The north magnetic pole (NMP) is the point at the Earth's surface where the geomagnetic field is directed vertically downward. It drifts in time as a result of core convection, which sustains the Earth's main magnetic field through the geodynamo process. During the 1990s the NMP drift ...
What is the North Pole? What is a magnetic monopole? What is a rotating magnetic field? What is a temporary magnet? What is a permanent magnetic field? Which pole of a compass needle points to the south pole of a magnet? What is the South Pole?
True north is a direction that refers to the geographic north pole rather than the magnetic north pole. The geographic north pole is a theoretical... Learn more about this topic: Cardinal & Intermediate Directions | Definition & Importance ...
根据倒数第三段 “The earth's magnetic field is what protects us from harmful space radiation which can damage cells and cause cancer.(地球磁场保护我们免受有害的太空辐射的伤害,太空辐射会破坏细 胞并导致癌症)”可推知,地球磁场是人类的保护伞。故选A。 【13题详解】 细节理解题。根据倒数第二段...
molecules. When left alone, these molecules point in all different directions. If a magnet is pulled over the material multiple times moving the same direction, the molecules will line up like a series of tiny magnets north end to south end, creating magnetic poles on either end of the ...
The Coldest Place on Earth Hasn't Been Experienced by Humans Environmental Science The Largest Desert in the World Isn't the Sahara Wild Animals How Polar Bears Work Environmental Science Earth's Magnetic North Pole Has Rapidly Shifted in the Past 40 YearsAdvertisementLoading... Advertisement...
What will be the orientation of a freely moving magnetic needle near the magnetic poles of the earth? View Solution Assertion (A): It is not necessary that every magnet has one north pole and one south pole. Reason (R ): It is a basic fact that magnetic poles occur in pairs ...
Even the Earth, in fact, has a pair of poles: the north and south poles. Overview of Magnetic Poles Magnetic poles are sections on a magnet where the magnetic field is the strongest. They are found on opposite ends. The north pole is found on one end of a magnet, whereas the south ...
Word Decomposition 北极 běijí the North Pole; the Arctic Pole; the north magnetic pole 海 hǎi ocean; sea; great number of people or things; (dialect) numerous; (Chinese surname)Related WordsWords With Same Head Word 北极熊 běijí xióng...
those in a bar magnet, the magnetic moment (m) is defined as the strength of the poles (p) multiplied by the distance between the poles (L), which can be represented by the equation m = pL. The direction of the moment points from the south pole of the magnet to its north pole. ...