The New book of knowledge, Volum 11An illustrated encyclopedia containing over 9,000 articles on history, literature, art and music, geography, myths and legends, mathematics, science, hobbies, holidays and festivals, games, sports, crafts, medicine, law, government, industry, politics, and other topics. |
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Side 121
ELECTRIC GENERATORS Electricity makes our lives much more comfortable by
the many tasks it does. Electricity runs ... The movement of the needle led
Oersted to the discovery that an electric current could produce a magnetic effect.
ELECTRIC GENERATORS Electricity makes our lives much more comfortable by
the many tasks it does. Electricity runs ... The movement of the needle led
Oersted to the discovery that an electric current could produce a magnetic effect.
Side 132
MAGNETIC INDUCTION If an electric current produces magnetic lines of force,
why not produce current by means of magnetism? Michael Faraday asked this
question and experimented until he found an answer. One day he pushed a bar ...
MAGNETIC INDUCTION If an electric current produces magnetic lines of force,
why not produce current by means of magnetism? Michael Faraday asked this
question and experimented until he found an answer. One day he pushed a bar ...
Side 137
the last moment the electric current that goes through the rotor is reversed.
Reversing the electric current changes the magnetic poles of the rotor. The north
pole becomes the south pole, and the south pole becomes the north pole. (The
poles ...
the last moment the electric current that goes through the rotor is reversed.
Reversing the electric current changes the magnetic poles of the rotor. The north
pole becomes the south pole, and the south pole becomes the north pole. (The
poles ...
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19th century actinide series Africa Age of Exploration Akhenaten alternating current American ancient animals became began British building built called canal century changes charge chemical church cities coast coil crust developed earth earthquake East eclipse Ecuador eels eggs Egypt Eisenhower electric current electric motor electronic music electrons elements elephants elevator energy engine England English Equatorial Guinea ERBIUM Eskimos Ethiopia Europe European explosives fish flow France Greek heat important Indian Indian elephant industry iron islands kilometers kind king land language lanthanide learned light live magnet ment metal meters modern mountains move nations North ocean oxygen painted Parliament plants plate poems poet poles pollution produce promethium radio River rock Roman schools scientists Soviet Spain steam surface tion United uosipg voltage vote waves William wire wrote
Bibliografisk informasjon
| Tittel | The New book of knowledge, Volum 11 The New book of knowledge, ISBN 0717205207, 9780717205202 |
| Utgave | illustrert |
| Utgiver | Grolier, 1986 |
| ISBN | 0717205177, 9780717205172 |
| Lengde | 21 sider |
| Eksporter sitat | BiBTeX EndNote RefMan |