Electric machinery fundamentals
5th Edition
ISBN: 9780073529547
Author: Chapman, Stephen J.
Publisher: MCGRAW-HILL HIGHER EDUCATION
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The joint probability function for the random variables X and Y is given
in Table below. Find a) the marginal probability function of X and Y.
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Suppose a random variable X as pmf
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Px (x) = { %, x = 1, 2, 3,
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find constand c
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Suppose that a coin is tossed three so that the sample space is
Let X represent the number of heads that can come up.
i) Find the probability function corresponding to the random variable X.
Assuming that the coin is fair
ii) Find the distribution function for the random variable X.
iii) Obtain its graph.
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- Q1- A 5 KVA, 240/120 volt, single-phase transformer supplies rated current to a load at 120 V. Determine the magnitude of the load impedance as seen from the input terminals of the transformer. Ans. 11.52arrow_forwardQ1- A single phase transformer consumes 2 A on no load at p.f. 0.208 lagging. The turns ratio is 2/1 (step down). If the loads on the secondary is 25 A at a p.f. 0.866 lagging. Find the primary current and power factor.arrow_forwardI am seeking ideas or references regarding the auxiliary power output for a trolley. I’ve encountered difficulties finding information online about the power output for lights, buzzers, and speakers. Specifically, I am interested in the following questions: How many lights, buzzers, and speakers can a trolley approximately 48 feet in length accommodate?How can I determine their rated power?Any guidance or resources you can provide would be greatly appreciated. Thank you!arrow_forward
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