisation to carry out all part of a risk assessment in a suitable manner. You should illustrate your answer with specific examples of regulations that contain a requirement for risk assessments to be carried out. 

Describe the precautions needed for the safe storage of the following materials: 

1. Gases 
2. Oils 
3. Acids 
4. Rolled steel 

This task requires you to suggest a suitable process or equipment to assist in moving the following load correctly and safely: 

1. 12 - DC Power supply unit 
2. Sheet steel 
3. Pallets 
4. Kegs 
5. Oxygen Cylinder bottle 
6. Rolled steel 

TASK 3 

Task 3 requires you to carry out a full risk assessment on a typical item or area from your selected working environment with which you are familiar with. You need to include all the hazards identified in task 2 and also use the Health and Safety `five steps to risk assessment’ procedures to complete this task. 

                                                This task provides evidence for grading criterion P6. 

TASK 4 

1. This task requires you to suggest suitable control measures for the risks identified in your risk assessment in task 3 and state the reasons why they are suitable. 

1. For each of the control measures identified in Task 4a describe how the control measures can prevent accidents.