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The rotating armature consists of one or more coils of wire wound around a laminated, magnetically "soft" ferromagnetic core. Current from the brushes flows through the commutator and one winding of the armature, making it a temporary magnet (an electromagnet). The magnetic field produced by the armature interacts with a stationary magnetic field produced by either PMs or another winding a field coil, as part of the motor frame. The force between the two magnetic fields tends to rotate the motor shaft. The commutator switches power to the coils as the rotor turns, keeping the magnetic poles of the rotor from ever fully aligning with the magnetic poles of the stator field, so that the rotor never stops (like a compass needle does), but rather keeps rotating as long as power is applied.
What element of the motor keeps the poles from alligning?
A: commutator

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In the 200506 season, Barcelona repeated their league and Supercup successes. The pinnacle of the league season arrived at the Santiago Bernabeu Stadium in a 30 win over Real Madrid. It was Frank Rijkaard's second victory at the Bernabeu, making him the first Barcelona manager to win there twice. Ronaldinho's performance was so impressive that after his second goal, which was Barcelona's third, some Real Madrid fans gave him a standing ovation. In the Champions League, Barcelona beat the English club Arsenal in the final. Trailing 10 to a 10-man Arsenal and with less than 15 minutes remaining, they came back to win 21, with substitute Henrik Larsson, in his final appearance for the club, setting up goals for Samuel Eto'o and fellow substitute Juliano Belletti, for the club's first European Cup victory in 14 years.
What team did Barcelona defeat to win the Champions League trophy?
A: Arsenal

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From the fifth century to the thirteenth, Srauta sacrifices declined, and initiatory traditions of Buddhism, Jainism or more commonly Shaivism, Vaishnavism and Shaktism expanded in royal courts. This period produced some of India's finest art, considered the epitome of classical development, and the development of the main spiritual and philosophical systems which continued to be in Hinduism, Buddhism and Jainism. Emperor Harsha of Kannauj succeeded in reuniting northern India during his reign in the 7th century, after the collapse of the Gupta dynasty. His empire collapsed after his death.
What declined from the 5th to the 13th centuries
A: Srauta sacrifices

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The Roman Catholic Church canon law also includes the main five rites (groups) of churches which are in full union with the Roman Catholic Church and the Supreme Pontiff:
How many rights are there net Eastern Catholic church?
A:
unanswerable