Lecture 12
... An electric motor can be viewed simply as an inverted electric generator. The current is the input (rather than the output), and the rotary motion is the output (rather than the input). As a result, it is possible to switch an electric motor from consuming electric power to producing power. This pro ...
... An electric motor can be viewed simply as an inverted electric generator. The current is the input (rather than the output), and the rotary motion is the output (rather than the input). As a result, it is possible to switch an electric motor from consuming electric power to producing power. This pro ...
P6E
... DC electric motors A force can act on a wire carrying an electric current when it is in a magnetic field. This does not happen if the wire is parallel to the magnetic field, but it does happen when the wire is at right angles to the magnetic field. The direction the wire moves depends on the directi ...
... DC electric motors A force can act on a wire carrying an electric current when it is in a magnetic field. This does not happen if the wire is parallel to the magnetic field, but it does happen when the wire is at right angles to the magnetic field. The direction the wire moves depends on the directi ...
How do we get our electricity? - Mr. Stewart`s Physical Science
... Why do you think these are called fossil fuels? Millions of years ago, before the dinosaurs roamed the earth, lots of plants grew strong from the energy of the sun. Then they died and became buried in thick layers beneath lots of mud and soil. The remains of animals became buried as well. Over the ...
... Why do you think these are called fossil fuels? Millions of years ago, before the dinosaurs roamed the earth, lots of plants grew strong from the energy of the sun. Then they died and became buried in thick layers beneath lots of mud and soil. The remains of animals became buried as well. Over the ...
Name Class Date Review for Electricity and Magnetism Test Units
... _______ 13. path that an electric current follows _________ 14. the units used for power _______ 15. opposition to the flow of electric current _______ 16. unit used to measure electric current _________ 17. the units used for energy _______ 18. unit used to measure voltage Concepts and Challenges i ...
... _______ 13. path that an electric current follows _________ 14. the units used for power _______ 15. opposition to the flow of electric current _______ 16. unit used to measure electric current _________ 17. the units used for energy _______ 18. unit used to measure voltage Concepts and Challenges i ...
Electric Motors
... cobalt). This magnetic effect comes from a special alignment of the atomic structure of the material. All magnets have two poles, a north pole and a south pole. It is impossible to have a singular magnetic pole; they always come in pairs. Magnets follow the rule that opposite poles attract and like ...
... cobalt). This magnetic effect comes from a special alignment of the atomic structure of the material. All magnets have two poles, a north pole and a south pole. It is impossible to have a singular magnetic pole; they always come in pairs. Magnets follow the rule that opposite poles attract and like ...
Magnetism and Induction
... The circulating iron’s free electrons create the fields. South pole of this magnet actually off Greenland (still called Magnetic North). The poles flip about every 500,000 years ...
... The circulating iron’s free electrons create the fields. South pole of this magnet actually off Greenland (still called Magnetic North). The poles flip about every 500,000 years ...
Electric Potential Energy
... Referring back to mechanics and the gravitational potential energy: ...
... Referring back to mechanics and the gravitational potential energy: ...
Electricity
Electricity is the set of physical phenomena associated with the presence and flow of electric charge. Electricity gives a wide variety of well-known effects, such as lightning, static electricity, electromagnetic induction and electric current. In addition, electricity permits the creation and reception of electromagnetic radiation such as radio waves.In electricity, charges produce electromagnetic fields which act on other charges. Electricity occurs due to several types of physics: electric charge: a property of some subatomic particles, which determines their electromagnetic interactions. Electrically charged matter is influenced by, and produces, electromagnetic fields. electric field (see electrostatics): an especially simple type of electromagnetic field produced by an electric charge even when it is not moving (i.e., there is no electric current). The electric field produces a force on other charges in its vicinity. electric potential: the capacity of an electric field to do work on an electric charge, typically measured in volts. electric current: a movement or flow of electrically charged particles, typically measured in amperes. electromagnets: Moving charges produce a magnetic field. Electric currents generate magnetic fields, and changing magnetic fields generate electric currents.In electrical engineering, electricity is used for: electric power where electric current is used to energise equipment; electronics which deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies.Electrical phenomena have been studied since antiquity, though progress in theoretical understanding remained slow until the seventeenth and eighteenth centuries. Even then, practical applications for electricity were few, and it would not be until the late nineteenth century that engineers were able to put it to industrial and residential use. The rapid expansion in electrical technology at this time transformed industry and society. Electricity's extraordinary versatility means it can be put to an almost limitless set of applications which include transport, heating, lighting, communications, and computation. Electrical power is now the backbone of modern industrial society.