In polyphase systems, there are multiple voltages phase-shifted apart from each other so as to be intentionally âout of step.â. Notes: Although the rationale for polyphase electrical power may not be apparent from either the question or the given answer, your students need to be aware of its existence.olyphase AC voltages are usually created by special alternators, with different âphaseâ windings spaced around the circumference of the stator. Notes: An illustration of polyphase alternator construction would be excellent to aid understanding of this concept.
Baghdad's population was estimated at 7.22 million in 2015. The city historically had a predominantly Sunni population, by the early 21st century around 82% of the city's population were Iraqi Shia. [citation needed] At the beginning of the 21st century, some 1.5 million people migrated to Baghdad, most of them Shiites and a few Sunnis.
The population of the UAE is overwhelmingly urban, with more than 90 percent of the people living in cities. The largest city, Abu Dhabi, the federal capital, had an estimated population of 475,000 in 1992. Dubayy, the second largest city and the UAE's main port and commercial center, had an estimated population of 395,000.