Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 2, Problem 7RQ
Each time constant of an exponential curve is equal to what percentage of the whole?
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b) Find the time constant associated with this transient analysis. Enter only a numeric value (with no units entered) and express your answer in units of seconds.
c) Find the time it takes for the temperature of the wire surface to reach a temperature that is within 2∘C of the steady-state temperature of the wire. Enter only a numeric value (with no units entered) and express your answer in units of seconds.
d) Find the time constant associated with this transient analysis.
e) Find the time it takes for the temperature of the wire surface to reach a temperature that is within 2∘C of the steady-state temperature of the wire.
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Chapter 2 Solutions
Electrical Transformers and Rotating Machines
Ch. 2 - What determines the polarity of magnetism when...Ch. 2 - What determines the strength of the magnetic field...Ch. 2 - Prob. 3RQCh. 2 - How many lines of magnetic flux must be cut in 1 s...Ch. 2 - Prob. 5RQCh. 2 - Into how many time constants is an exponential...Ch. 2 - Each time constant of an exponential curve is...Ch. 2 - An inductor has an inductance of 0.025 H and a...Ch. 2 - Prob. 9RQCh. 2 - What electronic component is often used to prevent...
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- For 10-2 above, the last part of Step 6 and the final answer seems to be missing or cut off on my screen. Can you please re-write Step 6 so that I can see it? Thank youarrow_forward1. Suppose identical solid spheres are distributed through space in such a way that their centers are lie on the points of a lattice, and spheres on neighboring points just touch without overlapping. (Such an arrangement of spheres is called a close-packing arrangement.) Assuming that the spheres have unit density, show that the density of a set of close-packed spheres on each of the four structures (the "packing fraction") is: fcc: bcc: √√2/6=0.74 √√3/8=0.68 SC: π/6=0.52 √√3/16=0.34 diamond:arrow_forwardI tried 33.7oC and also 50.517oC but it still says it is incorrect (view attached screenshot). I appreciate your efforts, but unfortunately it says it is still wrong. Any more ideas of what the correct answer might be? I really want to understand how to solve this problem correctly. Thank you!arrow_forward
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