What are the mechanisms by which lightning strokes develop and induce overvoltages on overhead power lines? Maximum one Page
What are the mechanisms by which lightning strokes develop and induce overvoltages on overhead power lines?...
What are the mechanisms by which lightning strokes develop and induce overvoltages on overhead power lines? What are the mechanisms by which lightning strokes develop and induce overvoltages on overhead power lines?
an overhead electric power line carries a maximum current of 250 A. what is the magnitude of the maximum magnetic field in telsa at a point 0.037 m directly below the power line?
An overhead electric power line carries a maximum current of 125 A. What is the magnitude of the maximum magnetic field at a point 4.50 m directly below the power line? Ans: 5.6 x 10-6T
What factors contribute to the ignition fires after an earthquake? A. Power lines arc B. Gas lines to appliances break C. Chemicals spill and mix D. Electrical appliances are shaken into dangerous positions (e.g., a lamp falls onto a couch), which are not noticed because the power is out (and the building may be evacuated), but when power comes back on, they pose a fire hazard. E. All of the above
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 1.94 cm in diameter and carries a current of 112 A. If the bird's feet are 9.18 cm apart, what is the potential difference across its body? Copper's resistivity is 1.68 x 10-822 m. Answer in units of 4V.
Explain what a teratoma is and propose one-two mechanisms by which scientists might be able to go about avoiding this situation. Briefly explain.
Consider that your company is planning to develop a manufacturing Information Systems. What basic functions are needed and which type of input data are needed for each function. Briefly explain. (Not more than one page)
What mechanisms are involved in clearance? Describe them and illustrate the process by which a deleterious mutation—say, the allele Abad—is cleared. Why doesn’t clearance typically occur in asexual species? Say two deleterious alleles, Abad andBbadder , are fairly close to one another on the same chromosome. Describe/illustrate how only one of the two deleterious alleles are transmitted to the next generation as opposed to both of them
1. What is the largest power of two to which the following numbers are aligned? a. 11010101000002 b. 0xA3318 c. 0x2F379C d. 0x7043000 2. How many address lines would be needed for each of the following amounts of memory space? a. 819,200 b. 100 MB 3. How many 4K blocks of physical memory would be required after the program malloc’s 2 MB of virtual memory?
Write a small report of maximum one page answering the following questions: [8 marks] (a) What is apparent power? (b) What is reactive and real power? (c) What is the power factor? (d) What cause the changes of power factor and how can you improve the power factor in a network 4. A parallel RLC circuit, which is driven by a variable frequency 2 A current source, has the following values: R= 1 KQ ,L=100 ml, and C= 10 uF....