Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Barlows_wheel> ?p ?o }
Showing triples 1 to 49 of
49
with 100 triples per page.
- Barlows_wheel abstract "Barlow's wheel was an early demonstration of a homopolar motor, designed and built by English mathematician and physicist, Peter Barlow in 1822. An electric current passes through the hub of the wheel to a mercury contact on the rim; this is contained in a small trough through which the rim passes. Due to health and safety considerations brine is sometimes used today in place of mercury. The interaction of the current with the magnetic field of a U-magnet causes the wheel to rotate. The presence of serrations on the wheel is unnecessary and the apparatus will work with a round metal disk, usually made of copper.\"The points of the wheel, R, dip into mercury contained in a groove hollowed in the stand. A more rapid revolution will be obtained if a small electro-magnet be substituted for a steel magnet, as is shown in the cut. The electro-magnet is fixed to the stand, and included in the circuit with the spur-wheel, so that the current flows through them in succession. Hence the direction of the rotation will not be changed by reversing that of the current; since the polarity of the electromagnet will also be reversed.\"(Excerpt taken from the 1842 edition of the Manual of Magnetism, page 94)How The Wheel MovesAction of a magnet on current and how rotational motion is produced due to this can be shown by Barlow's wheel experiment. The apparatus consists of a star shaped copper wheel capable of rotating freely in a vertical plane about a horizontal axis. The point of each spoke of the star just dips into a pool of mercury kept in a small groove on the wodden base of the apparatus. The pool of mercury is kept in between the two opposite poles of a strong magnet. The wheel rotates with its plane being perpendicular to the direction of the magnetic field and during its rotation only one point of the star dips into the pool of mercury at a time. When the axis of the wheel and the mercury are connected to electric cell, the circuit is completed through the axis of the wheel (when a point dips in the mercury) and the mercury. On passing current through the circuit the wheel will begin to rotate due to the action of the magnet on the current. The direction of rotation of the wheel can be determined by applying Fleming's left hand rule. While rotating and when a spoke of the wheel just leaves the mercury the circuit breaks but due to inertia of motion the wheel continues its motion and brings the next spoke in contact with the mercury thereby restoring the electrical contact. In this way rotation of the wheel continues. On reversing the direction of the current or that of the magnetic field the wheel rotates in the opposite direction. The speed of rotation depends upon the strength of the magnetic field and the strength of the current. Here mechanical energy is obtained from electrical energy.".
- Barlows_wheel thumbnail Diagram_of_barlows_wheel.jpg?width=300.
- Barlows_wheel wikiPageExternalLink index.html.
- Barlows_wheel wikiPageExternalLink barlowswheel.html.
- Barlows_wheel wikiPageExternalLink monat_0907.htm.
- Barlows_wheel wikiPageID "987792".
- Barlows_wheel wikiPageLength "4391".
- Barlows_wheel wikiPageOutDegree "13".
- Barlows_wheel wikiPageRevisionID "675377816".
- Barlows_wheel wikiPageWikiLink Brine.
- Barlows_wheel wikiPageWikiLink Category:Electric_motors.
- Barlows_wheel wikiPageWikiLink Copper.
- Barlows_wheel wikiPageWikiLink Electric_current.
- Barlows_wheel wikiPageWikiLink England.
- Barlows_wheel wikiPageWikiLink Homopolar_motor.
- Barlows_wheel wikiPageWikiLink Johann_Michael_Ekling.
- Barlows_wheel wikiPageWikiLink Magnetic_field.
- Barlows_wheel wikiPageWikiLink Mathematics.
- Barlows_wheel wikiPageWikiLink Mercury_(element).
- Barlows_wheel wikiPageWikiLink Peter_Barlow_(mathematician).
- Barlows_wheel wikiPageWikiLink Physics.
- Barlows_wheel wikiPageWikiLink File:Diagram_of_barlows_wheel.jpg.
- Barlows_wheel wikiPageWikiLinkText "Barlow's wheel".
- Barlows_wheel wikiPageUsesTemplate Template:Commons_category.
- Barlows_wheel wikiPageUsesTemplate Template:Electric_motor.
- Barlows_wheel wikiPageUsesTemplate Template:Expand_section.
- Barlows_wheel wikiPageUsesTemplate Template:Reflist.
- Barlows_wheel subject Category:Electric_motors.
- Barlows_wheel hypernym Demonstration.
- Barlows_wheel type ArtificialSatellite.
- Barlows_wheel type Motor.
- Barlows_wheel type Redirect.
- Barlows_wheel comment "Barlow's wheel was an early demonstration of a homopolar motor, designed and built by English mathematician and physicist, Peter Barlow in 1822. An electric current passes through the hub of the wheel to a mercury contact on the rim; this is contained in a small trough through which the rim passes. Due to health and safety considerations brine is sometimes used today in place of mercury. The interaction of the current with the magnetic field of a U-magnet causes the wheel to rotate.".
- Barlows_wheel label "Barlow's wheel".
- Barlows_wheel sameAs Q808334.
- Barlows_wheel sameAs عجلة_بارلو.
- Barlows_wheel sameAs বার্লোর_চক্র.
- Barlows_wheel sameAs Barlows_wheel.
- Barlows_wheel sameAs Barlow-Rad.
- Barlows_wheel sameAs چرخ_بارلو.
- Barlows_wheel sameAs Roue_de_Barlow.
- Barlows_wheel sameAs Wiel_van_Barlow.
- Barlows_wheel sameAs Koło_Barlowa.
- Barlows_wheel sameAs m.03wzh0.
- Barlows_wheel sameAs Roata_lui_Barlow.
- Barlows_wheel sameAs Q808334.
- Barlows_wheel wasDerivedFrom Barlows_wheel?oldid=675377816.
- Barlows_wheel depiction Diagram_of_barlows_wheel.jpg.
- Barlows_wheel isPrimaryTopicOf Barlows_wheel.