magnetic needle वाक्य
उदाहरण वाक्य
मोबाइल
- Francis Ronalds, Honorary Director of the Kew Observatory and Sabine s colleague, received data from telegraph operators on the movements of their magnetic needles for comparison with his own geomagnetic intensity variations but had insufficient resources to study the causes of the unexpected currents in detail.
- According to Kircher ( 1641 ) he drew up the first chart for the Atlantic and Indian Oceans showing the spots where the magnetic needle makes the same angles with the meridian; if this is true, he should be regarded as the forerunner of Edmund Halley.
- In his " Dream Pool Essays " or " Dream Torrent Essays " (; " Mengxi Bitan " ) of 1088, Shen was the first to describe the magnetic needle compass, which would be used for navigation ( first described in Europe by Alexander Neckam in 1187 ).
- The Admiralty once again instructed the participants to gather such scientific data as " must prove most valuable and interesting to the science of our country . " They were to pay particular attention to magnetic measurements, especially the possible interactions between magnetic needles, atmospheric electricity and the aurora borealis.
- In December 1841, Bain in conjunction with Lieutenant Thomas Wright needle telegraph earlier developed by Ampere, Wheatstone and others : instead of making signals by a pivoted magnetic needle under the influence of an electromagnet, he made them by suspending a movable coil between the poles of a fixed magnet.
- He was a fellow of the Royal College of Physicians of Edinburgh, and author of the book " A Concise Essay on Magnetism; with an Account of the Declination and Inclination of the Magnetic Needle; and an Attempt to ascertain the Cause of the Variation thereof, " published in 1795.
- The magnetic needle compass for navigation was not attested until the " Dream Pool Essays " in 1088 AD by Shen Kuo ( 1031 1095 ), who was also the first to document the concept of true north to discern a compass'magnetic declination from the physical ) North Pole ).
- This discovery, which earned him the Copley Medal of the Royal Society in 1825, was followed by another, that a rotating plate of copper tends to communicate its motion to a magnetic needle suspended over it, which he called " magnetism of rotation " but is now known as eddy current.
- Mathematics in China emerged independently by the 11th century BC . It is indeed almost certain that the Chinese were acquainted with several geometrical or rather architectural implements; with mechanical machines; that they knew of the characteristic property of the magnetic needle; and were aware that astronomical events occurred in cycles.
- There is reason to believe that Gunter was the first to discover ( in 1622 or 1625 ) that the magnetic needle does not retain the same Henry Briggs, his friend and colleague, the use of the arithmetical complement ( see Briggs " Arithmetica Logarithmica ", cap . xv . ).
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